Aero - Aviation electronics - Rockwell collins
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Transcript of Aero - Aviation electronics - Rockwell collins
A v ia t i o n
E l ec t r o n i c s
G l o s s a r y
A E VIatIon LECTRONICS
G lossary
How to Speak Avionics-ese*
C G o n ten ts of l oss ar y
A ........................................... 2. N ......................................... 76
B ......................................... 15. O ........................................ 80
C ......................................... 18. P ......................................... 83
D ......................................... 28. Q ........................................ 91
E ......................................... 36. R ......................................... 92
F ......................................... 43. S ......................................... 99
G .
....................................... 49. T ........................................110
H ......................................... 53. U ........................................119
I .......................................... 56. V ....................................... 121
J ......................................... 62. W ...................................... 126
K ......................................... 63. X ....................................... 128
L ......................................... 63. Y ....................................... 129
M .
....................................... 67. Z ....................................... 129
_
The.impending.low.speed.stall.speed..xx.is. _.xxV(ss)
typically.a.number.between.0.06.and.0.10..1.06.
of.stick.shaker.speed.would.be.an.example.
Target.approach.speed.indicator..1.3.of.stick. _.3V(ss)
shaker.speed.
Three.or.four.dimension 3-D, 4-D
The.octal.base,.four-digit.code.used.between. 4096 Code
framing.pulses.of.a.reply.to.identify.the.aircraft.or.
for.general.use.and.emergency.codes.(XPD)
10.Mbps.base.band.data.transmission.over. _0 Base T
twisted.copper.wire
(.1.).Auto.tuned.NAVAID.. A
(.2.).Amperes..
(.3.).Aileron.. ( 4 ) At or Above (Altitude Suffix)
Advanced.Surface.Movement.Guidance.and. A-SMGCS
Control.System
ARINC.661 A66_
Aeronautical.Administrative.Communications AAC
Assigned.Altitude.Deviation AAD
Airline.Avionics.Institute AAI
Above.Aerodome.Level AAL
Advanced.Architecture.Micro-Processor AAMP
Aviation and Air Traffic Services AATS
Advanced.Aviation.Transportation.Technology AATT
Autobrake A/B
ARINC.429.Bus.Emulator ABE
Asynchronous.Balanced.Mode ABM
(.1.).Aeronautical.Binary.Phase.Shift.Keying.. A-BPSK
(.2.).Aviation.Binary.Phase.Shift.Keying
Abbreviation ABRV
Absolute ABS
(.1.).Advisory.Circular.. AC
(.2.).Alternating.Current
_
Aircraft A/C
Address.Compression.Algorithm ACA
Air-Cooled.Air.Cooler ACAC
Airborne.Collision.Avoidance.System ACAS
Aircraft.Communications.Addressing.and. ACARS
Reporting.System
Polled.Mode.An.ACARS.mode.of.operation.in. ACARS
which.the.airborne.system.transmits.only.in.
response.to.received.uplink.messages.(polls)
(.1.).Active.Clearance.Control. ACC
(.2.).Area.Control.Center
Accelerometer Acclrm
Aviation.Coordinating.Committee.for. ACCTS
Telecommunications.Services
(.1.).The.control.character.meaning.technical. ACE
acknowledge.
(.2.).Actuator.Control.Electronics. ( 3 ) Advanced Certification Equipment
(.1.).Area.Control.Facility.. ACF
(.2.).ACARS.Convergence.Function.(ARINC.622)
Aircraft Identification ACID
Airfoil.and.Cowl.Ice.Protection.System ACIPS
The.control.character.meaning.technical. ACK
acknowledgement.of.an.uplink,.used.in.an.
ACARS.System
Acknowledge ACKNLGE
Alternating.Current.Motor.Pump ACMP
Aircraft.Condition.Monitoring.System ACMS
Aircraft Certification Office ACO
Audio.Control.Panel ACP
Aircraft Certification Regulatory Program ACRP
(.1.).Active.Control.System. ACS
(.2.).Audio.Control.System
Aeronautical.Communications.Sub-Group ACSG
3
Active ACT
(.1.).Apron.Control.Unit.. ACU
(.2.).Antenna.Control.Unit..
(.3.).Autopilot.Control.Unit
Analog-To-Digital A/D
Administrative.Domain AD
Computer.Programming.Language ADA
Automated Weather Observing System Data ADAS
Acquisition System
Advanced.Design.Adaptive.Test.Executive ADATE
(.1.).Air.Data.Computer:.A.computer.that.receives. ADC
inputs.from.temperature.sensors.as.well.as.
static.and.pitot.ports..Then.it.generates.altitude,.
airspeed,.vertical.speed.and.several.computed.
temperatures...
(.2.).Analog-to-Digital.Converter
Automatic.Direction.Finder:.Receiver.that. ADF
provides bearings to radio frequency transmitters
in a compatible frequency range.
Attitude.Director.Indicator:.A.PFD.display.that. ADI
provides.pitch.and.roll.information.
Air.Data.Inertial.Reference.System ADIRS
Air.Data.Inertial.Reference.Unit ADIRU
(.1.).Aeronautical.Data.Link.. ADL
(.2.).Airborne.Data.Loader.(ARINC.615)
(.1.).Airborne.Data.Link.Protocol. ADLP ( 2 ) Aircraft Data Link Processor (MODE-S)
Aeronautical.Data.Link.Services ADLS
Air.Data.Module ADM
Airline.Data.Management.System ADMS
ARINC.Data.Network.Service ADNS
Air.Data.Processor ADP
Adaptive.Pulse.Code.Modulation ADPCM
Airplane.Data.Recovery.and.Analysis.System ADRAS
4
(.1.).Air.Data.System.. ADS
(.2.).Automatic.Dependent.Surveillance:.
A surveillance technique in which aircraft
automatically.provide,.via.data.link,.data.derived.
from on-board navigation and position fixing
systems, including aircraft identification, four
dimensional.position.and.additional.data.as.
appropriate..
(.3.).Audio.Distribution.System
Automatic.Dependent.Surveillance–Address.. ADS-A
(aka.ADS-C)
Automatic.Dependent.Surveillance–Broadcast ADS-B
Automatic.Dependent.Surveillance–Contract.. ADS-C
(aka.ADS-A)
Address.Selective..ASSR.system.electronically. ADSEL
arranged.to.address.each.transponder.selectively..
Only a particular transponder will respond, thus
avoiding.garbling..ADSEL.uses.a.monopulse.
technique to provide more accurate bearing
measurement..ADSEL.is.compatible.with.DABS..
(Refer.to.Mode.S.transponders.)
Automatic.Dependent.Surveillance.Panel ADSP
(.1.).Automatic.Dependent.Surveillance.System.. ADSU
(.2.).Automatic.Dependent.Surveillance.Unit
Administrative.Data.Transmission.Network ADTN
Advance ADV
Audio.Electronic.Control.Unit AECU
Airlines.Electronic.Engineering.Committee AEEC
Aircraft.Evaluation.Group AEG
(.1.).Audio.Entertainment.Player. AEP
(.2.).Autopilot.Engage.Panel
Automated En Route traffic control AERA
Aircraft.Earth.Station AES
Auxiliary Equipment Unit AEU
Airway.Facilities AF
_
( 1 ) Automatic Frequency Compensation. AFC
( 2 ) Automatic Frequency Control
Automatic.Flight.Control.Augmentation.System AFCAS
Automatic.Flight.Control.System AFCS
(.1.).Adaptive.Flight.Display.. AFD
(.2.).Advanced.Flight.Deck..
(.3.).Autopilot.Flight.Director
Autopilot.Flight.Director.Computer AFDC
Autopilot.Flight.Director.System AFDS
Avionics.Full.Duplex.Switched.Ethernet AFDX
ACARS.Front.End.Processing.System AFEPS
Authority Format Identifier AFI
(.1.).Airborne.Flight.Information.System. AFIS
(.2.).Automatic.Flight.Information.Service
Aircraft.Flight.Manual AFM
ATS Facilities Notification AFN
(.1.).Aeronautical.Fixed.Service. AFS
(.2.).Airborne.File.Server..
(.3.).Automatic.Flight.System
Automatic.Flight.Service.Station AFSS
Audio Frequency Shift Keying AFSK
Aeronautical.Fixed.Telecommunications AFTN
Aerospace.and.Flight.Text.Radio.Coordinating. AFTRCC
Council
Air/Ground A/G
Automatic.Ground-Air.Communication.System..It. AGACS
is.also.known.as.ATCSS.or.DATA.LINK.
Advanced.General.Aviation.Transport.Experiment AGATE
Automatic.Gain.Control..AGC.is.used.to.maintain. AGC
the.output.level.of.the.receiver.
Air.Ground.Intermediate.System AGIS
Above.Ground.Level. AGL
ARINC.661.Graphics.Server AGS
6
Alert.Height:.A.height.above.the.runway.based. AH
on.the.characteristics.of.the.aircraft.and.its.fail.
operational.landing.system,.above.which.a.
Category.III.approach.would.be.discontinued.and.
a.missed.approach.initiated.if.a.failure.occurred.in.
one.of.the.redundant.parts.of.the.fail.operational.
landing.system,.or.in.the.relevant.ground.
equipment.
Attitude.Heading.Computer:.A.computer.that.is. AHC
part.of.the.AHRS..Generates.information.for.the.
pitch.and.roll.displays.
Attitude/Heading.Reference.Systems:.System. AHRS
which.measures.and.outputs.aircraft.attitude.and.
heading.
Attitude/Heading.System:.Either.an.AHRS.or.an. AHS
IRS.
Aircraft.Integrated.Data.System AIDS
Advanced.Intelligence.Tape.-.used.for.the.storage. AIT
of digital video and audio files
Aeronautical.Information.Regulation.and.Control AIRAC
Accumulator.Isolation.Valve AIV
Advanced.Interactive.Executive AIX
AFEPS.Journal.Processing.System AJPS
Autoland A/L
Automatic.Level.Control..A.circuit.used.to. ALC
maintain.the.output.of.a.transmitter.regardless.of.
variations.in.the.attenuation.of.the.system.
Automatic.Link.Establishment ALE
Altimeter ALI
Airline.Pilots.Association ALPA
(.1.).Application.Layer.Structure. ALS
(.2.).Ambient.Light.Sensor
Clear ALSIP
_
(.1.).Airborne.Link.Terminal.. ALT
(.2.).Alternate..
(.3.).Altimeter..
(.4.).Altitude
Alternate.Attitude.Heading.Computer ALT AHC
Altitude.Hold.Mode ALTHOLD
Height.determined.by.barometric.pressure Altitude
A.continuous.return.across.the.display.at.a.range. Altitude Ring
equivalent to aircraft altitude (WXR)
Alternate ALTN
Altitude.Select ALTS
Selected Altitude Capture: An autopilot flight ALTS CAP
director.mode.
Arithmetic.and.Logic.Unit ALU
Amplitude.Modulation..A.signal.where.the.carrier. AM
signal.is.varied.in.amplitude.to.encode.voice.or.
data.information.
Airport.Movement.Area.Safety.System AMASS
Aircraft.Mount.Alignment.Detector AMAT
Avionics.Maintenance.Conference AMC
Aeronautical.Mobile.Communications.Panel AMCP
Amplitude Modulation Equivalent. An AM type AME
signal.that.processes.the.modulated.information.
signal and carrier frequency separately and
then.reconstructs.the.two.signals.to.make.an.
equivalent AM signal.
( 1 ) Airline Modifiable Information . AMI
(.2.).Alpha.Margin.Indicator:.A.device.that.displays.
the.angle.of.attack.
Area.Microphone.Interface.Unit AMIU
Active Matrix Liquid Crystal Display AMLCD
Aircraft.Maintenance.Manual AMM
(.1.).Audio.Management.Panel.. AMP
(.2.).Avionics.Modernization.Program
_
(.1.).Apron.Management.Service.. AMS
(.2.).Avionics.Management.Service
Aeronautical.Mobile.Satellite.(Route).Service AMS(R)S
Aeronautical.Mobile.Satellite.Service AMSS
Aircraft Maintenance Task Oriented Support AMTOSS
System..An.automated.data.retrieval.system.
Aeronautical.Message.Transfer.Service AMTS
Audio.Management.Unit AMU
Audio.Multiplexer AMUX
Air Navigation Commission (ICAO) ANC
An.evacuated.and.sealed.capsule.or.bellows.that. Aneroid
expands.or.contracts.in.response.to.changes.in. Capsule
pressure.
Alaskan.NAS.Interfacility.Communication.System ANICS
ARINC.Network.Layer.Protocol ANLP
Actual.Navigation.Performance:.Measure.of. ANP
the.current.estimated.navigation.performance,.
excluding.Flight.Technical.Error.(FTE).
(.1.).Ambient.Noise.Sensor.. ANS
(.2.).Area.Navigation.System
American.National.Standards.Institute ANSI
Air.Navigation.Service.Provider ANSP
Antenna ANT
Advanced.Networking.Test.Center ANTC
Angle Of Attack AOA
( 1 ) Aeronautical Operational Control. AOC
( 2 ) Aircraft Operational Control.
( 3 ) Airline Operational Control.
( 4 ) Airport Obstruction Chart .
( 5 ) Airport Operational Communications
Airline Operation Control Center AOCC
Audio.on.Demand AOD
Age.of.Data,.Clock.(GPS.term) AODC
Age.of.Data,.Ephemeris.(GPS.term) AODE
9
Aircraft.on.Ground AOG
Air/Oil Heat Exchanger AOHE
Aircraft Operating Manual AOM
( 1 ) Aeronautical OSI Profile . AOP
( 2 ) Airline Operational Procedure
Aircraft Owners and Pilots Association AOPA
Aerodrome Operations Group AOPG
Atlantic Ocean Region AOR
Atlantic Ocean Region-East AOR-E
Atlantic Ocean Region-West AOR-W
Autopilot..A.computer.commanded.system.for. A/P
controlling.aircraft.control.surfaces.
Airport.Location.(ACARS/AFERS) AP
(.1.).Allied.Pilots.Association.. APA
( 2 ) Autopilot Amplifier
Auxiliary.Power.Breaker APB
(.1.).Autopilot.Computer.. APC
(.2.).Aeronautical.Public.Correspondence..
(.3.).Aeronautical.Passenger.Communication
Application.Programming.Interface API
Aircraft.Personality.Module APM
Automated.Performance.Measurement.System APMS
ARINC.Packet.Network APN
(.1.).Approach.Control.. APP
(.2.).Autopilot.Panel
Application App
Approach: That segment of flight having to do APPR with final descent and landing.
Actual.Performance.Reserve APR
ATN Profile Requirement List APRL
Autopilot.System APS
Auxiliary.Power.Unit APU
Auxiliary.Power.Unit.Controller APUC
_0
Avionics Qualification Facility AQF
( 1 ) Advanced Qualification Program. AQP
( 2 ) Avionics Qualification Procedure
Aeronautical.Quadrature.Phase.Shift.Keying A-QPSK
Advanced.Quality.System AQS
Aviation.Rule.making.Advisory.Committee ARAC
Arbitrary.Waveform.Generator ARB
Airline.Risk.Factor ARF
Aeronautical.Radio,.INCorporated:.Corporation.in. ARINC
which.the.U.S..scheduled.airlines.are.the.major.
stockholders.
-XXX Digital database protocols defined by ARINC
ARINC.committee.
Area.Regional.Maintenance.Center ARMC
(.1.).Aeronautical.Recommended.Practice... ARP
(.2.).Air.Data.Reference.Panel..
(.3.).Airport.Reference.Point:.Point.in.space.
based.on.a.particular.altitude,.waypoint.and/or.
offset..The.FMS.makes.calculations.to.guide.the.
aircraft.to.that.particular.point.
Advanced.Research.Projects.Agency ARPA
Airport ARPT
Arrival ARR
Automated.Radar.Summary.chart...These.are. ARS
hourly.generated.charts.showing.location.and.
intensity.of.radar.echoes.
Air.Route.Surveillance.Radar ARSR
Automatic.Reserve.Thrust ART
Adaptive Radar Threshold Techniques ARTT
Air-Route Traffic Control Center. Approximately ARTCC
20 centers cover the air traffic routes in the
United.States.using.numerous.radars.and.radio.
communication.sets.
Automated.Terminal.Radar.System ARTS
Audio.Reproducer.Unit ARU
__
(.1.).Aircraft.Separation.Assurance. ASA
(.2.).Autoland.Status.Annunciator.(AFDS)
AC.RS.System.Access.Approval.(AEEC) ASAA
Aviation.Safety/Accident.Prevention ASAP
Aircraft.Separation.Assurance.System.(AEEC) ASAS
American.Standard.Code.for.Information. ASCII
Interchange
Air.Supply.and.Cabin.Pressure.Controllers ASCPC
Aircraft.Situation.Display ASD
Airport Surface Detection Equipment ASDE
Aeronautical.Satellite.Data.Link ASDL
Altimetry.System.Error ASE
Agency.for.the.Security.of.Aerial.Navigation.in. ASECNA
Africa.and.Madagascar
Altitude Select: An autopilot flight/director mode. ASEL
ARINC.Signal.Gateway ASG
(.1.).Avionics.System.Integration.. ASI
(.2.).Airplane.Systems.Integrator
Application Specific Integrated Circuit ASIC
Avionics.System.LAN.Switch ASLS
(.1.).Airspace.Management.. ASM
(.2.).Autothrottle.Servo.Motor.. ( 3 ) Avionics Specific Module .
( 4 ) Application Specific Module
Abstract Syntax Notation One ASN._
Automated Surface Observing System ASOS
(.1.).Altitude.Set.Panel.. ASP
(.2.).Aeronautical.Fixed.Service.(AFS).Systems.
Planning.for.data.interchange
Aeronautical.Fixed.Service.(AFS).Systems. ASPP
Planning.for.data.interchange.Panel
Advanced.Surface.Movement.Guidance.and. A-SMGCS
Control.Systems
Airport.Surveillance.Radar ASR
__
Aviation.Safety.Reporting.System ASRS
Airborne.Surveillance.and.Separation.Assurance. ASSAP
Processing
Aerospace.Simulation.and.Systems.Test.Center ASSTC
Airspace.System.Task.Force ASTF
(.1.).Avionics.Switching.Unit.. ASU
( 2 ) Application Specific Unit
Advanced.Super.View ASV
Alternate.Source.Selection.Valve ASSV
Airport Surface Traffic Automation ASTA
( 1 ) Air Traffic . AT
(.2.).Air.Transport
Auto.throttle A/T
(.1.).Actual.Time.of.Arrival. ATA
(.2.).Air.Transport.Association
Air Traffic Control ATC
Air Traffic Control Association ATCA
Air Traffic Control Center ATCC
Air Traffic Control Radar Beacon System ATCRBS
Air Traffic Control Signaling System .A system ATCSS
to.provide.information.between.the.pilot.and.air.
traffic control using the VHF communications
transceiver.in.conjunction.with.data.link.
equipment.
Actual.Time.of.Departure ATD
Automatic Test Equipment ATE
Air Traffic Flow Management ATFM
Autothrust.System ATHR
Automatic.Target.Handoff.System ATHS
Instrument.Size.Unit.of.Measure ATI
( 1 ) Air Traffic Information Service. ATIS
(.2.).Automatic.Terminal.Information.Service.
(.3.).Automatic.Terminal.Information.System
Abbreviated.Test.Language.for.Avionics.Systems ATLAS
_3
( 1 ) Air Traffic Management . ATM
(.2.).Asynchronous.Transfer.Mode.
Air Traffic Management Concept Panel (ICAO) ATMCP
Aeronautical.Telecommunications.Network ATN
Aeronautical.Telecommunication.Network.Panel ATN P
Acceptance.Test.Procedure.(Air.Transport) ATP
Air.Transport.Racking ATR
( 1 ) Air Traffic Services . ATS
(.2.).Air.Turbine.Starter..
(.3.).Auto.throttle.System..
(.4.).Air.Transport.System
Air Traffic Service Communication ATSC
Air Traffic Services Geographic Filter ATSGF
Air Traffic Services Message Processor ATSM
Air Traffic Services Unit ATSU
Attitude ATT
Airspace User Operations AUO
Automatic AUTO
Mechanism.that.automatically.tilts.the.weather. AUTOTILT
radar.
Auxiliary AUX
Audio-Visual AV
Available AVAIL
Aviation.Electronics:.Any.group.of.aircraft. AVIONICS
electronic.devices.
Avionics.Local.Area.Network AVLAN
Aviation.VHF.Link.Control AVLC
Airborne.Vibration.Monitor AVM
Aerodrome Visibility Operational Level AVOL
Aviation.Packet.Communication AVPAC
Airborne.Warning.and.Control.System AWACS
Automated.Weather.Advisory.Station AWAS
American.Wire.Gauge AWG
_4
Aviation.Weather.Information AWIN
Advanced.Weather.Interactive.Processing. AWIPS
System
Audio.Warning.Mixer AWM
All Weather Operations AWO
All Weather Operations Panel AWOP
Automated Weather Observation System. A AWOS
system.that.gathers.surface.weather.information. and transmits the information to the pilot via VOR,
Comm Freq or telephone lines.
Azimuth:.Distance.in.degrees.measured. AZ
clockwise.from.North.
At or Below (Altitude suffix) B
An.approach.from.the.end.of.the.runway.opposite. BACKCOURSE
the.front.localizer..Normally.in.this.type.of.
approach,.there.is.no.glideslope.available.
The.difference.between.the.highest.and.lowest. Bandwidth
frequency components of a signal.
Basic.Area.Navigation B-RNAV
Bank.Angle.Protection BAP
Barometric BARO
Pressure.altitude-corrected.local.barometric. Baron-
pressure. Corrected
Altitude
Type.B.Application.to.Application.Protocol BATAP
Back.Azimuth:.Same.concept.as.Backcourse. BAZ
except,.the.pilot.uses.the.Microwave.Landing.
System.(MLS)..An.MLS.BAZ.transmitter.on.the. ground is required.
Base.Band BB
Backcourse B/C
Binary.Coded.Decimal..A.coding.system.in.which. BCD
each.digit.from.0.to.9.is.represented.by.a.four.bit.
binary.number.
Back.Course BCRS
__
Block Check Sequence. BCS is a cyclic code that BCS
is.used.as.reference.bits.in.an.error.detection.
process.
[email protected] bCSU
Bearing.Distance.Indicator BDI
Business.Data.Management.and.Invoicing BDMIS
The.beam.width.is.the.width.of.the.beam.as. Beam Width
measured.at.the.half-power.points.of.the.radiated.
signal.(WXR).
The.direction.of.a.point.or.navigational.aid. Bearing
measured.clockwise.from.a.reference.through.
360°.
Boeing.Electronic.Delivery.System BEDS
Below BEL
Back-End.Processor BEP
Back-End.Processor.Management.System BEPMS
Bite.Error.Rate BER
Buyer Furnished Equipment BFE
Beat Frequency Oscillator. An oscillator that BFO
produces.a.signal.to.be.mixed.with.the.received. frequency to produce an audible beat note, for
the purpose of decoding the Morse code identifier
of an NDB. The oscillator produces frequencies
equal to the sum and difference of the combined
frequencies.
Broadband.Global.Area.Network BGAN
Bus.Grant.Inhibit..A.term.used.in.CAPS.transfer. BGI
bus.processing.
Border.Gateway.Protocol BGP
Burn-In BI
Bilingual.Ground.Station.(ACARS.and.VDML2) BiGS
Base-2.counting.system..Numbers.include.0,1. Binary
Boundary.Intermediate.System BIS
BIS.Management.System BISMS
_6
Built-In.Self.Test BIST
A.binary.digit..Smallest.data.unit.in.a. Bit
microprocessor.system.
Built-In-Test BIT
Built-In-Test Equipment BITE
Black.Label BL
(.1.).Black.. BLK
(.2.).Block
Bezel.Light.Sensor BLS
Brake.Metering.Valve BMV
Binary BNR
Boundary Notification System (Squitters) BNS
Bottom.of.Climb BOC
Bill.of.Material BOM
Bit Oriented Protocol BOP
The.process.of.aligning.a.directional.antenna. Boresighting
system.
(.1.).BITE.Processor.. BP
(.2.).Bottom.Plug
Bus.Power.Control.Unit BPCU
bites.per.second bps
Bytes.per.second Bps
Binary.Phase.Shift.Keying BPSK
Bridge BR
Bearing BRG
Basic.Rate.Interface BRI
Basic.Area.Navigation BRNAV
Business.&.Regional.Systems BRS
Brightness BRT
Brake.System.Control.Unit BSCU
Backbone.Subnetwork BSN
Board.Support.Package BSP
__
(.1.).Beam.Steering.Unit.. BSU
(.2.).Bypass.Switch.Unit
Bus.Tie.Breaker BTB
Brake.Temperature.Monitor.Unit BTMU
British.Thermal.Units BTU
Backup.WAN BWAN
A.grouping.of.eight.bits. Byte
Celsius. C
Command.and.Control C&C
Control.and.Warning C&W
Civil.Aviation.Authority..A.regulatory.agency.in.the. CAA
United.Kingdom.
Civil.Aviation.Administration.of.China CAAC
Caution.Advisory.Computer CAC
( 1 ) Course Acquisition Code . C/A Code
( 2 ) GPS Course Acquisition Code
Cabin.Area.Control.Panel CACP
(.1.).Computer.Aided.Design. CAD
(.2.).Combiner.Alignment.Detector
Communications.Automation.and.Data.Link CADAG
Component.Application.Engineer CAE
Crew.Alerting.Function CAF
Commercial.Avionics.GPS.Engine CAGE
Cabin.Attendant.Handsets CAH
Caution.Annunciator.Indicator CAI
Corrected.for.instrument.errors.and.errors.due. Calibrated
to.position.or.location.of.the.pressure.source..At. Airspeed
standard sea level conditions, CAS is equal to
true.airspeed.(TAS).
A.variation.of.the.SELCAL.system.in.which.the. CALSEL
SELCAL.signal.is.combined.with.a.special.gating.
toe.to.produce.an.automatic.function.by.the.
receiver..This.system.is.only.a.proposal.and.not.
yet.implemented.
__
Calibration Verification CALVER
(.1.).Computer.Aided.. CAM
(.2.).Cockpit.Area.microphone..
(.3.).Manufacturing
Constant.Angle.Non-Precision.Approach CANPA
Captain CAPT
Chinese.Aeronautical.Radio.Electronics.Research. CARERI
Institute
An.ac.signal.that.can.be.modulated.by.changing. Carrier
the amplitude, frequency or pulse of the signal.
(.1.).Collision.Avoidance.System.. CAS
(.2.).Computed.Airspeed..
(.3.).Crew.Alerting.System..
(.4.).Collins.Aviation.Services
Computer.Aided.Software.Engineering CASE
(.1.).Categories.(I,.II,.III).for.Visibility. CAT
Requirements .
(.2.).Clear.Air.Turbulence..
(.3.).Computer.Aided.Testing
Operational performance Category I. An ILS CAT I
facility.providing.operation.down.to.a.60-meter.
(200.feet).decision.height.and.with.runway.visual.
range.not.less.than.800.meters.(2600.feet).and.a.
high.probability.of.approach.success.
An.ILS.Approach.to.lower-than-standard.Category. CAT I Enhanced
I.and.in.some.cases.to.Category.II,.minimums,.
based.on.guidance-to-touchdown.provided.by.a.
Category.III-capable.Head-up.Guidance.System,.
per FAA Order 8400.13.
Operational performance Category II. An ILS CAT II
facility.providing.operation.down.to.a.30-meter.
(100.feet).decision.height.and.with.runway.visual.
range.not.less.than.400.meters.(1200.feet).and.a.
high.probability.of.approach.success.
_9
Operational performance Category III a. An ILS CAT III a
facility.providing.operation.with.no.decision.height.
limit.to.and.along.the.surface.of.the.runway.with.
external visual reference during final phase of
landing.and.with.a.runway.visual.range.of.not.less.
than.200.meters.(700.feet).
Operational performance Category III b. An ILS CAT III b
facility.providing.operation.with.no.decision.height.
limit.to.and.along.the.surface.of.the.runway.
without.reliance.on.external.visual.reference;.and. subsequently taxiing with external visual range of
not.less.than.50.meters.(150.feet).
Operational performance Category III c. An ILS CAT III c
facility.providing.operation.with.no.decision.height.
limit.to.and.along.the.surface.of.the.runway.and.
taxiways.without.reliance.on.external.visual.
reference.
Clear.Air.Turbulence.Enhanced.Vision.System CATEVS
The frequency range between 4,000 and 8,000 C-BAND
MHz.
Continuous.Built-In-Test CBIT
Computer-Based.Training CBT
C-Check CC
Circuit.Card.Assembly CCA
( 1 ) Configuration Control Board . CCB
(.2.).Converter.Circuit.Breaker
(.1.).Charged.Coupled.Device. CCD
(.2.).Cursor.Control.Device
International.Radio.Consultative.Committee CCIR
Consultative.Committee.International.Telephone. CCITT
and.Telegraph
Common.Computing.Module CCM
Content.Compilation.Management.System. CCMS
Common.Computing.Resource CCR
_0
(.1.).Cabin.Communication.System.. CCS
(.2.).Common.Communication.System..
(.3.).Common.Core.System
Control.and.Compensation.Unit CCU
Counterclockwise CCW
(.1.).Carrier.Detect.. CD
(.2.).Chrominance.Difference.
(.3.).Compact.Disc
(.1.).Coordinating.Design.Authority. CDA
(.2.).Continuous.Descent.Arrival
Cabin.Data.Bus.Repeater CDBR
Configuration Database Generator CDG
Course.Deviation.Indicator CDI
Cabin.Discrepancy.Log CDL
Collaborative.Decision.Making CDM
Code.Division.Multiple.Access CDMA
Collaborative.Decision.Making.System CDMS
(.1.).Canadian.Domestic.Network.(VHF.ACARS).. CDN
(.2.).Common.Data.Network
Continuous.Data.Program CDP
Critical.Design.Review CDR
Compact Disc Read-Only Memory CD-ROM
(.1.).Cabin.Distribution.System. CDS
(.2.).Common.Display.System
Cockpit Display of Traffic Information CDTI
Control.Display.Unit:.An.input.control/display. CDU
usually.part.of.a.Flight.Management.System.
(FMS).
Conference.Europèene.des.Postes.et. CEPT
Telècommunications
Cabin Equipment Software CES
Checklist.Entry.Unit CEU
Change.Field CF
Central.Fault.Display.Interface.Unit CFDIU
__
Centralized.Fault.Display.System CFDS
Controlled.Flight.Into.Terrain CFIT
Cubic.Feet.per.Minute cfm
Central.Flow.Management.Unit CFMU
Cabin.File.Server CFS
Center.of.Gravity CG
Connecting.Gate.Information CGI
Channel CHAN
(.1.).Change.. CHG
(.2.).Charge
Computer.Human.Interface CHI
Center.Hydraulic.Isolation.System CHIS
Collins High Order Language CHOL
Course.Heading.Panel CHP
(.1.).Cabin.Interphone.. CI ( 2 ) Configuration Item
Category.Interaction.Diagram CID
Checklist.Input.DataBase CIDB
Common ICAO Data Interchange Network CIDIN
Cabin.Interphone.Distribution.System CIDS
Commission.Internationale.de.I.Eclairage CIE
Common Input/Output CIO
(.1.).Corporate.Information.System.. CIS
(.2.).Crew.Information.System
Configurable Integrated Surveillance System CISS
Check CK
Checklist CKLST
(.1.).Climb.. CLB
(.2.).Closed-Loop.Boolean
Clock CLK
Connectionless.Network.Protocol CLNP
Connectionless.Network.Service CLNS
__
Water.or.ice.particles.having.radii.smaller.than. Cloud Droplets
0.01.cm
Control.Law.Processor CLP
Clear CLR
Connectionless.Mode.Transport.Protocol CLTP
(.1.).Context.Management.. CM
( 2 ) Configuration Management.
( 3 ) Conflict Management
(.1.).Central.Maintenance.Application.. CMA
(.2.).Contract.Maintenance.Agreement
Central.Maintenance.Computer CMC
Central.Maintenance.Computer.Function CMCF
Central.Maintenance.Computer.System CMCS
Command CMD
(.1.).Common.Message.Format.. CMF
(.2.).Communication.Management.Function
(.1.).Common.Mode.Monitor..A.type.of.monitor. CMM
common to automatic flight control systems. .
(.2.).Component.Maintenance.Manuals.
Control.Motion.Noise CMN
Configuration Management Plan CMP
Cabin.Management.System CMS
Complementary Metal Oxide Semiconductor CMOS
Commercial.Mobile.Radio.Service.. CMRS
(cellular.phone.network)
Communications.Management.Unit CMU
Customized.Navigation.Database CNDB
Centre.national.d’etudes.spatiales CNES
Carrier-to-Noise.Density.Ratio C/NO
Comm/Nav/Pulse CNP
Communication,.Navigation,.Surveillance CNS
Communication,.Navigation,.Surveillance/Air. CNS/ATM
Traffic Management
_3
A.track.that.is.continued.based.on.previous.track. Coasted Track
characteristics.in.the.absence.of.surveillance.data.
reports.(TCAS).
Coder/Decoder CODEC
Combiner Optical Element COE
Cockpit Operating Manual COM
Communications /Meteorological /Operations COM/MET/OPS
Communications COMM
Communication Of Modification Plan COMP
A.low-powered.radio.beacon,.used.in.conjunction. Compass
with.ILS..A.compass.locator.has.a.two-letter. Locator
identification and a range of at least 15 miles.
Compressor COMP
Continuous CON
An.inverted.conical.shaped.area.extending. Cone of
vertically above a VOR ground facility that is void Confusion
of.the.bearing.signal.
Concept of Operations CONOPS
A low-frequency, keyed, CW, short baseline Consolan
system.using.two.antennas.to.radiate.a.daisy-
shaped.pattern.for.navigational.aid.purposes..The. frequency range is in the 300 kHz region . It is in
limited.use.today.
Contouroriso.–.contour.refers.to.a.weather.radar. Contour
display.presentation.that.blanks.the.echo.returns.
in.the.center.of.a.storm.cell..The.area.blanked.out.
is.called.contour.and.corresponds.to.the.return.
levels.that.exceed.a.predetermined.threshold.
Continental.United.States CONUS
Character-Oriented Protocol COP
Communities.of.Practice COPs
Common.Reusable.Elements CoRE
Company.Route COROUTE
_4
A.correction.is.applied.to.static.source.pressure. Correction
measurements.to.partly.or.completely.correct. (SSEC)
for pressure errors that are caused by airflow
changes..It.is.computed.as.a.function.of.Mach.
and.altitude.based.on.measured.errors.for.a.
particular.static.system.
A.resolution.advisory.that.instructs.the.pilot.to. Corrective
deviate from current vertical rate (e. g. DON’T Advisory
CLIMB.when.the.aircraft.is.climbing)..(TCAS)
Checklist Operational Software COS
Connection Oriented Transport Protocol COTP
Commercial Off-The-Shelf COTS
(.1.).Circular.Polarization.. CP
( 2 ) Conflict Probe .
(.3.).Control.Panel
Closest.Point.of.Approach CPA
Collins.Portable.Access.System CPAS
(.1.).Cabin.Pressure.Controller.. CPC
(.2.).Controller.Pilot.Communication..
(.3.).Cursor.Position.Control
Compact.Peripheral.Component.Interconnect cPCI
Computer Program Configuration Item. A CPCI CPCI
number identifies the configuration of a computer
software.program.
Cabin.Pressure.Control.System CPCS
Controller-Pilot.Data.Link.Communications CPDLC
Circular.Position.Error CPE
(.1.).Core.Processor.Module.. CPM
(.2.).Crash.Protected.Memory
Collins.Part.Number CPN
Common.Processing.Resource CPR
Compressor CPRSR
Cabin.Pressure.Sensor CPS
Contractor.Purchasing.System.Review CPSR
Central.Processing.Unit CPU
__
Command/Response C/R
( 1 ) Change Request . CR
(.2.).Contrast.Ratio
(.1.).Cyclic.Redundancy.Checking.. CRC
(.2.).Cyclic.Redundancy.Code
Corrosion.Resistant.Steel CRES
Current.Routing.Domain CRD
Cooperative.Research.and.Development. CRDA
Agreement
(.1.).Cockpit.Resource.Management.. CRM
(.2.).Collision.Risk.Model..
(.3.).Crew.Resource.Management
Controlled.Reception.Pattern.Antenna CRPA
Cutover.Readiness.Review CRR
Course CRS
Cathode.Ray.Tube CRT
Computer.Receiver.Unit CRU
Cruise CRZ
(.1.).Common.Service.. CS
(.2.).Collins.Commercial.Systems.Engineering
Cargo.System.Controller CSC
Computer Software Configuration Item CSCI
Cabin.System.Control.Panel CSCP
Commercial.Standard.Data.Bus CSDB
Cargo.Smoke.Detector.System CSDS
Control.Systems.Electronics.Unit CSEU
Command/Status.Frame CSF
Carrier.Sense.Multiple.Access CSMA
Carrier.Sense.Multiple.Access.with.Collision CSMA/CD
Crash.Survivable.Memory.Modules CSMM
Cabin.System.Management.Unit CSMU
Communications/Surveillance Operational C/SOIT
Implementation.Team
_6
Configuration Strapping Unit: A LRU used to CSU
select.installed.system.features.on.a.particular.
aircraft.
Chromaticity.Tolerance CT
( 1 ) Control Area (ICAO Term) . CTA
(.2.).Controlled.Time.of.Arrival
Common Traffic Advisory Frequency CTAF
Cowl.Thermal.Anti-Icing CTAI
Center.Tracon.Automation.System CTAS
Cabin.Temperature.Controller CTC
Cross.Track.Deviation CTD
Control: Refers to a radio frequency controller CTL
Centralized Air Traffic Flow Management CTMO
Organization
Conventional Take Off and Landing CTOL
(.1.).Center.. CTR
(.2.).Control.zone
Configuration Test Requirements Document CTRD
Control CTRL
Clear.To.Send CTS
Cabin.Telecommunications.Unit CTU
(.1.).Channel.Utilization.. CU
(.2.).Combiner.Unit.(HUD)..
(.3.).Control.Unit
Code/Unit.Test C/UT
Cockpit.Voice.and.Digital.Flight.Data.Recorder CV/DFDR
Cockpit.Voice.Recorder CVR
Cockpit.Voice.Recorder.Control.Panel CVRCP
(.1.).Clockwise.(cw).. CW
(.2.).Continuous.Wave..A.continuous.train.of.
identical.oscillations.
Comparator.Warning.Computer CWC
Continuous.Wave.Interference CWI
__
Comparator.Warning.Monitor CWM
(.1.).Controlled.Working.Position. CWP
(.2.).Controller.Working.Position
Control.Wheel.Steering CWS
Differential.Eight.Phase.Shift.Keying D_PSK
Description and Operation D&O
(.1.).Descent.Advisor.. DA
(.2.).Drift.Angle
Digital-to-Analog D/A
Discrete.Addressable.Beacon.System DABS
Digital.Air.Data.Computer DADC
Digital.Air.Data.System DADS
Digital.Service.Access.Product DAP
Downlink.of.Aircraft.Parameters DAPs
Designated.Airworthiness.Representative-A. DAR
designation.of.authority.by.the.FAA,.authorized.
under.FAR.Part.183,.Subpart.C.
Dynamic.Aircraft.Route.Planning DARP
Direct.Access.Radar.Channel..An.independent. DARC
backup.to.main.ATC.computers.
Defense.Advanced.Research.Projects.Agency DARPA
Dynamic.Aircraft.Route.Planning.Study DARPS
Designated.Alteration.Station:.A.designation.of. DAS
Authority.authorized.by.the.FAA.under.FAR.Part.
21,.Subpart.M.
A.system.that.allows.exchange.of.digital.data.over. Data Link
an.RF.link..ATCSS.is.a.data.link.system.used.by.
the air traffic control system. ACARS is a data
link.system.used.by.airline.command,.control.and.
management.system.,.using.VHF.communication.
frequencies.
Digital.Automatic.Terminal.Information.System D-ATIS
( 1 ) Data Acquisition Unit . DAU
(.2.).DBS.Antenna.Unit
__
Database DB
Decibel dB
Decibels.Adjusted dBA
(.1.).Decibels.above.isotopic.circular. DBi
(.2.).Decibels.referenced.to.an.isotopic.antenna
Downlink Block Identifier DBI
Decibel(s).below.1.milliwatt dBm
Database.Management.System DBMX
Direct.Broadcast.Satellite DBS
Decibels.referenced.to.1.watt DBw
Decibel-Watts dBW
Database.Unit DBU
Direct.Current DC
Display.and.Crew.Alerting.system DCA
Digital.Control.Audio.System DCAS
Demand.and.Capacity.Balancing DCB
Double.Channel.Duplex..A.communication. DCD
system.using.two.RF.channels,.one.channel.for.
receive.and.one.channel.for.transmit.operations,.
for.simultaneous.communication.
Data Communications Equipment DCE
Data.Conversion.Gateway.Function DCGF
Departure.CLearance DCL
Data.Communication.Management.Function DCMF
Data.Communication.Management.System DCMS
(.1.).Design.Change.Notice.. DCN
(.2.).Document.Change.Notice..
(.3.).Drawing.Change.Notice
Display.Control.Panel:.Used.to.operate.modes.of. DCP
EFIS.system.
_9
Double.Channel.Simplex..A.communication. DCS
system.using.two.RF.channels.for.non-
simultaneous communication. One channel
is.disabled.while.the.other.channel.is.used.to.
transmit.
Data.Concentrator.Unit DCU
Directional.Control.Valve DCV
(.1.).Data.Delivery.. DD
(.2.).Data.Dictionary
(.1.).Digital.Differential.Analyzer.. DDA
(.2.).Distance.Data.Adapter
Dual.Disk.Drive DDD
Direct.Dial.Indicator DDI
Decoder.Digital.Interface.Box DDIB
Difference.in.Depth.of.Modulation,.a. DDM
measurement.used.in.conjunction.with.ILS.
signals.
Declarations.of.Design.and.Performance..A. DDP
control document required by the United Kingdom
Civil Aviation Authority (CAA) for certification of
avionics equipment.
Draft.Document.Review DDR
Direct.Digital.Synthesizer DDS
Downlink.Data.Transfer DDT
Data.Link.Delivery.of.Expected.Taxi.Clearances DDTC
Display.Drive.Unit DDU
Design.Eye.Box..The.three.dimensional.volume.in. DEB
space.surrounding.the.Design.Eye.Position.from.
which.the.HUD.information.can.be.viewed.
A.navigation.system.widely.used.by.shipping.in. DECCA
Europe..The.ground.facilities.consist.of.a.master.
station.and.several.slave.stations.
Base-10.counting.system..Numbers.include.0,.1,. Decimal
2,.3,.4,.5,.6,.7,.8,.9.
Dedicated ded
30
Digital Expandable Flight Data Acquisition and DEFDARS
Recording.System
Deflection DEFL
Degree DEG
Delete DEL
An.ACARS.mode.of.operation.in.which. Demand Mode
communications.may.be.initiated.by.the.ground.
processor.or.the.airborne.system.
(.1.).Departure.. DEP
(.2.).Design.Eye.Position..The.position.at.each.
pilot’s.station.from.which.a.seated.pilot.achieves.
the.optimum.combination.of.outside.visibility.and.
instrument.scan.
Designated.Engineering.Representative:. DER
Designation.of.authority.by.the.FAA.authorized.
under.FAR.Part.183,.Subpart.B.
Descent DES
Description DESCR
TCAS.sensitivity.level.(threat.volume).reduction Desensitization
Descent:.An.autopilot.Flight.director.mode. DES
Destination DEST
Deviation DEV
Definition File DF
Direction.Finding.Antenna DFA
Digital.Flight.Control.System DFCS
Digital Flight Data Acquisition Function DFDAF
Digital Flight Data Acquisition Management Unit DFDAMU
Digital Flight Data Acquisition Unit. The DFDAU DFDAU
samples, conditions and digitizes the flight data.
Digital.Flight.Data.Recorder DFDR
Digital.Flight.Data.Unit DFDU
Dual.Function.Interactive.Display.Unit DFIDU
Digital.Flight.Instrument.Unit DFIU
Digital Frequency Select DFS
3_
Digital.Function.Unit DFU
Directional.Gyro:.Mode.of.AHS.operation.that. DG
provides heading data without the benefit of a flux
(AHRS).or.normal.alignment.(IRS).
Direction.Generale.de.l’Avaiation.Civile.(France’s. DGAC
Civil.Aviation.Agency).
Differential.Global.Navigation.Satellite.System DGNSS
Differential.Global.Positioning.System. DGPS
( 1 ) Dataflash Header . DH
( 2 ) Decision Height: Specified height in the
precision.approach.at.which.a.missed.approach. must be initiated if the required visual reference to
continue.the.approach.has.not.been.established.
Data.Interrupt DI
Diagrams DIAGS
Digital.Interface.Box DIB
Data.Item.Description DID
(.1.).Data.Interrupt.Program.. DIP
(.2.).Dual.In-line.Package..The.most.common.
package configuration for integrated circuits.
(.1.).Direct.. DIR
(.2.).Director..
(.3.).Direction
A.DME.operating.mode.that.allows.an.FMCS.to. Directed Mode
select one to five DME stations for interrogation.
Direct.Intercept DIR/INTC
Disconnect DISC
Discharge DISCH
Discrepancy DISCR
A.general.term.for.a.single.wire.signal.that.is. DISCRETES
either.off.or.on.
Display DISP
Distance DIST
Data.Information.Transfer.System DITS
3_
(.1.).Data.Link.. DL
(.2.).Downlink
Data.Link.Application.Processor DLAP
Data.Link.Control.Display.Unit DLC
Data Link Control Identifier DLCI
Data.Link.Entity DLE
Data.Load.Gateway.Function DLGF
Data.Link.Interpreter.program DLI
Data.Link.(AEEC) DLK
(.1.).Data.Link.Library.. DLL
(.2.).Dynamic.Link.Library
Data.Link.Management.Unit DLM
Data.Link.and.Message.Engineering DLME
Data.Loader/Mass.Storage.Unit DL/MSU
Duct Leak and Overheat Detection DLODS
Data.Link.Processor DLP
Data.Load.System DLS
Data.Link.Service.Provider DLSP
Digital.Lineal.Tape-used.for.the.storage.of.video. DLT
and audio files
Download.Unit DLU
Disconnected.Mode DM
Direct.Memory.Access DMA
Distance Measuring Equipment. A system that DME
provides.distance.information.from.a.ground.
station.to.an.aircraft.
Abbreviation.for.a.DME.normal.system DME/N
Abbreviation.for.a.DME.precision.system DME/P
In.this.mode,.the.DME.scans.from.0.mile.to. DME Search
the.outer.range.for.a.reply.pulse.pair.after.
transmitting.an.interrogation.pulse.pair.
Data.Management.Function DMF
33
Designated.Manufacturing.Inspection. DMIR
Representative
(.1.).Data.Memory.Module.. DMM
(.2.).Digital.Multimeter
Data.Multiplexing.Network DMN
Debris.Monitoring.Sensor DMS
Data.Management.Unit DMU
RTCA.Document.160,.Environmental.Conditions. DO-_60
and Test Procedures for Airborne Equipment,
Issued.12/04/89
RTCA.document.178,.Software.Considerations.in. DO-___ Airborne Systems and Equipment Certification,
Issued.03/22/85
Delegation Option Authorization: A delegation of DOA
authority.authorized.by.the.FAA.under.FAR.Part.
21,.Subpart.J.
Documentation DOC
Data Over Cable Service Interface Specifications DOCSIS
Department.of.Defense DOD
Dynamic Object Orientated Requirements System DOORS
The change in frequency observed at the receiver Doppler Effect
when.the.transmitter.and.receiver.are.in.motion.
relative.to.each.other.
Disk Operating System DOS
Department.of.Transportation DOT
Dynamic Ocean Tracking System DOTS
The.radio.transmission.path.downward.from.the. Downlink
aircraft.to.the.earth.
Departure.Procedures DP
Boeing.Engineering.Process.Council.Display. DPAT
Process.Action.Team
Digital.Passenger.Control.Unit DPCU
dots.per.inch Dpi
Decision.Point.Process DPP
34
Dual.Port.RAM DPR
Differential.Phase.Shift.Keying DPSK
Digital.Quartz.Gyro DQG
(.1.).Data.Reconing.. DR
(.2.).Data.Receptacle..
(.3.).Dead.Reckoning:.The.worst.degraded.
mode.of.FMS.navigation..DR.is.displayed.when.
no.raw.position.data.is.received.by.the.FMS.for.
a.set.time.delay..In.such.situations,.position.is.
computed.by.monitoring.speed.and.direction.
since.last.known.position.
Designated.Radio.Engineering.Representative. DRER
(FAA)
The.angle.between.heading.and.track..It.is.due.to. Drift Angle
the.effect.of.wind.currents..Sometimes.called.the.
crab.angle.
Document.Release.Notice DRN
Digital.Service.Access.Device DSAD
Defense System Acquisition Review Cycle DSARC
Double.Side.Band..An.AM.signal.with.the.carrier. DSB
removed. Requires the same bandwidth as the
AM.signal.
Data.Signal.Display.Unit DSDU
Display.System.Function DSF
(.1.).Digital.Signal.Processor.. DSP
(.2.).Display.Select.Panel.. ( 3 ) Domain Specific Part
Display.Driver DSPDRV
Display.(annunciation.on.CDU) DSPY
Display.System.Replacement DSR
Decision.Support.Systems DSS
Direct Sequence Spread Spectrum DSSS
Decision.Support.Tool DST
(.1.).Data.Signaling.Unit.. DSU
(.2.).Domain.Service.Unit
3_
Design.To.Cost DTC
(.1.).Data.Terminal.Display.. DTD
( 2 ) Document Type Definition
Data Terminal Equipment DTE
Development.Test.and.Evaluation DT&E
Distance-to-go DTG
Desired.Track DTK
Dual Tone Multi-Frequency DTMF
Demonstration.Test.Milestone DTM
Data.Protocol.Data.Unit DTPDU
Data.Transfer.Unit DTU
Display.Unit DU
An.airborne.DMERT.capable.of.processing.. Dual Mode DME
DME/N.and.DME/P.ground.station.signals..
Operation is in the L-band frequency range.
Direct.User.Access.Terminal DUAT
A.communication.operation.that.uses.the. Duplex
simultaneous.operation.of.the.transmit.and. receive equipment at two locations.
Demonstration.and.Validation.Facility DVF
Digital.Visual.Interface DVI
Digital.Voltmeter DVM
Direct.WAN DWAN
Distance DX
Dynamic.Pressure.is.the.difference.between.pitot. Dynamic
and.static.pressure. Pressure
RAM.constructed.of.capacitor.elements..Memory. Dynamic RAM
cells.must.be.periodically.refreshed.to.keep.
capacitors.from.discharging.and.losing.data...
(See.“Static.RAM”).
(.1.).East.. E
(.2.).Elevator
Experimental.Aircraft.Association EAA
Electronic.Attitude.Director.Indicator EADI
36
Enhanced.Airborne.Flight.Recorder EAFR
Engine.Anti-Ice EAI
Engine.Alert.Processor EAP
Electrically Alterable ROM EAROM
Engineering.Activity.Reporting.System EARS
En.route.Automated.Radar.Tracking.System EARTS
Equivalent Airspeed EAS
Europeon.Aviation.Safety.Agency EASA
Enhanced.ATM.and.Mode.S.Implementation.in. EASIE
Europe
European Air Traffic Control Harmonization and EATCHIP
Integration.Programme
European Air Traffic Management Systems EATMS
European.Business.Aviation.Convention.and. EBACE
Exhibition
Event.Criterion EC
European.Civil.Aviation.Conference ECAC
Electronic.Caution.Alert.Module ECAM
Enhanced.ACARS ECARS
Earth-Centered,.Earth-Fixed ECEF
The portion of the radiated energy reflected back Echo
to.the.antenna.from.the.target.(WXR).
Electronic.Checklist ECL
Electronic.Control.Module ECM
Electronic.Component.Management.System ECMP
Economy.(minimum.cost.speed.schedule) ECON
EICAS.Control.Panel ECP
(.1.).Engineering.Compiler.System..An.automated. ECS
data.storage.system...
(.2.).Environmental.Control.System.. ( 3 ) Event Criterion Subfield
Left.Environmental.Control.System.Card ECSL
ECS.Miscellaneous.Card ECSMC
3_
Right.Environmental.Control.System.Card ECSR
(.1.).EICAS.Control.Unit.. ECU
(.2.).Electronic.Control.Unit..
(.3.).External.Compensation.Unit
EICAS.Display ED
End-of-Descent E/D
Electronic.Design.Automation EDA
Error.Detection.and.Correction.(used. EDAC
interchangeably.with.EDC)
Error.Detection.and.Correction EDC
Electronic.Document.Distribution.Service EDDS
Electronic.Digital.Flight.Control.System EDFCS
Engine.Data.Interface EDI
Engine.Data.Interface.Function EDIF
Engine.Data.Interface.Unit EDIU
Electronic.Data.Management.System EDMS
(.1.).Electronic.Data.Processing.. EDP
(.2.).Engine.Driven.Pump..
(.3.).Engineering.Development.Pallet
Electronic.Display.Unit EDU
Electronic.Data.Services EDS
Electronics Equipment (e.g. EE-Bay) EE
Electronic.Engine.Control EEC
Electrical Erasable Programmable Read Only EEPROM
Memory
ELMS.Electronics.Unit EEU
Electronic.Flight.Bag EFB
Expected.Further.Clearance EFC
Electronic.Flight.Display EFD
Expanded.Flight.Data.Recorder EFDR
Electronic.Flight.Instrument.Controller EFIC
Electronic.Flight.Instrument.Processor EFIP
Electronic.Flight.Instrument.System EFIS
3_
EFIS.Control.Panel EFISCP
Enhanced.Flight.Vision.System EFVS
Expedited.Ground.Initiated.Handoff EGIHO
Evolved.Expendable.Launch.Vehicle EELV
European Geostationary Navigation Overlay EGNOS
System
Exterior.Gateway.Protocol EGP
Enhanced.Ground.Proximity.Warning.System EGPWS
Exhaust.Gas.Temperature EGT
Electronic.Horizontal.Situation.Indicator EHSI
Electro-Hydraulic.Valve EHV
Engine.Indication EI
Electronic.Industries.Association EIA
Engine.Indication.and.Crew.Alert.System:.System. EICAS
that.combines.engine.parameters.and.aircraft.
system.status.
Engine.Indication.and.Crew.Alert.System.Controls EICASC
Extended Initial Protocol Identifier EIPI
Earth.Incident.Radiated.Power EIRP
(.1.).Electronic.Instrument.System.. EIS
(.2.).Engine.Indication.System..
(.3.).Entry-In-Service
Extended.Industry.Standard.Architecture EISA
EFIS/EICAS.Interface.Unit EIU
Electronic.Logbook.and.Fault.Correction.Guide EL/FCG
Electronic.Logbook.In-Service.Evaluation ELB/ISE
Emitter.Coupled.Logic ELC
Electrical ELEC
Elevation ELEV
Extended.Length.Message ELM
Electrical.Load.Management.System ELMS
Electronic.Library.System ELS
39
Emergency.Locator.Transmitter ELT
Element.Manager EM
(.1.).Electromagnetic.Compatibility. EMC
(.2.).Entertainment.Multiplexer.Controller
Emergency EMER
Emergency EMG
Electro-Magnetic.Interference EMI
(.1.).Emergency.Medical.Services.. EMS
(.2.).Engine.Management.System
Engine ENG
Engineering Network Operations Center ENOC
Enquire ENQ
En.Route EN RTE
Engine-Out E/O
End Of Day EOD
End Of Message EOM
End Of Text EOT
External.Power EP
External.Power.Contactor EPC
Engine.Propulsion.Control.System EPCS
Electronic.Pilot.Reports E-PIREPS
The.E-Plane.is.the.plane.of.an.antenna.that. E-Plane
contains the electric field. The principal E-Plane
also.contains.the.direction.of.maximum.radiation.
Electrically.Programmable.Logic.Device EPLD
Enhanced.Parallel.Port EPP
Engine.Pressure.Ratio EPR
Erasable Programmable ROM EPROM
Electrical.Power.System EPS
Estimated.Position.Uncertainty EPU
Equipment EQUIP
40
Equivalent Airspeed is a direct measure of the Equivalent
incompressible.free.stream.of.dynamic.pressure. Airspeed
It.is.CAS.corrected.for.compressibility.effects. (EAS)
Echo.Reply.Protocol.Data.Unit ERPDU
European.Regional.Airlines.Association ERA
Engineering.Review.Board ERB
End.Routing.Domain ERD
En.Route.Domain.Infrastructure ERDI
External.Roll.Extrusion ERE
(.1.).Eye.Reference.Point.. ERP
(.2.).Enterprise.Resource.Planning
Echo.Reply.Protocol.Data.Unit ERPPDU
Echo Request Protocol Data Unit ERQPDU
Engine.Relay.Unit ERU
(.1.).End.System.. ES
( 2 ) Extended Squitter
European.Space.Agency ESA
(.1.).Electronic.Situation.Awareness.System. ESAS
(.2.).Enhanced.Situational.Awareness.System
Electronic.Scanning E-Scan
Electrostatic.Discharge ESD
Electrostatic.Sensitive.Devices..Also.known.as. ESDS
ESSD.
COTS Ethernet Switching Equipment ESE
End.System.Hello ESH
Engine.and.System.Indication.Display ESID
Engine.and.System.Indication.System ESIS
Energy.Storage/Control ESR
(.1.).Electronic.Switching.System.. ESS
(.2.).Environmental.Stress.Screening
Electro.Static.Sensitive.Devices..See.also.ESDS. ESSD
Environmental.Stress.Screen.Procedure ESSP
Estimated EST
4_
Environmental.Sensor.Unit ESU
Elapsed.Time ET
Estimated.Time.of.Arrival:.The.estimated.time. ETA
to.arrive.at.some.navigational.position.based.on.
present.position.and.estimated.ground.speed.
(.1.).End.of.Block.(ASC.II/IA5.character).. ETB
(.2.).Engineering.Test.Band
Estimated.Time.of.Departure ETD
Elapsed.Time.Indicator ETI
Elapsed.Time.Measurement ETM
Enhanced Traffic Management System ETMS
Extended Twin Engine Operations ETOPS
Equal Time Point ETP
Expected.Taxi.Ramp.Clearances ETRC
Enhanced.Terminal.Voice.Switch ETVS
(.1.).End.of.Transmission.. ETX
(.2.).Entry.Task.Exit
Enhanced.Upper.Air.Forecast.System EUAFS
External.Uninterruptible.Power.Supply EUPS
European EUR
European.ATN EURATN
European.Transport EURET
European Organization for Civil Aviation EurOCAE
Electronics..A.regulatory.agency.for.avionics.
certification in Europe.
European Organization for the Safety of Air EURO-
Navigation Operations CONTROL
Earned.Value EV
Error.Vector.Magnitude EVM
Enhanced.Vision.System EVS
Executive EXEC
Extension EXT
4_
A probability of occurrence less than or equal Extremely
to 1 x 10^-9 per hour of flight, or per event (e.g. Improbable
takeoff,.landing)..(AMJ.52.1309).
A.probability.of.occurrence.greater.than.1.x. Extremely
10^-9 but less than or equal to 1 x 10^-7 hour of Remote
flight, or per e vent (e.g., takeoff, landing) (AMJ
25.1309).
Fahrenheit F
Final.Approach FA
(.1.).Federal.Aviation.Administration.(U.S.). FAA
(.2.).Federal.Aviation.Authority
FAA.Technical.Center.(U.S.) FAATC
(.1.).Flight.Augmentation.Computer.. FAC
(.2.).Final.Approach.Course
Full.Authority.Digital.Electronic.Control FADEC
Final.Approach.Fix FAF
First.Article.Inspection FAI
System capable of completing the specified Fail Operation
phases.of.an.operation.following.the.failure.of.any. System
single.system.component.after.passing.a.point.
designated.by.the.applicable.safety.analysis.(e.g.,.
Alert.Height).
System.which,.in.the.event.of.a.failure,.causes.no. Fail Passive
significant deviation of aircraft. System
A.single.failure,.should.not:.. Fail Passive
( 1 ) Cause significant displacement of the aircraft (Collins
Autopilot) from.its.approach.path.or.altitude.loss.below.the.
nominal.glidepath...
(.2.).Upon.system.disconnection,.involve.any.out-
of-trim.condition.not.easily.controlled.by.the.pilot... ( 3 ) Cause any action of the flight control system
that.is.not.readily.apparent.to.the.pilot,.either.by.
control.movement.or.advisory.display.
43
(.a.).Fail.safe.means.that.the.structure.has.been. Fail Safe
evaluated.to.assure.that.catastrophic.failure.is.not.
probable.after.fatigue.failure.or.obvious.partial.
failure.of.a.single,.principal.structural.element...
(.b.).Fail.safe.means.that.an.Autopilot.complies.
with the requirements of AC25.1329-1A.
Limited.aircraft.disturbance.for.any.single.fault- Fail Soft
less.than.0.4.in.pitch.and.less.than.5.deg/sec.of. (Collins
Autopilot) roll.rate.
A marker beacon used to provide identification Fan Marker
of.positions.along.airways..Standard.fan.marker.
produces.an.elliptical-shaped.pattern...A.second.
type.produces.a.dumbbell-shaped.pattern.
Future.Air.Navigation.System FANS
Final.Approach.Point FAP
( 1 ) Federal Acquisition Regulation. FAR
(.2.).Federal.Aviation.Regulation
Final.Approach.Segment FAS
Final.Approach.Spacing.Tool FAST
Factory.Acceptance.Test FAT
Fly-By-Light FBL
Fixed Base Operator FBO
Fly-By-Wire FBW
Foot.Candles FC
Functional Configuration Audit FCA
Flight Data Acquisition FCAF
Fibre.Channel-Audio.Video FC-AV
(.1.).Federal.Communications.Commission.. FCC
(.2.).Flight.Control.Computer
Flight.Critical.dc FCDC
Flight Crew Operating Manual FCOM
(.1.).Flight.Control.Panel.. FCP
(.2.).Flight.Control.Processor
(.1.).Flight.Control.System.. FCS ( 2 ) Frame Check Sequence
44
(.1.).Final.Data.. FD
(.2.).Flight.Director..
(.3.).Flight.Dynamics..
(.4.).Forward.Display
Flight Data Acquisition Function FDAF
Flight Data Acquisition Unit FDAU
Flight.Plan.Data.Bank FDB
(.1.).Flight.Detection.Exclusion.. FDE
(.2.).Flight.Deck.Enhancement
Fiber.Distributed.Data.Interface FDDI
Flight.Data.Entry.Panel FDEP
Flight.Deck.Handset FDH
Fault.Detection.and.Isolation FDI
Flight Data Input/Output FDIO
Frequency Division Multiplex. A system where the FDM
messages.are.transmitted.over.a.common.path.
by employing a different frequency band for each
signal.
Frequency Division Multiple Access FDMA
Flight.Data.Processing.System FDPS
Flight.Data.Recorder FDR
Flight.Data.Recorder.System FDRS
Flight.Display.System FDS
Flux.Detector.Unit FDU
Future European Air Traffic Management System FEATS
Forward.Error.Correction FEC
Front.End.Processor FEP
Fuel.Flow FF
Free.Flight.Steering.Committee FFSC
Flight.Guidance.Computer FGC
Flight.Guidance.Panel:.A.LRU.used.for.controlling. FGP
the modes of the flight director.
Flight.Guidance.System FGS
4_
(.1.).Functional.Hazard.Assessment/Analysis.. FHA
(.2.).Fault.Hazard.Assessment
Frequency Hopped Spread Spectrum FHSS
Fault.History.Word FHW
Forwarding.Information.Base FIB
First In , First Out FIFO
Fault.Isolation.Manual FIM
Flight.Information.Region FIR
(.1.).Flight.Information.Service.. FIS
(.2.).Flight.Information.System..
(.3.).Flight.Instrument.System
Flight.Information.Services-Broadcast FIS-B
Position in space, usually on aircraft’s flight plan FIX
(.1.).Flight.Level.(as.in.FL.410.)..This.terminology. FL
is.used.to.describe.aircraft.attitude.when.the.
altimeter.is.set.at.QNE...
(.2.).Foot.Lambert
Flight.Level.180:.The.transition.altitude.(18,000.ft). FL __0
for.the.United.States..At.this.altitude,.the.pilot.sets.
the.barometric.correction.to.standard.atmospheric.
pressure.(29.92.in-Hg).
Flight.Level.Change FLCH
Forward.Looking.Infra-Red FLIR
Flight.Line.Maintenance FLM
Flight FLT
Forward.Looking.Terrain.Avoidance FLTA
Flight.Control FLTCTRL
Flight.Instrument FLTINST
Forward.Looking.Windshear.Radar FLW
( 1 ) Frequency Modulation . FM
(.2.).Flight.Management
Flight.Mode.Annunciator FMA
(.1.).Flight.Director.Control.(FD). FMC
(.2.).Flight.Management.Computer.(FMCS)
46
Flight.Management.Computer.Function FMCF
Flight.Management.Computer.System FMCS
Frequency-Modulated Continuous Wave FMCW
Failure.Mode.and.Effects.Analysis FMEA
Flight.Management.Function FMF
Flight.Mode.Panel FMP
Flight.Management.System FMS
Fuel.Metering.Unit FMU
( 1 ) First Officer . F/O
( 2 ) Fuel/Oil Cooler .
( 3 ) Fiber Optic
Fuel.on.Board FOB
( 1 ) Fuel/Oil Cooler . FOC
( 2 ) Full Operational Capability
Flight Operations Evaluation Board FOEB
Fiber Optic Gyro FOG
Flight Operations Quality Assurance FOQA
Field Of View FOV
(.1.).Flight.Path.Angle.. FPA
(.2.).Focal.Plane.Array
Flight.Path.Acceleration FPAC
Flight Profile Comparator FPC
Field.Programmable.Gate.Array FPGA
Flight.Plan FPLN
Feet.Per.Minute FPM
Flight.Plan.Target.Altitude FPTA
Flight.Path.Vector FPV
Fuel.Quantity.Indicating.System FQIS
Fuel.Quantity.Processor.Unit FQPU
Formal Qualification Review FQR
From FR
Flap.Retract.ion.Altitude FRA
4_
Frame.Relay.Access.Device FRAD
A.pulse.that.is.used.to.mark.the.beginning.or.end. Framing Pulse
of.the.coded.reply.pulses.
Free-Route.Experimental.Encounter.Resolution FREER
A.DME.operating.mode.that.will.provide.distance. Free Scan
data.to.all.DME.ground.stations.within.the.DME. Mode
range (LOS).
Frequency FREQ
The.ability.of.a.receiver-transmitter.to.rapidly.and. Frequency
continually shift operating frequency.
Fault.Reporting.Manual FRM
Frame.Reject FRMR
ILS.approach.made.from.the.end.of.the.runway. FRONT-
for.which.the.localizer.is.calibrated..Uses.both. COURSE
localizer.and.the.glideslope.
Federal.Radionavigation.Plan FRP
Fixed.Reception.Pattern.Antenna FRPA
Frequency FRQ
Flight.Service.Automation.System FSAS
Flight.Standardization.Board FSB
Field.Service.Engineer FSE
Flap.Slat.Electronics.Unit FSEU
Flight.Safety.Foundation FSF
Flight.Service.Station FSS
File.Server.Unit FSU
(.1.).Functional.Test.. FT
(.2.).Feet
Flight.Technical.Error:.The.accuracy.with.which. FTE
the.aircraft.is.controlled.as.measured.by.the.
indicated.aircraft.position.with.respect.to.the.
indicated.command.or.desired.position..It.does.
not.include.blunder.errors.
File.Transfer.Protocol FTP
Fault.Tolerant.Power.Panel FTPP
4_
Flexible.Use.Airspace FUA
Failure.Warning FW
Flight.Warning.Computer FWC
Forward FWD
Flight.Warning.System FWS
Flight.Director/Yaw.Damper.System FYDS
Gallium.Arsenide.Field.Affect.Transistor GaAsFET
(.1.).General.Aviation.. GA
(.2.).Go.Around
Gallium.Arsenide GAAS
Genetic.ATN.Communications.Service GACS
Ground-based.Augmentation.and.Integrity GAIT
General.Aviation.Manufacturers.Association GAMA
Global.Area.Network GAN
Global Air Traffic Management GATM
Ground.Based.Augmentation.System GBAS
Ground-Based.Software.Tool GBST
Gigabyte.(billion.bytes) Gbyte
Ground.Collision.Avoidance.System GCAS
Generator.Circuit.Breaker GCB
Ground.Cluster.Controller.(ACARS) GCC
Global.Component.Information.System GCIS
Generic.Control.Panel.(circuit.card) GCP
Ground.Clutter.Suppression GCS
Generator.Control.Unit GCU
Ground.Data.Link.Processor GDLP
Geometric Dilution Of Precision. A term referring GDOP
to.error.introduced.in.a.GPS.calculation.due.to.
the.positioning.of.the.satellites.and.the.receiver.
Ground.Delay.Program GDP
Graphics.Engine.4 GE4
Generator GEN
49
Geostationary Earth Orbit GEO
Ground.Earth.Station GES
Government Furnished Equipment GFE
General Format Identifier GFI
Gaussian Frequency Shift Keying GFSK
(.1.).Graphics.Generator.. GG
(.2.).Ground-Ground
Graphics.Generator.Module GGM
Ground-Ground Traffic Flow Management GGTFM
Ground-Ground.Router GGR
Global.Positioning.System.Ground.Station GGS
Ground.Handling GH
Gigahertz.(billion.hertz) GHz
Group Identifier GI
GNSS.Integrity.Broadcast GIB
GNSS.Integrity.Channel GIC
Ground-Initiated.Comm-B GICB
Garbage-In Garbage-Out GIGO
Ground.Initiated.Handoff GIHO
(.1.).Ground.Location.(ACARS/AFEPS).. GL
(.2.).Group.Length
The.approach.path.used.by.an.aircraft.during.an. Glidepath
instrument.landing.or.the.portion.of.the.glideslope.
that.intersects.the.localizer..The.glide.path.does.
not.provide.guidance.completely.to.a.touch.down.
point.on.the.runway.
The.vertical.guidance.portion.of.an.ILS.system. Glideslope
GPS.Landing.and.Navigation.System GLNS
GPS.Landing.and.Navigation.Unit GLNU
Global.Navigation.Satellite.System GLONASS
(.1.).GPS/GNSS.Landing.System.. GLS
(.2.).Gun.Laying.System
GPS/GNSS.Landing.Unit GLU
_0
Guidance.Material GM
Ground.Movement.Control GMC
Greenwich.Mean.Time..GMT.is.a.universal.time. GMT
scale.based.upon.the.mean.angle.of.rotation.of.
the.earth.about.its.axis.in.relation.to.the.sun..It.
is.referenced.to.the.prime.meridian.that.passes.
through.Greenwich,.England.
Global.Network.Architecture GMU
Ground GND
Gross.Navigational.Error GNE
GNSS.Navigator.and.Landing.System GNLS
GNSS.Navigator.and.Landing.Unit GNLU
Global.Navigation.Receiver GNR
Global.Navigation.Satellite.System GNSS
Global.Navigation.Satellite.System.Panel GNSSP
GNSS.Navigator.Unit GNU
A.device.that.combines.the.two.signals.from.two. Goniometer
loop.antennas..The.goniometer.(or.resolver). contains two fixed coils and one rotating coil.
The.rotating.coil.is.connected.to.the.ADF.
bearing.indicator.needle.to.indicate.the.relative.
bearing.from.the.aircraft.to.the.NDB.station..
The.mechanical.position.of.the.rotor.represents.
the.bearing.of.the.station,.and.the.position.is.
electrically.transmitted.to.the.RMI.
Grade.of.Service GOS
Government Open Systems Interconnection GOSIP
Profile
Glide.Path.Angle:.The.angle.between.the.ground. GPA
and.the.glidepath..Similar.concept.to.glideslope.
angle.
Global.Positioning,.Air.Data,.Inertial.Reference. GPADIRS
System
Gigabits.per.second Gbps
General.Purpose.Instrument.Bus GPIB
__
General.Purpose.Module GPM
General.Purpose.Processor GPP
(.1.).Global.Positioning.System.(See.NAVSTAR).. GPS
(.2.).Global.Positioning.Satellite
Global Positioning System L1 Frequency GPS L_
Global.Positioning.System.Sensor.Unit GPSSU
Ground.Power.Unit GPU
Ground.Proximity.Warning.Computer GPWC
Ground.Proximity.Warning.System GPWS
Ground.Router GR
Gridded.Binary.(National.Weather.Service.Model. GRIB
Output)
The rate at which a variable quantity increases or Gradient
decreases.
Special.binary.code.used.to.transmit.altitude. Gray Code
data.between.framing.pulses.of.a.transponder.
reply..A.cyclic.code.having.only.one.digit.change.
at.a.time..Used.in.Mode.C.to.transmit.aircraft.
barometric.altitude..Also.known.as.Gilham.code.
A.radio.wave.that.travels.along.the.earth’s. Ground Wave
surface.
Geographic.Reference.Point GRP
(.1.).Glideslope:.Radio.signal.that.provides. GS
vertical.guidance.in.an.instrument.landing...
(.2.).Ground.Speed
Glideslope:.Radio.signal.that.provides.vertical. G/S
guidance.in.an.instrument.landing.
Ground.Station.Controller.(ACARS) GSC
Ground Support Equipment GSE
Ground.Station.Information.Frame GSIF
Global.Systems.Mobile GSM
Ground.Station.Management.System GSMS
Glare.Shield.Panel GSP
Gray.Scale.Voltage(s) GSV
__
Greater.Than GT
General.Terms.Agreement GTA
Data.Link.Ground.Terminal.Computer GTC
General Technical Requirements GTR
Graphic/User.Interface GUI
Graphics.Vector.Engine GVE
(.1.).Gateway.. GW
(.2.).Gross.Weight
Graphical.Weather.Services GWS
A.rotating.device.that.will.maintain.its.original. Gyroscope
plane.of.rotation,.no.matter.which.direct.ion.the.
gyroscope.mount.is.turned.
Hardware.Architecture.Document HAD
Means.there.is.a.thin.black.line.(halo).around. “Halo”
the.symbol.or.character..Haloing.is.used.when.
appropriate.to.allow.characters.and/or.symbols.to.
be.clearly.seen.when.they.are.displayed.against.a.
solid.background.color.(Such.as.the.Sky/Ground).
Highly.Accelerated.Life.Testing HALT
Hot.Air.Management.System HAMS
HGS.Annunciator.Panel HAP
High.Altitude.Route.System HARS
Height.Above.Touchdown HAT
HGS.Computer HC
(.1.).Head-Up.Control.Panel. HCP
(.2.).HGS.Control.Panel
Human.Computer.Interface HCI
Host.Computer.System HCS
HUD.Combiner.Unit HCU
Heavily.Cold.Worked.Pipe.and.Tube.. HCW
(Sean-Free™)
Handbook HDBK
Head.Down.Display HDD
_3
Heading:.The.angular.relation.of.the.longitudinal. HDG
axis.of.the.aircraft.with.respect.to.a.reference..
Magnetic.heading.is.referenced.to.magnetic.
north..True.heading.is.reference.to.true.north.
Heading.Select HDGSEL
Hard.Disk HDISK
Hybrid.Data.Link HDL
High-Level.Data.Link.Control HDLC
High-Level.Data.Link.Control-Balanced HDLC-B
Hybrid.Data.Link.Management.System HDLMS
Horizontal.Dilution.of.Precision HDOP
Inertial.Vertical.Speed HDOT
Hardware.Development.Plan HDP
Altitude.Error HE
The.direction.of.an.aircraft.path.with.respect.to. Heading
magnetic.or.true.north.
High Energy Radio Frequency Interference HERF
( 1 ) High Frequency. The portion of the radio HF
spectrum.from.3.to.30.MHz..HF.communication.
systems.operate.in.the.2.to.30.MHz.portion.of.the.
spectrum...
(.2.).Human.Factors
High-Frequency Data Link HFDL
HF.Data.Modem HFDM
High Frequency Data Radio HFDR
High Frequency Network Protocol Data Unit HFNPDU
High Frequency System HFS
Human.Factor.Study.Group HFSG
HF.Sub.Network.Layer HFSNL
High.Gain.Antenna HGA
Head-Up.Guidance.Computer HGC
(.1.).Head-Up.Guidance.System.. HGS
(.2.).HUD.Guidance.System
_4
Heading.Hold HHLD
High HI
(.1.).Head.Impact.Criteria. HIC
(.2.).Head.Injury.Criteria
Horizontal.Integrity.Limit HIL
(.1.).High.Intensity.Radiated.Field. HIRF
( 2 ) High Intensity Radio Frequency
High.Lift.Control.System HLCS
Higher.Layer.Entity HLE
High.Level.Language HLL
Health.Management HM
Health.Management.Function HMF
Human.Machine.Interface HMI
High Density Metal Oxide Semiconductor HMOS
Height.Monitoring.Unit HMU
Handoff HO
Holding.Pattern HOLD
Hand Over Word HOW
(.1.).High.Pressure.. HP
(.2.).Holding.Pattern
( 1 ) High Power Amplifier . HPA
(.2.).HectoPascal:.A.unit.of.pressure.in.the..
meter-kilogram-second.system..(Hecto=100)..
(1 Pascal=1 Newton per square meter).
hecto.Pascal hPa
High.Pressure.Compressor HPC
The.H-Plane.is.the.plane.in.which.the.magnetic. H-Plane field of the antenna lies. The H-Plane is
perpendicular.to.the.E-Plane.
High-Power.Relay HPR
Pressure.Altitude HPRES
High-Pressure.Shutoff.Valve HPSOV
High-Pressure.Turbine HPT
__
HUD.Projector.Unit HPU
Home.Routing.Domain HRD
Horizontal.Stabilizer.Actuator HSA
Horizontal.Stabilizer.Actuator.Control.Electronics HSACE
High.Speed.Frame.Relay.Service.Access.Device HS-DSAD
Horizontal.Situation.Indicator..An.indicator.that. HSI
displays.bearing,.glideslope,.distance,.radio.
source,.course.and.heading.information.
Hardware.and.Software.Integration.Test HSIT
Heading.Select HSL
High.Stability.Reference HSR
Hot.Standby.Routing.Protocol HSRP
High.Speed.Transceivers HST
Horizontal.Stabilizer.Trim.Actuator HSTA
Highest.Two-way.Channel HTC
Head-Up.Display HUD
High-Voltage.Power.Supply HVPS
Hardware HW
Hardware Configuration Item HWCI
Headwind HWND
Hardware/Software HW/SW
Heat.Exchanger HX
Hydraulic HYD
Hydraulic.Interface.Module HYDIM
Hertz.(cycles.per.second) Hz
Integrated.Information.System I_S
International.Aeronautical.Communications. IACSP
Service.Provider
Interface I/F
International.Alphabet.Number.5 IA_
Integrated.ARINC.Ground.Station IAGS
Internet.Assigned.Number.Authority IANA
_6
Indicated.Angle-of-Attack IAOA
International Council of Aircraft Owners and Pilots IAOPA
Associations
Instrument.Approach.Procedures.Automation IAPA
Integrated.Avionics.Processing.System IAPS
Inverse.Address.Resolution.Protocol IARP
Indicated.Airspeed.is.the.speed.indicated.by. IAS
a.differential.pressure.airspeed.indicator.that.
measures.the.actual.pressure.differential.in.
the.pitot-static.head..It.is.the.actual.instrument. indication for a given flight condition.
IAS Profile: An autopilot/flight director mode that IASP commands the aircraft to fly pre-programmed
airspeed.values.
International.Air.Transport.Association IATA
In.Accordance.With IAW
International.Business.Aviation.Council IBAC
(.1.).Integrated.Circuit.. IC
(.2.).Intercabinet
International Civil Aviation Organization ICAO
(Montreal)
IAPS.Card.Cage ICC
International Civil Certification Authorities ICCA
International.Coordinating.Council.of.Aerospace. ICCAIA
Industries
(.1.).Installation.Control.Drawing. ICD
(.2.).Interface.Control.Drawing.
(.3.).Interactive.Design.Center
Interline.Communications.Manual ICM
Internet.Control.Message.Protocol ICMP
Integrated.Communication.s,.Navigation.and. ICNIA
Identification Avionics
Initial Conflict Probe ICP
Integrated.Communication.Switching.System ICSS
__
Instrument.Comparator.Unit ICU
Identifier ID
Indicator.Display/Control IDC
Integrated.Development.Environment IDE
The.action.of.the.transponder.transmitting.an. Ident
extra pulse along with its identification code (at
the request of a controller).
Initial Domain Identifier IDI
Integrated.Drive.Generator IDG
Integrated.Decision.Making IDM
Initial.Domain.Part IDP
Inter-Domain.Routing.Protocol IDRP
(.1.).Ice.Detection.System.. IDS
(.2.).Integrated.Display.System..
(.3.).Information.Display.System
Interactive.Display.Unit IDU
IAPS.Environmental.Control.Module IEC
Insertion.Extraction.Device IED
Institute.of.Electrical.and.Electronics.Engineers IEEE
Integrated.Engine.Pressure.Ratio IEPR
Interactive.Electronic.Training.Manual IETM
Intermediate Frequency. A frequency to which IF(if)
a.signal.is.shifted.as.an.in-between.step.in.the.
reception.or.transmission.of.a.signal.
International.Federation.of.Airline.Pilots. IFALPA
Association
International Federation of Air Traffic Controllers’ IFATCA
Associations
In-Flight.Entertainment IFE
Integrated.Initial.Flight.Plan.Processing.System IFPS
Instrument.Flight.Rules IFR
International Frequency Registration Board IFRB
Intermediate.Gain.Antenna IGA
__
Standardized.Graphics.Exchange.File IGES
Interagency.Group.on.International.Aviation IGIA
Integrated.Ground.Software IGS
Inlet.Guide.Vane IGV
Independent.Landing.Monitor ILM
Instrument.Landing.System..The.system.provides. ILS
lateral,.a.long-course.and.vertical.guidance.to.
aircraft.attempting.a.landing.
Inner.Marker.Beacon:.When.present,.MB.used. IM
in.conjunction.with.ILS,.intercepts.glideslope.
approximately.100.feet.above.touchdown.
Integrated.Modular.Avionics IMA
Integrated.Mission.Avionics.System IMAS
Instrument.Meteorological.Conditions IMC
Implementation.Management.Group IMG
Imbedded Message Identifier IMI
I’m Okay IMOK
Impact.Avalanche.and.Transmit.Time..This. IMPATT Diode
type.of.diode,.when.mounted.in.an.appropriate.
cavity,.produces.microwave.oscillations.and. amplification.
Integrated.Master.Schedule IMS
(.1.).Inertial.Measurement.Unit.. IMU
(.2.).IF.Multiplexer.Unit.In.Inch
(.1.).Inboard.. INBD
(.2.).Inbound
Indicator IND
The.altitude.above.mean.sea.level.(uncorrected. Indicated
for.temperature). Altitude
Information.Frame INFO
Inches.of.Mercury in.hg.
Initialization INIT
Injection INJ
International Maritime Satellite Organization INMARSAT
_9
Inoperative;.not.working. INOP
Interphone INPH
Inertial.Navigation.System..A.self-contained,. INS
dead-reckoning.system.that.senses.the.
acceleration.along.the.three.axes.of.the.aircraft.
and.calculates.the.distance.traveled.from.
a.reference.point..Accuracy.of.the.system.
decreases.with.respect.to.time.
Instrument INST
Intercept INTC
Internet.Network.Information.Center Interknit
Intersections INTERS
An.altitude.reporting.aircraft.that.is.being. Intruder
considered.as.a.potential.threat.and.processed.
by.the.threat.detection.logic.(TCAS).
A video display technique that surrounds Inverse Video
characters.or.digits.with.a.color.rather.than.
creating.those.characters.or.digits.from.a.color.
(i.e.,.black.characters.are.created.by.a.red.
background.rather.than.writing.red.characters).
Input/Output. Refers to bi-directional data ports. I/O
( 1 ) Initial Operational Capability. IOC
( 2 ) Input/Output Concentrator.
( 3 ) Input/Output Controller
Institute.of.Navigation ION
Indian Ocean Region IOR
Internet Operating System IOS
Initial Operational Test and Evaluation IOT&E
(.1.).Instructor.Pilot.. IP
(.2.).Intermediate.Pressure..
(.3.).Internet.Protocol..
(.4.).Intellectual.Property
Informational Pacific Air Traffic Control IPACG
Coordinating.Group
Illustrated.Parts.Breakdown IPB
60
(.1.).Illustrated.Parts.Catalog. IPC
(.2.).Integrated.Processing.Cabinet.
(.3.).Intermediate.Pressure.Compressor
(.1.).Industrial.Products.Division. IPD
(.2.).Integrated.Product.Delivery
Initial Protocol Identifier IPI
Illustrated.Parts.List IPL
Integrated.Performance.Management IPM
Internet.Protocol.Router IPR
In-Plane-Switching IPS
(.1.).Intermediate.Pressure.Turbine.. IPT
(.2.).Integrated.Product.Team
Infrared IR
Integrated.Receiver/Decoder IRD
Internal.Roll.Extrusion IRE
Integrated.Refuel.Panel IRP
(.1.).Inertial.Reference.System. IRS
( 2 ) Interface Requirements Specification
Inertial.Reference.Unit IRU
(.1.).Industry.Standard.Architecture. ISA
(.2.).International.Standard.Atmosphere
Integrated.Systems.Controller ISC
Integrated.Services.Digital.Network ISDN
Information System Design and Optimization ISDOS
System
In-Service.Data.System ISDS
Intermediate.System.Hello ISH
Isolation ISLN
( 1 ) International Organization for ISO
Standardization.
( 2 ) International Standards Organization .
(.3.).Isolation
Refer.to.contour Iso-Contour
ISO Protocol Architecture ISOPA
6_
Intersound.Quality.Control.facility..Facility.that. ISQC
checks,.labels.and.distributes.all.video.cassettes.
(.1.).Integrated.Switching.Panel. ISP
(.2.).Internet.Service.Provider
Interrupt.Service.Routine ISR
(.1.).Impending.Stall.Speed.. ISS
(.2.).Integrated.Surveillance.System
Intermediate.System.Subnetwork ISSN
Integrated.Surveillance.System.Processor.Unit ISSPU
Initial.Signal.Unit ISU
Institute.of.Air.Transport ITA
Information.Technology.Management.is.the. ITM
ground.based.portion.of.an.ADMS.(See.also.
EDMS.).
Indium-Tin Oxide ITO
Integrated.Test.System ITS
Integrated.Test.and.Support.Environment ITSE
(.1.).Interstage.Turbine.Temperature. ITT
(.2.).Inter-Turbine.Temperature
International.Telecommunications.Union ITU
Internal.Uninterruptible.Power.Supply IUPS
Isolation.Valve IV
Interchangeable.Virtual.Instrumentation IVI
Instantaneous.Vertical.Speed.Indicator IVSI
Integrated.Terminal.Weather.System ITWS
Joint.Aviation.Authority JAA
Joint Airworthiness Requirement JAR
Joint Airworthiness Requirements–All Weather JAR-AWO
Operations
Jet.Assisted.Takeoff JAO
Joint Conceptual Definition Phase JCDP
Joint.Development.Concept.Phase JDCP
Joint Definition Phase JDP
6_
Junction.Field.Effect.Transistor JFET
Joint.Photographic.Experts.Group JPEG
Journal.Processing.System JPS
Jammer.to.Signal.Ratio J/S
Joint.System.Acceptance.Test JSAT
Joint.Test.Action.Group JTAG
Joint.Tactical.Information.Distribution.System JTIDS
Kilo-Bytes.(thousand.bytes) KB
Kilobits KBITS
Kilobits.per.second Kbps
Kilobits.Per.Second kb/s
Keyboard.Unit KBU
A.hand-operated.switching.device.or.the.act.of. Key
operating.such.a.device.
Kilogram KG
Kilohertz.(1000.cycles.per.second) kHz
Kilometer km
Key.Performance.Indicators KPI
Kilobytes.Per.Second KPS
Knots kts
Kilovolt-ampere kVA
Kilowatt kW
Left L
L-Band.carrier.(1575.42.MHz) L_
L-Band.carrier.(1227.6.MHz) L_
Civil Satellite Frequency L_
Local.Area.Augmentation.System LAAS
Laboratory Lab
Local.Area.Differential.GPS LADGPS
Local.Area.Network LAN
Link.Access.Protocol-Balanced LAPB
63
Latitude LAT
A radio frequency band from 390 to 1,550 MHz L-Band
Pounds LBS
Layered.Component.Architecture LCA
Leadless.Chip.Carrier LCC
Liquid Crystal Display LCD
Link.Control.Field LCF
Logical Channel Identifier LCI
Logic.Control.Module LCM
Local.Communications.Network LCN
Liquid Crystal on Silicon LCoS
Lighting.Control.Panel LCP
Link.Connection.Refusal LCR
Low.Cost.Simulation.Test.bed LCSTB
Life.Cycle.Value.Stream.Management LCVSM
Lower.Data LD
Localizer.Directional.Aid LDA
Leaded.Chip.Carrier LDCC
Local.Area.Differential.Global.Positioning.Satellite LDGPS
Long Distance Operational Control LDOC
Lightning.Detection.System LDS
Lamp.Driver.Unit LDU
Link.Establish LE
Light.Emitting.Diode LED
The section of the flight between two waypoints. Leg
Low Earth Orbiting LEO
Low Frequency. The frequency range from 30 to LF
300.kHz.
Large.Format.Display.System LFDS
Low Frequency Radio Range LFR
Low.Gain.Antenna LGA
64
Lightning.HIRF.Protection LHP
Left.Inboard LIB
Limit LIM
Limited.North.Atlantic.Regional.Air.Navigation LIMNATRAN
Long-Haul.Interfacility.Communications.System LINCS
Line.Impedance.Stabilization.Network LISN
Logical.Link.Control LLC
Liquid Level Measurement System LLMS
Left Lower Plug. Identifies the plug on the rear LLP
connector.of.an.avionics.unit.
List.of.Materials L/M
Link.Management.Entity LME
Logical.Management.Interface LMI
Locator.Middle.Marker..An.NDB.that.is.co-located. LMM
at.the.same.site.as.the.75.MHz.middle.marker.
beacon.
Left Middle Plug. Identifies the plug on the rear LMP
connector.of.an.avionics.unit.
Local.Mean.Time LMT
Low Noise Amplifier LNA
Lateral.Navigation LNAV
Low LO
Left Outboard LOB
Localizer..The.lateral.guidance.portion.of.an.ILS. LOC
system.
The.condition.that.exists.when.the.DME.receives. Lock-On
reply.pulses.to.at.least.50.percent.of.the.
interrogations..Valid.distance.information.is.then.
available.
Line Oriented Flight Training LOFT
Locator Outer Marker. An NDB that is co-located LOM
at.the.same.site.as.the.75.MHz.outer.marker.
beacon.
Longitude LON
6_
Line Of Position LOP
Long.Range.Navigation..A.system.using.a.ground. LORAN
facility.composed.of.a.master.station.and.a.
slave.station..The.airborne.receiver.computes.
the.position.of.the.aircraft.by.using.two.or.more. received master-slave pairs of signals. LORAN-A
operates at 1850, 1900, and 1950 kHz. LORAN-C
operates at 100 kHz. LORA N-A was replaced by
LORAN-C in 1980.
Long.Range.Navigation.System LORAN C
( 1 ) Line Of Sight. LOS
( 2 ) Line-Oriented Simulation
Linear.Polarization LP
Low-Pressure.Compressor LPC
Link.Protocol.Data.Unit LPDU
Low-Pressure.Turbine LPT
Localizer.Precision.Vertical LPV
(.1.).Low-Range.Radio.Altimeter. LRA or LRRA
(.2.).Line.Replaceable.Assembly
Long.Range.Cruise LRC
Line.Replaceable.Module LRM
Long.Range.Navigation LRN
Long.Range.Radar LRR
Line.Replaceable.Unit LRU
(.1.).Lower.Sideband..The.lower.side.band.is.the. LSB
difference in frequency between the AM carrier
signal.and.the.modulation.signal..
( 2 ) Least Significant Bit
Low.Speed.Cues:.Markings.on.the.airspeed.scale. LSC
associated.with.the.stall.speed.region.
Least Significant Digit LSD
Low-Speed.Frame.Relay.Service.Access.Device LS-DSAD
Low-Speed.Frame.Relay.Access.Device LS-FRAD
Large.Scale.Integration LSI
66
Line.Select.Key LSK
Local.Subnetwork LSN
Link.State.PDU LSP
Lowest.Two-way.Channel LTC
Long-Term.Image.Retention LTIR
Left Top Plug. Identifies the plug on the rear LTP
connector.of.an.avionics.unit.
Long-Term Verification Software LTVS
A fixed line placed on an indicator to indicate the Lubber Line
front-to-rear.axis.of.the.aircraft.
Lower.Sideband.Voice LV
Low-Voltage.Differential.Signaling LVDS
(.1.).Linear.Variable.Differential.Transformer.. LVDT
(.2.).Linear.Voltage.Differential.Transducer.(used.
with.aircraft.control.surface.servos).
Level.Change LVLCHG
Low.Voltage.Power.Supply LVPS
Low Visibility Take-Off LVTO
Long.Wavelength.Infra-Red LWIR
Lightning LX
Mach.Number M
Meter m
Maximum.Authorized.IFR.Altitude MAA
Medium.Access.Controller MAC
Mach.number.is.the.ratio.of.the.true.airspeed.to. Mach Number the speed of sound at a particular flight condition.
It is the chief criterion of airflow pattern and is
usually.represented.by.the.free-stream.steady-
state.value.
Magnetic Mag
The.bearing.with.respect.to.magnetic.north. Magnetic
Magnetic.Variation:.The.difference.between.True. MAGVAR
North.and.Magnetic.North.
6_
The.direction.north.as.determined.by.the.earth’s. Bearing
magnetic field. The reference direct ion for Magnetic North
measurement.of.magnetic.directions.
Maintenance MAINT
Mean.Administrative.and.Logistics.Delay.Time MALDT
Manual MAN
(.1.).Missed.Approach.Point. MAP
(.2.).Mode.Annunciator.Panel..
(.3.).Management.Authorization.Process
A.transmitter.operating.at.75.MHz.that.provides. Marker Beacon
identification of a particular position along an
airway.or.on.the.approach.to.an.instrument.
runway..The.marker.beacon.is.continuously..
tone-modulated.by.a.400-Hz,.a.1,300-Hz.or.
a.3,000-Hz.tone..Marker.beacons.along.an.
instrument.runway.provide.a.long-course.(range).
guidance.and.design.ate.when.an.aircraft.should.
be.at.a.certain.altitude.if.the.aircraft.is.following.
the.glide.path.
Mach/Airspeed.Indicator M/ASI
Minimum.Aviation.System.Performance. MASPS
Standards
Maintenance.Access.Terminal MAT
Modular.Avionics.Unit MAU
Missed.Approached.Waypoint MAWP
Maximum MAX
Maximum.engine.thrust.for.two-engine.climb MAX CLB
Maximum.engine.thrust.for.two-engine.cruise MAX CRZ
MLS.Azimuth:.A.ground.based.radio.that.provides. MAZ
lateral.guidance.during.an.MLS.landing.
Marker.Beacon MB
Model-Based.Development MBD
Multiple.Bit.Error MBE
Mega.bytes.per.Second Mbps
6_
(.1.).Master.Change.. MC
(.2.).Master.Caution
Minimum.Crossing.Altitude MCA
Microwave.Circuit.Board MCB
Mean.Cycles.Between.Failures MCBF
Maintenance.Control.Computer MCC
Multiple.Condition.Decision.Coverage MCDC
Maintenance.Control.Display.Panel MCDP
Multifunctional.Control.Display.Unit MCDU
Modular Cabinet Equipment MCE
Master.Caution.Light MCL
Manufacturing.Control.Number MCN
(.1.).Maintenance.Control.Panel. MCP
(.2.).Mode.Control.Panel
Max.Continuous.Thrust MCT
(.1.).Modular.Concept.Unit.(approximately.. MCU
1/8-ATR,.Airline.Transport.Rack)..
(.2.).Motor.Control.Unit.(used.in.auto.throttle)..
(.3.).Multifunction.Concept.Unit
Minimum.Descent.Altitude MDA
Maintenance.Diagnostic.Computer:.A.computer. MDC
that.monitors.for.failures.of.others.systems.
Meteorological.Data.Collection.and.Reporting. MDCRS
Service
Minimum Descent Height. A specified height in MDH
a.non-precision.approach.or.circling.approach.
below.which.descent.must.not.be.made.without.
the required visual reference. Minimum Descent
Height.(MDH).is.referenced.to.aerodrome.
elevation.or.to.the.threshold.of.that.is.more.than.
7.feet.(2.m).below.the.aerodrome.elevation..A.
MDH.for.a.circling.approach.is.reference.to.the.
aerodrome.elevation.
Multipurpose.Data.Link MDL
69
(.1.).Minimum.Discernible.Signal..The.MDS.is.the. MDS
lowest.RF.signal.level.that.can.be.detected.as.a.
valid.signal...
(.2.).Maintenance.Diagnostic.Systems
Maintenance.Display.Terminal MDT
Minimum.En.route.Altitude MEA
Main Equipment Center MEC
Minimum Equipment List. The list of equipment MEL
that the FAA requires be aboard and working on
an aircraft before flying.
MicroElectroMechanical.Systems MEMS
Medium Earth Orbit MEO
Main.Engine.Start MES
Meteorology MET
Medium Frequency. The portion of the radio MF
spectrum.from.300.kHz.to.3.MHz.
Multifunction.Control.Display.Panel MFCP
Multifunction.Display MFD
Multifunction.Display.System MFDS
Multifunction.Display.Unit MFDU
Mixed.Fleet.Flying MFF
Mean.Fault.Isolation.Time MFIT
Maintenance.Fault.Memory MFM
Media.File.Server MFS
MLS.Glidepath:.A.ground.based.radio.that. MGP
provides.vertical.guidance.during.an.MLS.landing.
Main.Gear.Steering.Control.Unit MGSCU
Magnetic.Hard.Drive MHD
Megahertz.(1,000,000.cycles.per.second) MHz
Management.Information.Base MIB
Management.Information.Base.II MIB II
Microphone..Also.refers.to.the.output.signal.of.the. MIC
microphone.
_0
Micro.En.route.Automated.Radar.Tracking. MicroEARTS
System
Manufacturing Inspection District Office MIDO
Multipurpose.Interactive.Display.Unit MIDU
Military MIL
General Prediction of Electronic Equipment MIL-HDBK-___
(MTBF)
Military Specifications MILSPEC
System Safety Requirements MIL-STD-___
(.1.).Minimum.. Min
(.2.).Minutes
Million.Instructions.Per.Second MIPS
Most Important Requirement MIR
Multi-function.KeyPad MKP
(.1.).Marker.. MKR
(.2.).Marker.Beacon
Maneuver.Limited.Altitude MLA
Microwave.Landing.System:.An.ILS.like.system. MLS
that.potentially.provides.curved.lateral.path.
selectable.angle.approach.
Maximum.Landing.Weight MLW
(.1.).Mass.Memory.. MM
(.2.).Middle.Marker:.MB.used.in.conjunction.with.
ILS,.intercepts.glideslope.approximately.200.feet.
above.touchdown.
(.1.).Modular.Mounting.Enclosure.. MME
( 2 ) Moving Map Equipment
Master Minimum Equipment List MMEL
Man-Machine.Interface MMI
Monolithic.Microwave.Integrated.Circuit MMIC
The.maximum.Mach.number.at.which.an.aircraft. Mmo has been certified to operate.
Mach Maximum Overspeed MMO
Multi-Mode.Landing.System.Receiver MMR
__
Maintenance.Management.System MMS
Millimeter.Wave MMW
Magnetic.North MN
Network.Management.Category.Interaction. MNCID
Diagram
Minimum Navigation Performance Specification MNPS
Magneto-Optical MO
(.1.).Memorandum.of.Agreement. MOA ( 2 ) Military Operation Area
Minimum Obstruction Clearance Altitude MOCA
( 1 ) Magneto-Optical Drive . MOD
( 2 ) Modification.
(.3.).Modulator
The pulse format for an identification code Mode A
interrogation.of.an.ATC.RBS.transponder.
An.optional.mode.for.transponder.interrogation. Mode B
The.pulse.format.for.an.altitude.information. Mode C
interrogation.of.an.ATC.RBS.transponder.
An.unassigned,.optional.transponder.mode. Mode D
(.1.).Mode.Select.(a.transponder.format.to.allow. Mode S
discrete.interrogation.and.data.link.capability).
(.2.).Selective.interrogation.mode.of.SSR
Modulator/De.modulator MODEM
Monitor Mon
Minimum Operational Performance Requirements MOPR
Minimum Operational Performance Specifications MOPS
Minimum Off-Route Altitude MORA
Metal Oxide Semiconductor MOS
Metal Oxide Semiconductor Field Effect MOSFET
Transmitter
Memorandum Of Understanding MOU
(.1.).Main.Processor.. MP
( 2 ) Middle Plug. Identifies the plug position on
the.rear.connector.of.an.avionics.unit.
__
Multiport.Protocol.Converter.Unit MPCU
Mobile.Packet.Data.Service MPDS
Maximum.Permissible.Exposure.Level MPEL
Multifunction.Process.Unit MPU
Minimum.Reception.Altitude MRA
Maintenance.Review.Board MRB
Multichannel.Receiver/Decoder.Unit MRDU
Maintenance, Repair & Overhaul MRO
Multiple-tasking Real-time Operating System MROSE
Executive
Manufacturing Revision Request MRR
Mean.Response.Time MRT
Millisecond MS
Meter.per.Second m/s
Ministry.of.Transportation.Satellite.Augmentation. MSAS
System.(Japan)
Most Significant Bit MSB
( 1 ) Message Sequence Chart . MSC
(.2.).Member.Services.Center
Mobile.Satellite.Service.Provider MSCP
(.1.).Mass.Storage.Device.. MSD
( 2 ) Most Significant Digit
Message MSG
Medium.Scale.Integration MSI
Minimum.Shift.Keying MSK
Mean.Sea.Level MSL
Mode.Select.Panel MSP
Mobile-Subnetwork.Dependent.Convergence M-SNDCF
Mode S Specific Protocol MSP
Monopulse.Secondary.Surveillance.Radar MSSR
Mode S Specific Services MSSS
_3
(.1.).Mode.Select.Unit.. MSU
(.2.).Magnetic.Sensor.Unit
Minimum.Time MT
Mean.Time.Between.Failures..A.performance. MTBF
figure calculated by dividing the total unit flying
hours.(airborne).accrued.in.a.period.of.time.by.
the.number.of.unit.failures.that.occurred.during.
the.same.time..Where.total.unit.hours.are.
available,.this.may.be.used.in.lieu.of.total.unit. flying hours.
Mean Time Between Outages MTBO
(.1.).Mean.Time.Between.Removal.. MTBR
(.2.).Mean.Time.Between.Repairs..A.performance.
figure calculated by dividing the total unit flying
hours.accrued.in.a.period.by.the.number.of.unit.
removals.(scheduled.plus.unscheduled).that.
occurred.during.the.same.period.
(.1.).Mean.Time.Between.Unscheduled.Removal.. MTBUR
(.2.).Mean.Time.Between.Unit.Replacements..A. performance figure calculated by dividing the total
unit flying hours (airborne) accrued in a period
by.the.number.of.unscheduled.unit.removals.that.
occurred.during.the.same.period.
Maintenance.Terminal.Cabinet MTC
Maintenance.Terminal.Display MTD
Maintenance.Terminal.Function MTF
Moving.Target.Indicator..This.type.of.radar.display. MTI
will.show.only.moving.targets.
Module.Test.and.Maintenance MTM
Module.Test.and.Maintenance.Bus.Interface.Unit MTMIU
Multi-function.Transport.Satellite.System.(Japan) MTSAT
Mean.Time.To.Dispatch.Alert MTTDA
_4
Mean Time To Failure. A performance figure MTTF
calculated.by.dividing.the.summation.of.times.to.
failure.for.a.sample.of.failed.items.by.the.number.
of.failed.items.in.the.sample..The.same.item.
failing.N.times.constitutes.N.failed.items.in.the.
sample..This.is.different.from.mean.time.between.
failures.since.no.allowance.is.given.to.items.that.
have.not.failed.
Mean.Time.To.Maintenance..The.arithmetic.mean. MTTM
of.the.time.intervals.between.maintenance.act.
ions.
Mean.Time.to.Maintenance.Alert MTTMA
Mean Time To Repair. A performance figure MTTR
calculated.by.dividing.the.sum.of.the.active.repair.
elapsed.times.accrued.in.a.period.on.a.number.
of.designated.items.by.the.number.of.these.items.
repaired.in.the.same.period.
Mean.Time.To.Restore.Service MTTRS
Mean.Time.To.Unscheduled.Removal..A. MTTUR
performance figure calculated by dividing the
summation.of.times.to.unscheduled.removal.for.
a.sample.of.removed.items.by.the.number.of.
removed.items.in.the.sample..This.is.different.
from.MTBUR.since.no.allowance.is.given.to.items.
that.have.not.been.removed.
ACARS.Management.Unit MU
Multiplier MULT
Minimum Use Specification. A generic description MUS
by.parameter.and.characteristics.of.the.test. equipment and resources required for testing a
unit.or.system.
Multiplexer MUX
Multi-domained,.Vertically.Aligned MVA
Major.World.Air.Route.Area MWARA
Master.Warning/Master.Caution MW/MC
Mid.Wavelength.Infra-Red MWIR
Master.Warning.Light MWL
__
North N
Fan.speed N _
Intermediate.compressor.speed N _
High.compressor.speed N 3
Not.Applicable N/A
National.Advisory.Committee.for.Aeronautics NACA
National.Airspace.Data.Interchange.Network NADIN
Negative.Acknowledgement NAK
(.1.).National.Aircraft.Standard. NAS
(.2.).National.Airspace.System
National.Aeronautics.and.Space.Administration NASA
NAS.Precision.Approach.and.Landing.System NASPALS
North.Atlantic.Tracks NAT
National.Air.Transport.Association,.Inc. NATA
National Air Traffic Controllers Association NATCA
(.1.).North.Atlantic.Track.System. NATS
(.2.).North.American.Telephone.System
North Atlantic/North American/Pacific NAT/NAM/PAC
Navigation NAV
Navigational Aid. A radio station (VOR) or a NAVAID
waypoint.that.assists.in.navigation.
A.medium.holding.the.customized.navigation. Navigation
database. Datacard
The.NAVSTAR.global.positioning.system.(GPS).is. NAVSTAR
a.system.using.24.satellites,.all.reporting.precise.
time.signals,.along.with.location.keys..Eight.
satellites.are.in.each.of.three.63-degree.inclined.
plane.circular.orbits.at.11,000.nmi.in.altitude..The.
system.is.used.for.navigation.and.determining.
exact.position.
Equivalent to 6,076.1 feet, or approximately . Nautical Mile
1.15.statute.miles. (nmi)
National.Business.Aviation.Association NBAA
Numerical.Control NC
New.Installation.Concept NIC
_6
No.Computed.Data NCD
Not.Currently.Implemented NCI
Network.Coordination.Station NCS
Navigation.Display..An.EFIS.presentation. ND
substituting.for.the.horizontal.situation.indicator.
(HSI).
(.1.).Navigation.Data.Base.(as.stored.in.FMC. NDB
memory)..
(.2.).Non-Directional.Radio.Beacon..A.ground. station designed specifically for ADF use that
operates.in.the.190-.to.550-kHz.range..Transmits.
a.continuous.carrier.with.either.400-.or.1020-Hz. modulation (keyed) to provide identification.
Non-Developmental.Item NDI
Network.Element NE
North.European.ADS-B.Network NEAN
Negative NEG
National.Electrical.Manufacturers.Association NEMA
National.Environmental.Satellite,.Data.and. NESDIS
Information.Service
Network.Entity.Title NET
Next.Generation.Communications NEXCOM
Next.Generation.Radar NEXRAD
No.Faults.Found NFF
New Generation Air Traffic Manager NGATM
High.Pressure.Gas.Generator.RPM NH
Notes.and.Helps.Editor NHE
NAT.Implementation.Management.Group.Cost. NICE
Effectiveness
NAS.Infrastructure.Management.System NIMS
Network.Interface.Processor NIP
Network.Interface.Router NIR
Network.interface.Router.VDL NIRV
Not-In-Service NIS
__
National.Institute.of.Standards.and.Technology NIST
N.is.set.for.any.layer.name.(such.as.link,.network,. N-Layer
etc.).or.for.the.initial.(e..g..N-SDU.means.LSDU. at the link layer). OSI model definition.
Low-Pressure.Gas.Generator.RPM NL
Network-Loadable.Module NLM
Network.Layer.Protocol NLP
Netherlands.National.Aerospace.Laboratory NLR
Not.Less.Than NLT
Nautical.Mile NM or NMI
Network.Management NM
National.Meteorological.Center NMC
Network.Management.Category.Class.Diagram NMCCD
Network.management.Category.Diagram NMCD
Network.Management.Function NMF
Network Management Interface Requirements NMIRS Specification
N-type Metal Oxide Semiconductor NMOS
Network.Management.Plan NMP
Network.Management.System NMS
Not.More.Than NMT
“N”s.are.used.to.represent.a.generic.number.. NNN
Typically, multiple Ns represent a frequency.
National Oceanic and Atmospheric Administration NOAA
Notice Of Change NOC
North Atlantic Oceanic Concept and NOCAR
Requirements
National Operations Control Center NOCC
No Communication. A NO COM annunciation NO COM
indicates.that.a.downlink.message.has.not.been.
acknowledged.in.an.ACARS.system.
Notice of Inquiry NOI
__
Undesired.random.electromagnetic.disturbances. Noise
or.spurious.signals.that.are.not.part.of.the.
transmitted.or.received.signal.
Notification of Problem NOP
North Pacific NOPAC
Notice.to.Airmen NOTAM
Notice.to.Users.(ARINC) NOTUS
Non-Precision.Approach NPA
Network.Protocol.Data.Unit NPDU
Notice.of.Proposed.Rule.Making NPRM
Network.Router NR
Network.Routing.Domain NRD
National.Route.Program NRP
Non-Return.to.Zero NRZ
Network.Service NS
Network.Service.Access.Point NSAP
Network.Service.Data.Unit NSDU
Neutron.Single.Event.Upset NSEU
National.Severe.Storms.Laboratory NSSL
No.Trouble.Found..(Referring.to.testing.or. NTF
checkout.of.unit/module.)
National.Telecommunications.and.Information. NTIA
Administration.(U.S.)
National.Transportation.Safety.Board NTSB
Network User Identification NUI
Night.Vision.Goggles NVG
Non-Volatile.Memory NVM
Non-Volatile.RAM NVRAM
National.Weather.Service..The.NWS.provides. NWS
a.ground-based.weather.radar.network.
throughout.the.United.States..The.radar.network.
operates.continuously.and.transmits.the.data.
to.the.National.Meteorological.Center,.where.it.
correlates.with.other.weather.observations.
_9
Oceanic Area Control Center OAC
Official Airline Guide OAG
Oceanic Automation System OAS
( 1 ) Operational Acceptance Test . OAT
( 2 ) Optional Auxiliary Terminal. The OAT may be
in.the.form.of.a.CRT/Keyboard.device.capable.
of.interfacing.with.other.sources.of.data.on.the.
aircraft.and.supplying.data.to.a.hard.copy.printer..
(Used.in.an.ACARS.system.)..
( 3 ) Outside Air Temperature. The uncorrected
reading.of.the.outside.temperature.gauge..
Different types of gauges require different correct
ion.factors.to.obtain.static.air.temperature.
Orbit and Attitude Tracking OATS
Operational Build Plan OBP
( 1 ) Omnibearing Selector. A panel instrument OBS
that.contains.the.controls.and.circuits.to.select. an omnibearing and determine the TO-FROM
indication... ( 2 ) Optical Bypass Switch
Oceanic Control Area OCA
Operations Control Center OCC
Oceanic Clearance Delivery OCD
Oceanic Communications Improvement Group OCIG
Oceanic CLearance OCL
Options Configuration Module OCM
Oceanic Clearance Processor OCP
Base-8.counting.system..Numbers.include.0,.1,.2,. Octal
3,.4,.5,.6,.7.
Oceanic Display And Planning System. Will ODAPS
present oceanic flight data to controllers in a
display.that.will.enable.better.route.and.altitude.
assignments.
Organizational Designated Airworthiness ODAR
Representative
Operational Display and Input Development ODID
_0
( 1 ) Optical Data Link . ODL
( 2 ) Oceanic Data Link
Open Data Network ODN
Original Equipment Manufacturer OEM
Overhead Electronics Units OEU
The.time.that.the.aircraft.leaves.the.gate. Off-Block Time
Same.as.cross-side.of.the.cockpit. Off-Side
Operational Flight Program OFP
Offset OFST
Operational Ground Equipment OGE
Overhead Unit (HUD) OHU
Outline Installation Drawing OID
Orientation/Introduction Unit OIU
Onboard Local Area Network OLAN
On-Line Data Interchange OLDI
Operating and Maintenance O&M
Outer Marker Beacon: MB used in conjunction OM
with.ILS,.intercepts.glideslope.approximately.
1400.feet.above.touchdown.
Onboard Maintenance Documentation OMD
A.navigation.system.that.uses.two.high-powered. OMEGA
transmitter.ground.stations.to.broadcast.a.
continuous.wave.signal..The.receiver.measures.
the.range.difference.between.the.two.stations.to.
determine.position.
The.bearing.indicated.by.a.navigational.receiver. Omnibearing
on.transmissions.from.an.omnidirectional.radio.
range (VOR).
( 1 ) Onboard Maintenance System. OMS
( 2 ) Order Management System
Object Modeling Technique OMT
Refers.to.a.pilot.or.copilot’s.own.side.of.the. ON-SIDE
cockpit.
Object Oriented Analysis OOA
__
Object Oriented Design OOD
OUT-OFF-ON-IN. An OOOI event is recorded as OOOI
part of the ACARS operation. The OUT event is
recorded.when.the.aircraft.is.clear.of.the.gate.and. ready to taxi. The OFF event occurs when the
aircraft has lifted off the runway. The ON event
occurs.when.the.aircraft.has.landed..The.IN.event.
occurs.when.the.aircraft.has.taxied.to.the.ramp.
area.
The.time.that.the.aircraft.arrives.at.the.gate. On-Block Time
Operational OP
Operational Program Configuration OPC
Optimum OPT
Overhead Panel ARINC 629 System OPAS
Overhead Panel Bus Controller OPBC
Operational Program Configuration OPC
Operation OPER
Once Per Revolution OPR
( 1 ) Operations Per Second . OPS
( 2 ) Operational Program Software
Operational Specifications OPSPECS
Overspeed Protection Unit OPU
Optical Quick Access Recorder O-QAR
Operational Requirements OR
Origin ORIG
Owner’s Requirement Table ORT
Operating System OS
Order Status Report OSC
Oceanic System Development Support OSDS
( 1 ) Open Systems Interconnection . OSI
( 2 ) Open System Interface
OSI Environment OSIE
Open Systems Interconnection Reference Model OSI-RM
Open Shortest Path First OSPF
__
Operational Test and Evaluation OT&E
Office of Technology Assessment (U.S.) OTA
Operational Traffic Flow Planning OTFP
Over The Horizon OTH
Office of Telecommunications Policy (U.S.) OTP
Off-The-Shelf OTS
Override OVRD
Overhead Video System OVS
Oxygen oxy
(.1.).Passenger.Address.. PA
( 2 ) Power Amplifier
Path.Attenuation.Compensation.(Correction):.A. PAC
warning.annunciation.of.the.weather.radar..It.tells.
the pilot there is a significant weather activity on
that.bearing.
Passenger.Address/Cabin.Interphone PA/CI
Passenger.Address.and.Communication. PACIS
Interphone.System
Packet.Assembler-Disassembler PAD
DME channels are paired with a VORTAC or ILS Paired
frequency and are automatically selected when Channels
the VORTAC or ILS frequency is selected. Most
navigation.controls.have.this.feature.
Programmable.Array.Logic PAL
Pulse.Amplitude.Modulation PAM
Pressure,.ambient PAMB
Procedures.for.Air.Navigation.Services-Aircraft. PANS-OPS
Operations
Precision.Approach.Path.Indicators PAPI
Precision.Approach.Radar..An.X-band.radar.that. PAR
scans.a.limited.area.and.is.part.of.the.ground-
controlled.approach.system.
Passenger.Address.System PAS
(.1.).Pilot.Applications.Terminal.. PAT
(.2.).Primary.Access.Terminal
_3
Passenger.Address.Unit PAU
Presence.And.Validity PAV
Programmable.Audio.Video.Entertainment. PAVES
System
Performance.Assessment.and.Workload. PAWES
Evaluation
Passenger PAX
Push.Button.Annunciator PBA
Place.Bearing/Distance.(waypoint) PBD
Post.Burn-In.Data PBID
Private.Branch.Exchange PBX
(.1.).Personal.Computer.. PC
(.2.).Printed.Circuit
The.GPS.precision.code P-Code
P physical Configuration Audit PCA
Printed.Circuit.Board PCB
Pilot.Controller.Communication PCC
(.1.).Protocol.Control.Information..The.N-PCI.is. PCI
exchanged between peer network members (OSI
Model).to.coordinate.joint.information...
(.2.).Peripheral.Computer.Interface/Interconnect
Precipitation PCIP
Pulse.Code.Modulation PCM
Personal.Computer.Memory.Card.Interface. PCMCIA
Association
(.1.).Passenger.Control.Unit.. PCU
(.2.).Power.Control.Unit
Profile Descent PD
Premature.Descent.Alert PDA
Performance.Data.Base PDB
Pre-Departure.Clearance PDC
Panel.Data.Concentrator.Unit PDCU
Package.Design.Document PDD
_4
Product Definition Data Interface. Standardizes PDDI
digital descriptions of part configurations and
properties.needed.for.manufacturing.
(.1.).Primary.Display.Function.. PDF
(.2.).Portable.Document.Format
(.1.).Program.Design.Language.. PDL
(.2.).Portable.Data.Loader
Precision Distance Measuring Equipment P-DME
Public.Data.Network.(CC.ITT/ISD) PDN
Position Dilution Of Precision. AGPS term for PDOP
error.introduced.into.the.GPS.calculations.
Powered Door Opening System PDOS
Preliminary.Design.Review PDR
Primary.Display.System PDS
(.1.).Power.Distribution.Unit.. PDU
(.2.).Power.Drive.Unit..
(.3.).Protocol.Data.Unit..The.N-PDU.is.a.
combination.of.the.N-PCI.and.the.N-UD.or..
N-SDU..The.N-PDU.is.the.total.information.that.is. transferred between peer network members (OSI
Model).as.a.unit..
(.4.).Pilot.Display.Unit
Peer.Entity.Contact.Table PECT
Peak.Envelope.Power PEP
Performance PERF
A.relative.number.used.to.compare.the. Performance
performance.of.different.radar.systems..It.is. Index
calculated.from.transmitter.peak.power,.antenna.
gain,.pulse.width,.prf,.antenna.beam.width.and. the receiver noise figure.
Program Evaluation Review Technique PERT
Passenger.Entertainment.System PES
Pacific Engineering Trials PET
Preliminary.Eurocontrol.Test.of.Air/Ground.Data. PETAL
Link
__
Preliminary.Eurocontrol.Test.of.Air/Ground.Data. PETAL II
Link,.Phase.II
Preliminary.Eurocontrol.Test.of.Air/Ground.Data. PETAL IIe
Link,.Phase.II.Extension
(.1.).Pilot.Flying.. PF
(.2.).Power.Factor
Primary.Flight.Computer PFC
Primary.Flight.Control.System PFCS
(.1.).Primary.Flight.Director.. PFD
(.2.).Primary.Flight.Display..An.EFIS.presentation.
substituting.for.the.ADI.
Passenger.Flight.Information.System PFIS
Primary Field Of View PFOV
Pulse Repetition Frequency. The rate at which PFR
pulses.are.transmitted.
Product.File.Sets PFS
Pin.Grid.Array PGA
Program.for.Harmonized.ATC.Research.in. PHARE
Europe
Performance.Buffet.Limit PHIBUF
Nominal.Bank.Angle PHINOM
Physical.Interface.Device PHY
A.signal.in.which.the.phase.varies.(with.respect. Phase
to.the.original.signal).with.the.amplitude.of.the. Modulation
modulatory.signal,.while.the.amplitude.of.the.
carrier.wave.remains.constant..Similar.to.a.
modified frequency modulated signal.
Parameter Identifier PI
Performance.Integrity.and.Availability PIA
Protocol.Implementation.Conformance. PICS
Statements
( 1 ) Parameter Identifier . PID
( 2 ) Primitive Identifier .
( 3 ) Process Identifier
Processor Input/Output PI/O
_6
Production.or.Pipe.Internal.Roll.Extrusion PIRE
Pilot.Reports PIREPS
The.sum.of.the.static.and.dynamic.pressures.and. Pitot Pressure
is.the.total.force.per.unit.area.exerted.by.the.air.
on.the.surface.of.a.body.in.motion.
A.forward.facing.probe.attached.to.the.outside.of. Pitot Tube
the.aircraft.to.sense.the.relative.pressure.of.the.
aircraft.moving.through.the.atmosphere..Named.
for Henri Pitot who first used this method of
measuring fluid flow pressure.
Parameter.Length PL
(.1.).Power.Level.Angle.. PLA
(.2.).Programmable.Logic.Array
Precision.Lightweight.GPS.Receiver PLGR
Phase.Locked.Loop PLL
Project.Leadership.Team PLT
Phase.Modulation PM
(.1.).Parts.Manufacturing.Approval.. PMA
(.2.).Permanent.Magnet.Alternator
Portable.Maintenance.Access.Terminal PMAT
(.1.).Provisional.Memory.Cover.. PMC
(.2.).PCI.Mezzanine.Card
Processor/Mass Storage Equipment PME
Permanent.Magnet.Generator PMG
Program Management Office PMO
P-Type Metal Oxide Semiconductor PMOS
Precision.Multi-mode.Radar PMR
Program.Management.Reviews PMRs
Performance.Management.System PMS
(.1.).Part.Number.. PN
(.2.).Pseudo.Noise
Performance.Navigation.Computer.System PNCS
Primary.Navigation.Display PND
Pneumatic PNEU
__
Pilot.Not.Flying PNF
Point.of.No.Return PNR
Plain Old ACARS POA
Proof Of Concept. A Demonstration, in a full POC
operational.environment,.of.the.proposed.
concept,.system,.facilities,.weather.conditions,.
crew.complement,.related.aircraft.systems.and.
any.other.relevant.parameters.necessary.to.show.
concept.validity..Acceptable.performance,.system.
reliability,.repeatability,.and.typical.pilot.response.
to.failures.must.be.successfully.demonstrated..
The demonstration itself is not a certification
program.
Principal Operations Inspector POI
Point.of.Presence POP
Pacific Ocean Region POR
Position POS
Position.Initialization POSINIT
Portable Operating System Interface POSIX
Position.Reference POSREF
Potentiometer POT
Power-On Self-Test POST
Plain Old Telephone System/Service POTS
Product/Process.Assurance.Plan P/PAP
Power.PC PPC
Physical.Layer.Protocol.Data.Unit PPDU
Planned.Position.Indicator..A.type.of.radar.display. PPI
which.shows.aircraft.positions.and.airways.chart.
on.the.same.display.
Processor-to-Processor.Link PPL
pages.per.minute ppm
(.1.).Pulse.Position.Modulation.. PPM
(.2.).Parts.Per.Million
Present.Position PPOS
Point-to-Point.Protocol PPP
__
(.1.).Packets.Per.Second. PPS
(.2.).Precise.Positioning.Service.
(.3.).Pulse.Per.Second
Problem.Report PR
Predictive.Receiver.Autonomous.Integrity. PRAIM
Monitoring
Prerecorded.Announcement.Machine PRAM
Preliminary.Data PRELIM
Pressure PRESS
The.altitude.measured.above.standard.pressure. Pressure
level..Based.on.the.relationship.of.pressure.and. Altitude
altitude.with.respect.to.a.standard.atmosphere.
Previous PREV
A.resolution.advisory.that.instructs.the.pilot.to. Preventive
avoid.certain.deviations.from.current.vertical.rate.. Advisory
(TCAS)
Pulse Repetition Frequency PRF
(.1.).Primary.. PRI
(.2.).Primary.Rate.Interface
A means of navigation which satisfies the Primary Means
necessary.levels.of.accuracy.and.integrity.for.a. of Navigation
particular.area,.route,.procedure.or.operation..
The.failure.of.a.“Primary.Means”.of.navigation.
may result in, or require reversion to a “non-
normal”.means.of.navigation,.or.an.alternate.
level of RNP. Qualification as a “primary means”
of navigation typically requires that ANP/EPU be
less.than.RNP.for.99.99%.of.the.time.
(.1.).Precision.Runway.Monitoring. PRM
(.2.).Proposed.Rule.Making
Pseudo.Random.Noise PRN
NND-1/Precision.Area.Navigation PRNAV
Procedure PROC
Profile PROF
Progress.Page.on.MCDU PROG
Programmable ROM PROM
_9
NND-1/Precision.Area.Navigation P-RNAV
A.set.of.rules.for.the.format.and.content.of. Protocol
messages.between.communicating.processes.
Provisional PROV
Proximity PROX
Pressure.Regulating.and.Shutoff.Valve PRSOV
Press.To.Reset P/RST
Printer PRTR
Power.Supply PS
(.1.).Power.Supply.Assembly.. PSA
(.2.).Preselect.Altitude
Product.Support.&.Assurance.Agreement PSAA
Primary.Stability.Augmentation.System PSAS
Project Specific Certification Plans PSCP
Programmable.System.Control.Unit PSCU
Port.Sharing.Device PSD
Packet.Switched.Data.Network PSDN
Power Supply Equipment PSE
Proximity.Sensor.Electronic.Unit PSEU
Pounds per square inch Differential PSID
Pounds per square inch Gage PSIG
Problem.Statement.Language/Problem.Statement. PSL/PSA
Analyzer
(.1.).Power.Supply.Modules.. PSM
(.2.).Product.Support.Managers
Packet.Switching.Network PSN
Partnership.for.Safety.Plan PSP
Preferred.Standard.Parts.List PSPL
Primary.Surveillance.Radar..The.part.of.the.ATC. PSR
system.that.determines.the.range.and.azimuth.of.
an.aircraft.in.a.controlled.air.space.
Proximity.Sensor.System PSS
Preliminary.System.Safety.Assessment PSSA
90
Passenger.Service.Unit PSU
Total.Pressure PT
Production Test Requirements PTR
Pitch:.Movement.about.the.lateral.(left.to.right). PTCH
axis.of.the.aircraft.
Performance.Test.Domain PTD
Packet.Switching.Exchange PSE
Public.Switched.Telephone.Network PSTN
Path PTH
Packet Type Identifier PTI
Peripheral Transition Module (I/O interface for PTM
SBC)
Production Test Requirements PTR
Problem.Tracking.System PTS
Production Test Specification Document PTSD
(.1.).Post,.Telephone.and.Telegraph.. PTT
(.2.).Push.To.Talk..Also.refers.to.the.switching.
signal.that.enables.the.transmitter...
(.3.).Push.To.Test
Power.Transfer.Unit PTU
Plan.View.Display PVD
Parameter.Value PV
Permanent.Virtual.Circuit PVC
Position,.Velocity,.Time PVT
Printed.Wire.Boards PWB
Pulse-Width.Modulation PWM
Power PWR
Predictive.Windshear.System PWS
Quadrature.Amplitude.Modulation QAM
Quick.Access.Recorder QAR
Quality.Control QC
Quadrantal.Error.Corrector QEC
9_
A.method.of.setting.the.altimeter.to.compensate. QFE
for.changes.in.barometric.pressure.and.runway.
elevation. Pilot receives information from airfield
and.adjusts.his.altimeter.accordingly.and.it.will.
read.zero.altitude.at.touchdown.on.the.runway.
Quality.Management QM
Quality.Management.Plan QMP
The.method.of.setting.the.altimeter.to.the. QNE
standard.atmosphere.datum-29.92.inches.of.
mercury.(1,013.25.mb)..This.setting.is.used.in..
the.United.States.airspace.by.all.aircraft.above..
FL.180.
The.more.common.method.of.setting.the.altimeter. QNH
to.compensate.for.changes.in.barometric.
pressure. Pilot receives information from airfield,
adjusts.his.altimeter.accordingly.and.the.altimeter.
will read airfield elevation at touchdown.
Quality Operating Procedures QOP
Quality.of.Service QoS
Quick.Reference.Handbook QRH
Quantity QTY
Quadrant QUAD
Error.in.the.relative.bearing.caused.by.the. Quadrantal
distortion of the received radio signal (RF fields) Error
by.the.structure.of.the.aircraft.
(.1.).Right.. R
(.2.).Route.Tuned.NAVAID..
(.3.).Rudder
(.1.).Resolution.Advisory.(generated.by.TCAS).. RA
(.2.).Radio.Altimeter..
(.3.).Routing.Area..
(.4.).Radio.Altitude:.The.absolute.altitude.(height).
above.the.ground..Measured.by.a.radio.altimeter.
system.
Regional.Airline.Association RAA
9_
Rabbit.Tracks,.or.running.rabbits,.refer.to.the. Rabbit Tracks
distinctive.display.produced.by.another.(alien.
radar).radar.system.transmission.
(.1.).Radial.. RAD
(.2.).Radio..
(.3.).Rapid.Application.Development
Radio.Detecting.and.Ranging..A.system.that. Radar
measures.distance.and.bearing.to.an.object.
The.time.interval.(approximately.12.359. Radar Mile
microseconds) required for radio waves to travel
one.nautical.mile.and.return.(total.of.2.nmi).
A line of direction going out from a VOR station Radial
measured.as.a.bearing.with.respect.to.magnetic.
north.
Regional.Airworthiness.Engineer.(Canadian) RAE
The.radome.is.the.protective.cover.on.the.aircraft. Radome nose that fits over the weather radar system
antenna..The.radome.is.transparent.at.radar. frequencies.
Requirements Analysis Folder RAF
Radio.Altimeter.Indicator RAI
Receiver.Autonomous.Integrity.Monitoring RAIM
Radio.Altimeter.(also.RA,.RA.DA.LT,.LRA,.LRRA) RALT
Random.Access.Memory..Generally.used.to. RAM
describe.read/write.integrated.circuit.memory.
Remote.Area.Precision.Positioning.System RAPPS
(.1.).Row.Address.Strobe.. RAS
(.2.).Reference.Approach.Speed
Required Communication Performance RCP
RAM.Air.Temperature.is.the.temperature.of.the.air. RAT
entering.an.air.scoop.inlet..It.is.a.factor.in.engine.
performance.
Rockwell.Collins RC
Rate.of.Climb R/C
Resistor-Capacitor.network R-C
93
Rack.Connectors.and.Wiring R-C&W
Remote.Center.Air/Ground.Station RCAG
Remote.Charge.Converter RCC
Radio Control Equipment RCE
Rockwell.Collins.Flight.Dynamics RCFD
(.1.).Radio.Communications.Link.. RCL
(.2.).Recall
Remote Communications Outlet RCO
Rockwell.Collins.Management.Authorization. RC-MAP
Process
(.1.).Radio.Control.Panel. RCP
( 2 ) Required Communications Performance
Routing.and.Circuit.Restoral RCR
Rockwell.Collins.Technical.Consistent.Process RC-TCP
Remote.Control.Unit RCU
Receiver RCVR
Research.and.Development R&D
R-Channel.used.for.data Rd
Regional.Domestic.Air.Route.Area RDARA
(.1.).Routing.Domain.Confederation.. RDC
(.2.).Remote.Data.Concentrator
Routing.Domain.Format RDF
Routing Domain Identifier RDI
Radio.Distance.Magnetic.Indicator RDMI
Radar.Data.Processing.(system) RDP
Radar RDR
Radio.Determination.Satellite.Service RDSS
(.1.).Receiver/Decoder.Unit.. RDU
(.2.).Remote.Display.Unit
Requirements Development and Validation RDV
Rapid.Deployment.Voice.Switch RDVS
Reliability.Evaluation.and.Corrective.Action. RECAP
Program
94
Reference REF
Reflection REFL
This.is.a.measurement.of.the.ability.of.a.target.to. Reflectivity
reflect the energy from a radar beam. Factor (Z)
The.bearing.of.a.ground.station.relative.to.the. Relative
direct.ion.the.aircraft.nose.points,.or.the.direction. Bearing
of.an.aircraft.to.or.from.an.NDB.
Relative REL
A.probability.of.occurrence.greater.than.1.x.10^- Remote
7 but less than or equal to 1 x 10^-5 per hour of
flight, or per event (e.g. takeoff, landing)
Reliability.Enhancement.Program REP
( 1 ) Request . REQ
( 2 ) Required/Requirement
Residual.Error.Rate RER
A.display.indication.given.to.the.pilot. Resolution
recommending.a.maneuver.to.increase.vertical. Advisory
separation.relative.to.an.intruding.aircraft..A. resolution advisory is also classified as corrective
or.preventive.
Restriction RESTR
Resynchronizing RESYNCING
(.1.).Rapid.Exit.Taxiway.. RET
(.2.).Reliability.Evaluation.Test
Remote.Electronics.Unit REU
Radio Frequency. A general term for the range of RF
frequencies above 150 kHz, to the infrared region
(1012.Hz).
Request for Comments RFC
Reconfigurable Flight Deck RFD
( 1 ) Radio Frequency Interference . RFI
( 2 ) Request For Information
Request For Proposal RFP
Requirements Functional allocation Synthesis RFSIVV
Integration Verification Validation
9_
Request For Technical Proposal RFTP
Radio Frequency Unit RFU
Red/Green/Blue RGB
Review.of.the.General.Concept.of.Separation. RGCSP
Panel
Radio.Handler RH
Range.and.Height.Indicator RHI
Response.on.Handoff RHO
Reduced.Horizontal.Separation.Minima RHSM
(.1.).Right.Inboard.. RIB
(.2.).Routing.Information.Base
Routing.Information.Protocol RIP
Recorder.Independent.Power.Supply RIPS
Reduced.Instruction.Set.Computer RISC
Radio.Interface.Unit RIU
Regional.Jet RJ
Red.Label R/L
Radio.Altitude RA
Rijksluchtvaartdienst.(The.Netherlands’.Civil. RLD
Aviation.Agency)
Response.on.Link.Establishment RLE
Ring.Laser.Gyros RLG
Relative.Location.Indicator RLI
Ring.Laser.Gyro RLP
(.1.).Reliable.Link.Source.. RLS
(.2.).Remote.Light.Sensor
Relay RLY
Reliability.and.Maintainability R&M
Reliability.Maintainability.and.Availability RM&A
Remote.Maintenance.Access. RMA
Radio.Magnetic.Indicator RMI
RM.Management.System RMMS
96
(.1.).Radio.Management.Panel. RMP
(.2.).Remote.Maintenance.Panel
Remote RMT
Area.Navigation R-NAV
Range RNG
Range.Arc RNGA
Required Navigation Performance. A statement RNP
of.the.navigation.performance.necessary.for. operation within a defined airspace.
Receive.Not.Ready RNR
Radio.Nav.Tuning.Panel RNTP
( 1 ) Radio Operator . RO
( 2 ) Roll Out
Recognized Operating Agency ROA
Right Outboard ROB
( 1 ) Rate Of Climb . ROC
( 2 ) Rate of Operational Capability
Rate Of Descent ROD
Roll ROL
Movement.about.the.longitudinal.(front.to.back). ROLL
axis.of.the.aircraft.
Rollout starts from the first contact of the wheels Rollout
with the runway and finishes when the airplane
has.slowed.to.a.safe.taxi.speed.(in.the.order.of.
30.knots).
( 1 ) Read Only Memory . ROM
( 2 ) Rough Order of Magnitude
Remain Over Night RON
Runway Occupancy Time ROT
Relocatable Over-The-Horizon Radar ROTHR
An ordered group of flight reference points ROUTE
(Airports,.Navaids,.Geographic.Reference.Points,. etc.) representing part or all of a planned flight
path.
9_
Routing.Protocol RP
Remote.Power.Distribution.Unit RPDU
Rapid.Process.Improvement RPI
Revolutions.Per.Minute RPM
Recognized Private Operation Agency (CCITT) RPOA
Receiver.Ready RR
Router.Reference.Implementation RRI
Reliable Sequencing Delivery Confirmation RSDP
Protocol
Regional.Subnetwork RSN
( 1 ) Required Surveillance Performance . RSP
(.2.).Reversion.Switch.Panel
Received.Signal.Strength.Indicator RSSI
(.1.).Radio.Telecommunication.. RT
(.2.).Receiver-Transmitter.(R/T)..Also.referred.to.
as.a.transceiver..(See.T/R)
(.1.).Receiver-Transmitter.Antenna.. RTA
( 2 ) Required Time of Arrival
Real-Time.Clock RTC
Radio.Technical.Commission.for.Aeronautics RTCA
RTCA.Document.160,.Environmental.Conditions. RTCADO-_60
and Test Procedures for Airborne Equipment,
Issued.12/04/89
RTCA.Document.178,.Software.Considerations. RTCADO-___
in Airborne Systems and Equipment Certification,
issued.03/22/85
Route RTE
Radio.telephony RTF
Real-Time.Interrogate RTI
Radio.Transmission.Module RTM
Reliability.Test.Plan RTP
Rejected.Takeoff RTO
Real-Time Operating System RTOS
9_
Radio.Tuning.Panel RTP
Remote.Transmitter.Receiver.Site RTR
( 1 ) Request To Send . RTS
(.2.).Real-Time.Studio
Required Total System Performance RTSP
Rotable.Total.Service.Solutions. RTSS
Run-Time Type Identification RTTI
Radio.Tuning.Unit:.A.control.for.tuning. RTU
communication.and.navigation.radios.
Real-Time.Workshop RTW
Rack.Unit RU
The.act.of.inadvertently.crossing.the.runway. Runway
holding.point.without.ATC.clearance. Incursion
Rotary.Voltage.Differential.Transducer RVDT
Runway.Visual.Range RVR
Reduced.Vertical.Separation.Minimum RVSM
Read/Write R/W
Runway RW
Read-Write.Memory..A.memory.in.which.each.cell. RWM
is.selected.by.applying.appropriate.electrical.input.
signals,.and.the.stored.data.may.be.either.sensed.
at.the.appropriate.output.terminal.or.changes.in.
response.to.other.electrical.input.signals.
Reactive.Windshear.System RWS
Runway RWY
Receiver Rx
Return.to.Zero RZ
South S
Segment.0 S0
Segment.1 S_
(.1.).Selective.Availability.. SA
(.2.).Situation.Awareness
Service.Access.Area.(VHF.Cat.B.ACARS) SAA
99
Special Aircraft/Aircrew Authorization Required SAAAR
Secondary.Attitude.Air.Data.Reference.Unit SAARU
Society.of.Aeronautical.Engineers SAE
System.Architecture.and.Interface SAI
System.Address.Label.(ARINC.429) SAL
Small.Aircraft.Manufacturers.Association SAMA
Service.Access.Points SAP
Search.and.Rescue SAR
Standards And Recommended Practices (ICAO) SARPS
(.1.).Stability.Augmentation.System. SAS
(.2.).Station.Address.Set
(.1.).Static.Air.Temperature.is.the.total.air. SAT
temperature.corrected.for.the.Mach.effect..
Increases.in.airspeed.cause.probe.temperature.
to.rise.presenting.erroneous.information..SAT.is.
the.outside.air.temperature.if.the.aircraft.could.be.
brought.to.a.stop.before.measuring.temperatures...
(.2.).System.Acceptance.Test
Satellite.Communications SATCOM
Satellite.Navigation SATNAV
Service.Bulletin SB
Space.Based.Augmentation.System SBAS
Single.Board.Computer SBC
Schematic.Block.Diagram SBD
Single.Bit.Error SBE
Step.Climb S/C
Special.Committee SC
Angle of the weather reflectivity information with SCAN ANGLE
respect.to.the.aircraft.heading.
Special.Category SCAT
Special.Category.1.Approach.System SCAT-_
( 1 ) Specification Control Drawing . SCD
(.2.).System.Category.Diagram
_00
Satellite.Control.Data.Unit SCDU
Servicing.Customers.Engineer SCE
Software Configuration Index Drawing SCID
Radio.Altimeter.Indicator SCIU
Software Configuration Management SCM
Single.Carrier.Per.Channel SCPC
Supply.Chain.Quality.Assurance SCQA
Special Certification Review SCR
Single.Channel.Simplex..A.communication. SCS
system.that.uses.simplex.
Small.Computer.System.Interface SCSI
System Configuration Table SCT
(.1.).Signal.Conditioning.Unit. SCU
(.2.).Signal.Conversion.Unit
(.1.).Side.Display.. SD
(.2.).Storm.Detection..It.is.the.designation.for.
the.hourly.transmitted.radar.observations.from.
the.NWS.and.ARTCC.radars..Individual.SDs.
are.combined.and.transmitted.once.an.hour.as.
collectives.(.SDUs).over.the.aviation.teletype.
circuits.
System.Design.&.Analysis.Harmonization. SD&AHWG
Working.Group
(.1.).Standard.Disk.Drive.. SDD
(.2.).Sensor.Display.Driver.
(.3.).System.Description.Document
Simplified Directional Facility SDF
Source Destination Identifier: A bit field contained SDI
in.serial.data.words.that.tell.the.source.or.
destination.of.the.data.in.that.word.
(.1.).Speaker.Drive.Module. SDM
(.2.).Service.Delivery.Management
Surveillance.Data.Processing SDP
Synchronous.Dynamic.Random.Access.Memory SDRAM
Supplier Data Requirements List SDRL
_0_
(.1.).Satellite.Data.Unit.. SDU
(.2.).Sensor.Display.Unit..
(.3.).Service.Data.Unit
Seat.Electronics.Box SEB
Secondary SEC
Secondary.EICASD.is.play SED
(.1.).Software.Engineering.Institute.. SEI
(.2.).Standby.Engine.Indicator
(.1.).Select.. SEL
( 2 ) Selector Identifier
Selective.Calling.System..A.system.used.in. SELCAL
conjunction.with.HF.and.VHF.communication.
systems.that.allows.a.ground-based.radio.
operator.to.call.a.single.aircraft.or.group.of.aircraft.
without.the.aircraft.personnel.monitoring.the. ground station radio frequency.
Sensor SENS
An instruction given to the TCAS equipment for Sensitivity
control.of.its.threat.volume.. Level
Command
Secondary.Electrical.Power.Contactor SEPC
Stress.Evaluation.Prediction.Program SEPP
Serial.Number SERNO
(.1.).Single.Event.Upset.. SEU
(.2.).Seat.Electronics.Unit
Special.Federal.Aviation.Regulation SFAR
Subsystem.Fault.Detection.Function SFDF
Supplier Furnished Equipment SFE
Signal.Generator SG
Standard.Generalized.Markup.Language. SGML
Surface.Guidance.System SGS
(.1.).Selective.Interrogation.. SI
(.2.).Standby.Instruments..
(.3.).Supporting.Interrogator..
(.4.).Supplementary.Information
_0_
Standard.Instrument.Approach.Procedure SIAP
Secondary.Surveillance.Radar.Improvements.and. SICAS
Collision.Avoidance.System
Secondary.Surveillance.Radar.Improvements. SICASP
And.Collision.Avoidance.System.Panel
Standard.Instrument.Departure SID
The.reproduction.of.sounds.in.a.headset.(or. Sidetone
speaker).from.the.transmitter.of.the.same.
communication.set..This.allows.a.person.to.hear.
his/her.own.voice.when.transmitting.
(.1.).Standard.Interchange.Format.. SIF
(.2.).System.Integration.Facility
Significant Meteorological Observations SIGMETS
(.1.).Systems.Integration.Lab.. SIL
(.2.).Service.Information.Letter
A.communication.operation.that.uses.only. Simplex
a.single.channel.for.transmit.and.receive.
operations..Communications.can.take.place.in.
only.one.direction.at.a.time.
Signal-plus-Noise-plus-Distortion.to.Noise-plus- SINAD
Distortion-Ratio
Single.In-line.Package SIP
Societe.Internationale.de.Telecommunications. SITA
Aeronautiques
System.Integration.Test.Plan/Description SITP/D
System.Integration.and.Test SIT
System.Integration.Test.Report SITR
Satellite.Interface.Unit SIU
Skip SKP
A radio wave that is reflected by the ionosphere. Skywave
Depending.upon.the.state.of.the.ionosphere,.the.
reflected radio wave may propagate along the
layer of the ionosphere or be reflected at some
angle..It.is.also.known.as.ionospheric.or.indirect.
wave.
_03
Sensitivity.Level SL
Sub-Level S/L
Service.Level.Agreement SLA
The.line-of-sight.distance.from.the.aircraft.to.a. Slant Range
DME.ground.station.
Synchronous.Link.Control SLC
System.Level.Health SLH
System.Level.Interface SLI
Standard.Length.Message SLM
Source.Lines.of.Code SLoC
Side-Lobe.Suppression..A.system.that.prevents. SLS
a.transponder.from.replying.to.the.side-lobe.
interrogations.of.the.SSR..Replying.to.side-lobe.
interrogations.would.supply.false.replies.to.the.
ATC.ground.station.and.obscure.the.aircraft.
location.
System.Level.Use.Case SLUC
( 1 ) Service Level Verifier . SLV
(.2.).Sync.Lock.Valve
System.Monitor SM
Surface.Movement.Advisor SMA
System.Management.and.Communication SMC
Surface.Mount.Device SMD
Switched.Multi-megabit.Data.Service SMDS
System.Management.Entity SME
Surface.Movement.Guidance.and.Control. SMGCS
Systems
Standard Message Identifiers SMI
Seamless.Pipe.and.Tube SMLS
Spectrum.Monitoring.System SMS
_04
(.1.).Aileron/Rudder.Servo.Mount.. SMT
(.2.).Elevator.Servo.Mount..
(.3.).Servo.Mount..
(.4.).Stabilizer.Trim.Servo.Mount..
(.5.).Standard.Message.Text..
(.6.).Station.Management..
(.7.).System.Maintenance.Task
Subnetwork SN
System.Network.Architecture SNA
Subnetwork.Access SNAC
Subnetwork.Access.Protocol SNAcP
Subnetwork.Connection.Reference SNCR
Subnetwork.Dependent.Convergence.Function SNDCF
Subnetwork.Dependent.Convergence.Protocol SNDCP
Subnetwork.Independent.Convergence.Function SNICF
Subnetwork.Link.Establishment SNLE
Simple.Network.Management.Protocol SNMP
Subnetwork.Point.of.Attachment SNPA
Subnetwork.Protocol.Data.Unit SNPDU
Signal-to-Noise.Ratio SNR
Subnetwork.Service.Data.Unit SNSDU
Safety Of Flight SOF
Start.of.Header SOH
System Operator Instructions SOI
Satellite Operational Implementation Team SOIT
Software Operator Manual SOM
Statement of Operational Need SON
Standard Operating Procedure SOP
Standard Operating Procedure Amplified SOPA
Silicon On Sapphire SOS
Statement Of Work SOW
Space SP
Special Purpose Automatic Test Equipment SPATE
_0_
Statistical.Process.Control SPC
Speed SPD
Seller Purchased Equipment SPE
Represented.by.the.symbol.c.and.has.a.value.. Speed of Light
of.2.9979250.x.108.meters/second.or.
983,571,194.feet/second.
Special Position Identification SPI
Designation.for.a.transponder.ident.pulse. SPIP
Speaker SPKR
(.1.).Stabilizer.Position.Modules.. SPM
(.2.).Surface.Position.Monitor..
(.3.).Support.Plan.Manager
Refers.to.a.display.presentation.that.radiates. Spoking
outward.from.the.display.origin.like.the.spokes.on.
a.wagon.wheel.
Sync.Phase.Reversal..(Term.is.used.in.Mode.S. SPR
transponders.)
(.1.).Sensor.Processing.Subsystem.. SPS
(.2.).Standard.Positioning.Service
Squelch SQ or Sql
Service.Quality SQ
Service.Quality/Billing.Processor SQB
Service.Quality.Data SQD
Structured.Query.Language SQL
Signal.Quality.Parameter SQP
A squall line is a line of thunderstorms and Squall Line
developing.thunderstorms.
Reply.to.interrogation.signal.(XPD). Squawk
A.control.and/or.circuit.that.reduces.the.gain.in. Squelch
response of a receiver. The squelch is used to
eliminate.the.output.noise.of.the.receiver.when.a.
signal.is.not.being.received.
_06
(.1.).The.random.pulse.pairs.generated.by.the. Squitter
ground station as a filler signal. .
( 2 ) The transmission of a specified reply
format.at.a.minimum.rate.without.the.need.to.be.
interrogated..(Filler.pulses.transmitted.between.
interrogations).[XPD]...
(.3.).Spontaneous.Transmission.generated.once.
per.second.by.transponders.
Service Request SR
Software Requirements And Design Description SRADD
Static.Random.Access.Memory SRAM
Systems Requirements Document SRD
Selective.Reject SREJ
Selective.Reject.Mode SRM
Short.Range.Navigation-term.used.to.encompass. SRN
VOR/LOC/DME/MB Navigation, or a sub-set
there-of.
Selected.Reference.Point SRP
Satellite.Recognition.Receiver SRR
Satellite.Receiver.Transmitter SRT
Shop.Replaceable.Unit SRU
ShipSet S/S
System.Safety.Assessment SSA
Single.Sideband..An.AM.signal.that.has.a. SSB
reduced.carrier,.with.the.power.applied.to.a.single.
sideband..Since.the.bandwidth.of.the.information-
carrying.signal.is.reduced,.a.better.signal-to-noise.
ratio.is.obtained.at.the.receiver.
Solid-State.Cockpit.Voice/Data.Recorder SSCV/DR
Solid-State.Cockpit.Voice.Recorder SSCVR
Static.Source.Error.Correction SSEC
Solid-State.Flight.Data.Recorder SSFDR
Sign.Status.Matrix:.A.set.of.bits.in.an.ARINC.label. SSM
that.tell.the.status.of.that.label..The.status.can.be.
normal,.fail,.test.or.no.computed.data.(NCD).
_0_
System.Signal.Processor SSP
Secondary.Surveillance.Radar..A.radar-type. SSR
system that requires a transponder to transmit a
reply.signal.
Single.Sideband.Suppressed.Carrier..A.SSSC. SSSC
signal is a band of audio intelligence frequencies
that.have.been.translated.to.a.band.of.radio. frequencies without distortion of the intelligence
signal.
Subsequent Signal Unit SSU
Statistics ST
Station sta
Stabilizer STAB
Represents.the.mean.or.average.properties.of. Standard
the.atmosphere..At.sea.level.static.pressure.is. Atmosphere
29.92.In.Hg.and.temperature.is.+15°C.
A.DME.mode.that.applies.power.to.the.DMERT. Standby Mode
but.the.unit.does.not.transmit.
Standard.Terminal.Arrival.Routes STAR
(.1.).Standard.Terminal.Automation.Replacement. STARS
System..
(.2.).Status.Tracking.And.Reporting.System
Flush-mounted.openings.in.the.skin.of.the.aircraft. Static Ports
fuselage.used.to.sensestatic.pressure.
Ambient.atmospheric.pressure.or.static.pressure. Static Pressure
is.the.force.per.unit.area.exerted.by.the.air.on.the.
surface.of.a.body.at.rest.relative.to.the.air.
RAM.constructed.of.bistable.transistor.elements.. Static RAM Memory cells do not require refreshing. (See
Dynamic.RAM.)
A.correction.applied.to.static.source.pressure. Static Source
measurements.to.partly.or.completely.correct. Error (SSEC)
for pressure errors that are caused by airflow
changes..It.is.computed.as.a.function.of.Mach.
and.altitude.based.on.measured.errors.for.a.
particular.static.system.
Systems.Test.Bed STB
_0_
Standby.Instruments STBY
(.1.).Sensitivity.Time.Control..A.control.circuit. STC
used.in.radar.applications.to.control.receiver.gain.
with.respect.to.time... ( 2 ) Supplemental Type Certificate
Stabilizer.Trim.Control.Module. STCM
(.1.).Standard.. STD
(.2.).System.Technical.Description
Standby.Instruments STDBY
Synchronized.Time.Division.Multiple.Access STDMA
Step.Climb STEPCLB
An AHRS test mode, where “XX” can be OA STIM XX
(Sequence of all tests), 01 (Roll tests), 02 (Pitch
tests),.03.(Heading.test).
Satellite.Telecommunications.Intermediate.Unit STIU
Serial.Transition.Module STM
Short.Takeoff.and.Landing STOL
Standard.Temperature.and.Pressure STP
System.Trouble.Report STR
Stable Time Subfield STS
Start.of.Text STX
Signal.Unit SU
Special.Use.Airspace SUA
Yaw.Damper.Actuator SUL
(.1.).Aileron/Elevator/Rudder.Servo. SUO
(.2.).Servo.Actuator
A.receiver.in.which.the.incoming.RF.signal.is. Super-
mixed to produce a lower intermediate frequency. heterodyne
Receiver
A.pulse.used.to.disable.L-band.avionics.during. Suppressor
the.transmitting.period.of.another.piece.of.L-band. Pulse
airborne equipment. It prevents the other avionics
aboard.the.aircraft.from.being.damaged.or.
interfered.with.by.the.transmission.and.any.noise.
associated.with.that.transmission.
_09
Regional.Supplementary.Procedures SUPPS
(.1.).Autothrottle.Servo.. SUT
(.2.).Stabilizer.Trim.Servo..
(.3.).System.Under.Test
Space.Vehicle SV
(.1.).Service.. SVC
(.2.).Switched.Virtual.Circuit
Smart.Video.Distribution.Unit SVDU
Servo SVO
Service.Readiness.Review SVRR
Synthetic.Vision.System SVS
Servo.Throttle SVT
Satellite.Voice.Unit SVU
Software S/W
Severe.Weather.Avoidance.Program SWAP
System.Wide.Information.Management SWIM
Short.Wavelength.Infra-Red SWIR
Software.Integration.and.Test SWIT
Software Requirements Document SWRD
Software.Test.Readiness.Review SWTRR
Super.Extended.Graphics.Array SXGA
Synchronizing SYNC
Synthetic.Vision.Application SVA
System sys
System Identifier SYS
System.Category.B.(FAA.Message.Format) SYSCAT-B
System Configuration Item SYSCI
Traffic Advisory: TCAS information given to the TA
pilot.pertaining.to.the.position.of.another.aircraft.
in.the.immediate.vicinity.
(.1.).Terrain.Awareness.Display.. TAD
(.2.).Transport.Airplane.Directorate
__0
(.1.).Test.Access.Control.. TAC
(.2.).Thrust.Asymmetry.Compensation..
(.3.).Triacetate.Cellulose
The.Tactical.Air.Navigation.System.that.provides. TACAN
azimuth.and.distance.information.to.an.aircraft. from a ground station (similar to VOR-DME,
however, in the UHF Frequency band).
Tachometer Tach
Test.Access.Control.Interface.Unit TACIU
Terminal Area Forecast (ICAO) TAF
Thermal.Anti-Icing TAI
(.1.).Terminal.Area.Productivity. TAP
(.2.).Tailored.Arrival.Procedure
Trials.ATN.Router TAR
An.aircraft.within.the.surveillance.range.of.TCAS. Target
True.Airspeed TAS
(.1.).Total.Air.Temperature..The.air.temperature. TAT
including.heat.rise.due.to.compressibility...
(.2.).True.Air.Temperature
Terminal Air Traffic Control Automation TATCA
TAU is the minimum time a flight crew needs to TAU
discern.a.collision.threat.and.take.evasive.action..
It.represents.the.performance.envelope.(speed.
and.path.of.aircraft).divided.by.the.closure.rate.of.
any.intruder.aircraft.(TCAS).
Terrain.Awareness.Warning.System TAWS
Transfer.Bus.Breaker TBB
To.Be.Determined TBD
Time Between Overhauls TBO
( 1 ) To Be Specified . TBS
(.2.).To.Be.Supplied
(.1.).Transport.Connection.. TC
( 2 ) Type Certificate
Top-of-Climb T/C
___
(.1.).Terminal.Control.Area. TCA
(.2.).Throttle.Control.Assembly
Traffic Alert Collision Avoidance System: TCAS
Transponder.system.that.talks.to.other.aircraft.
and.determines.their.altitude,.rate,.vertical.speed,.
distance.and.bearing.
A.baseline.system.that.provides.a.warning.(TA).to. TCAS I
the flight crew of the presence of another aircraft
(potential.collision.threat).within.the.surveillance.
area..No.avoidance.maneuver.is.suggested.
A collision avoidance system providing traffic TCAS II
information.(within.approximately.30.nmi.of.
the aircraft) to the flight crew, in addition to the
resolution.advisories.(RA).(for.vertical.maneuvers.
only). A TCAS II-equipped aircraft will coordinate
with TCAS II-equipped intruder aircraft to provide
complementary.maneuvers.
Turbine.Case.Cooling TCC
Type Certificate Data Sheet TCDS
Terrain.Clearance.Floor TCF
Technical.Coordination.Meeting TCM
Test.Content.Management.System TCMS
TACAN TCN
Transmission.Control.Protocol TCP
Transport.Control.Protocol/Internet.Protocol TCPIP
Throttle.Control.Quadrant TCQ
Touch.Control.Steering TCS
(.1.).TACAN.Control.Unit.. TCU
(.2.).Telephone.Conversion.Unit
Temperature Controlled Crystal Oscillator TCXO
Top-of-Descent T/D
Traffic Display: A feature of the TCAS that shows TD
TCAS traffic.
Tower.Data.Link.System TDLS
___
In.the.Time.Division.Multiplex.Systems.a.common. TDM
carrier.is.shared.to.transmit.multiple.messages.
(to.multiple.receivers).by.time.sharing.the.carrier.
between.the.message.sources.
Time.Division.Multiplex.Access..When.multiple. TDMA
transmitters.are.using.a.single.carrier.to.transmit.
to.a.single.receiver,.the.carrier.is.time.shared.
between.each.of.the.transmitters,.so.the.multiple.
messages.are.not.garbled.at.the.receiver.
Time Dilution Of Precision. A term used to TDOP
describe.the.error.introduced.by.variances.in.the.
calculated.time.
Transponder TDR
Tactical.Data.Radio.System TDRS
Terminal.Display.System TDS
Tower.Data.Services.Terminal TDST
Terminal.Doppler.Weather.Radar TDWR
Touch.Down.Zone TDZ
Test Equipment TE
Thermo-Electric.Cooler TEC
Text Element Identifiers TEI
Temperature TEMP
A.sensor.protruding.into.the.airstream.to.sense. Temperature air temperature. Requires correction to get static Probe
air.temperature.
Terminal TERM
(.1.).Terminal.En.Route.Procedures.. TERPS
(.2.).Terminal.Instrument.Procedures
Trials.End.System.(for.ATN) TES
Task.Force.3 TF3
Traffic TFC
Traffic Flow Management TFM
Total Field Of View TFOV
Temporary.Flight.Restriction TFR
__3
Thin.Film.Transistor TFT
Trivial.File.Transfer.Protocol TFTP
Terrestrial.Flight.Telephone.System TFTS
(.1.).Timer-VDL.Management.Entity. TG
(.2.).Transmission.Gate
GS’s.Maximum.Time.Between.Transmissions TG 3
Maximum.Time.Between.GSIF’s.Timer TG 4
Turbulence.Gain.Control TGC
Maximum Link Overlap Timer TGS
Target:.A.weather.radar.annunciator.that.indicates. TGT
weather.ahead.
True.Heading THDG
Threshold THLD
Thrust THR
Throttle.Hold THRHOLD
A target that has satisfied the threat detection Threat logic and thus requires a traffic or resolution
advisory.(TCAS).
Trimmable.Horizontal.Stabilizer.Actuator THSA
(.1.).Telecommunications.Industry.Association.. TIA
(.2.).Type.Inspection.Authorization.
True.Indicated.Airspeed TIAS
Type.Inspection.Report TIR
Traffic Information Service TIS
Traffic Information System-Broadcast TIS-B
Track.Angle TK
Track.Angle.Error TKE
Top-Level T/L
Terminal.Location.(ACARS/AFEPS) TL
Thrust.Lever.Angle TLA
Target.Language.Compiler TLC
Telemetry.Word TLM
__4
Target.Level.of.Safety TLS
Timer-Media.Access.Control TM
Traffic Management Advisor TMA
Thrust.Management.Computer TMC
Thrust.Management.Computer.Function TMCF
Thrust.Management.Computer.System TMCS
Thrust.Management.Function TMF
(.1.).Thrust.Management.System. TMS
( 2 ) Traffic Management System
Traffic Management Unit TMU
(.1.).True.North.. TN
(.2.).Twisted.Nematic
Take Off TO
(.1.).Top.of.Climb.. TOC
(.2.).Transfer.of.Communications
Top.of.Descent TOD
Takeoff.Engine.Pressure.Ratio TO EPR
Indicates.whether.the.omnibearing.selected.is.the. TO/FROM
course to or from the VOR ground station. Indicator
Take Off, Go-Around. Also seen as TO/GA. TOGA
Take Off Engine Fan Speed TO N_
Terms.of.Reference TOR
Total TOT
The.point.at.which.the.predetermined.glide.path. Touchdown
intercepts.the.runway.
Time Of Week TOW
Tire.Pressure.Monitor.Unit TPMU
Test.Point TP
Transport.Protocol.Class.4 TP4
Transport.Protocol.Data.Unit TPDU
Terminal.Permission.List.(ACA.RS/AFE.PS) TPL
Technical.Performance.Management TPM
___
Transponder TPR
Throttle.Quadrant.Assembly TQA
Temporary.Revision..A.document,.printed.on. TR
yellow.paper.that.temporarily.amends.a.page.or.
pages.of.a.component.maintenance.manual.
(.1.).Thrust.Reverser.. T/R
(.2.).Transceiver.(see.RT).
(.3.).Transmitter-Receiver
(.1.).Temporary.Reserved.Airspace. TRA
(.2.).Thrust.Reduction.Altitude
Terminal.Radar.Approach.Control TRAC
(.1.).The.actual.path,.over.the.ground,.traveled.by. Track
an.aircraft.(navigation)...
(.2.).In.this.mode.the.DME.transmits.a.reduced.
pulse pair rate after acquiring lock-on (DME). .
(.3.).Estimated.position.and.velocity.of.a.single.
aircraft.based.on.correlated.surveillance.data.
reports.(TCAS).
Terminal.Radar.Approach.Control TRACON
Test.and.Repair.Control.System..An.automated. TRACS
data.retrieval.system..TRACS.functions.include:.
1).provide.the.location.of.any.given.unit.at.any. time; 2) provide an efficient flow of work to and
from test stations; 3 ) provide quick access to
quality information generated by the actual testing
process.(performed.by.the.technician);.4).provide.
statistical.and.historical.data.regarding.throughput.
time.for.products,.failure,.yield.rates,.WIP,.etc.
Information.given.to.the.pilot.pertaining.to.the. Traffic Advisory
position.of.another.aircraft.in.the.immediate.
vicinity..The.information.contains.no.suggested. maneuvers. (Traffic advisory airspace is 1200 feet
above.and.below.the.aircraft.and.approximately.
45.seconds.distant.with.respect.to.closure.speed.
of.the.aircraft.).[TCAS]
__6
The number of transponder-equipped aircraft Traffic Density
within.R.nautical.miles.(nmi).of.own.aircraft,.
divided by x (R nmi) 2. Transponder-equipped
aircraft.include.Mode.S.and.ATC.RBS.Mode.A.
and.Mode.C,.and.excludes.own.aircraft..(TCAS)
Transition TRANS
A.receiver.and.transmitter.combined.in.a.single. Transceiver
unit..Same.as.RT.
Avionics equipment that returns an identifying Transponder
coded.signal.
Turbulence.(TURB):.A.weather.radar.warning.of. TRB
approaching.turbulence.
Transit.Routing.Domain TRD
Track:.The.course.the.aircraft.is.traveling.along. TRK
the.ground.with.respect.to.true.North.
Tracking and Resolution Of Obsolete Parts TROOP
Mode.S.Transponder TRP
(.1.).Test.Readiness.Review.. TRR
(.2.).Test.Rejection.and.Repair
Time.Reference.Scanning.Beam..The. TRSB
international.standard.for.MLS.installations.
( 1 ) Transformer Rectifier Unit . TRU
(.2.).True
The.true.velocity.of.the.aircraft.through.the. True Airspeed
surrounding.air.mass.
The.exact.distance.above.mean.sea.level. True Altitude
(corrected.for.temperature).
The.bearing.of.a.ground.station.with.respect.to. True Bearing
true.north.
The.direction.of.the.north.pole.from.the.observer. True North
(.1.).Time.Source.. TS
(.2.).Transport.Service. ( 3 ) Traffic Synchronization
(.1.).Tail.Strike.Assembly. TSA
(.2.).Technical.Service.Agreement
___
Transport.Service.Access.Point TSAP
Term.Service.Commitment TSC
Transport.Service.Data.Unit TSDIU
Total.System.Error TSE
Trimble.Standard.Interface.Protocol TSIP
Autothrottle.Servo.Mount.(without.Clutch) TSM
(.1.).Transmitted.Signal.Power.. TSP
(.2.).Twisted.Shielded.Pair
Technical Standard Order. Every unit built with a TSO
TSO name plate must meet TSO requirements.
TSO operating temperature extremes are not the
same.as.the.manufacturing.burn-in.limits.
Technology.Support.and.Services TSS
Time.Source.Transition.Module TSTM
(.1.).Test.Tools.. TT
(.2.).Total.Temperature
Total.Inlet.Temperature.(Engine) TT_
Time.To.First.Fix TTFF
Time.To.Go:.The.time.from.present.position.to. TTG the next navigation fix based on current aircraft
ground.speed.
Transistor-Transistor.Logic TTL
TCAS.II.Receiver/Transmitter TTR
Time.To.Station,.an.indication.that.displays.the. TTS
amount.of.time.for.an.aircraft.to.reach.a.selected.
DME.ground.station.while.traveling.at.a.constant.
speed.
Tele.typewriter TTY
Smart.Tapping.Unit TU
Test.Unit.Adapters TUA
Turbulence TURB
___
The U.S. National Weather Service defines light Turbulence
turbulence.as.areas.where.wind.velocity.shifts.
are.0.to.19.feet.per.second.(0.to.5.79.meters.
per.second).and.moderate.turbulence.as.wind.
velocity.shifts.of.19.to.35.feet.per.second.(5.79.to.
10.67.meters.per.second).
Turbine.Vane.and.Blade.Cooling TVBC
Turbine.Vane.Cooling TVC
Total.Vertical.Error TVE
Test.Vector TVEC
(.1.).Terminal.Weather.Data.Link. TWDL
(.2.).Two.Way.Data.Link
Terminal.Doppler.Weather.Radar TWDR
Terminal.Weather.Information.for.Pilots TWIP
Tailwind TWND
Technical.Work.Program TWP
Turbulence.Weather.Radar TWR
Traveling.Wave.Tube TWT
Transmit.(see.XMIT):.An.annunciation.that.may. TX
be.displayed.on.the.Communications.Radio.
Controller.(CTL,.CDU,.RTU).while.a.radio.signal.
is.being.transmitted.
(.1.).Unnumbered.Acknowledgment.. UA
(.2.).User.Application
Universal.Asynchronous.Receiver/Transmitter UART
Universal.Avionics.Systems.Corp. UASC
Universal.Access.Transceiver UAT
Unmanned.Air.Vehicle UAV
Utility.Bus UB
Uplink Block Identifier UBI
User.Computer.Interface UCI
Uniform.Chromaticity.Scale UCS
__9
User.Data..The.N-User.data.may.also.be. UD
transferred between peer network members (OSI
Model) as required.
User.Datagram.Protocol UDP
Universal.Flight.Data.Recorder UFDR
Ultra-High Frequency. The portion of the radio UHF
spectrum.from.300.MHz.to.3.GHz.
Unnumbered.Information UI
Upper flight Information Region UIR
Uplink UL
Underwater.Locator.Beacon ULB
Unit.Load.Device ULD
User-Modifiable Information UMI
Unified Modeling Language UML
User-Modifiable Software UMS
User-Modifiable Software Development Tool UMSDT
Universal.Mount UMT
A DME channel without a corresponding VOR or Unpaired
ILS frequency. Channel
The.radio.transmission.path.upward.from.the. Uplink
earth.to.the.aircraft.
Universal.Platform UP
User.Preferred.Route UPR
Universal.Platform.Resource.Management UPRM
UPS.Management.System UPSMS
Uninterruptible.Power.Supply UPS
United.States.Air.Force USAF
Upper.Sideband.is.the.information-carrying.band. USB
and is the frequency produced by adding the
carrier frequency and the modulating frequency.
Unstabilized USTB
Universal.Time.Coordinated.(French) UTC
Universal.Trigger.Engine UTE
__0
Unshielded.Twisted.Pair UTP
Unit.Under.Test UUT
Upper.Sideband.Voice UV
Unique Word UW
(.1.).Velocity.. V
(.2.).Volt
Critical.engine.failure.velocity..A.pilot.selectable. V ( _ )
speed.on.the.PFD.
Takeoff.rotation.speed..A.pilot.selectable.speed. V ( R )
on.the.PFD.
Takeoff.safety.speed..A.pilot.selectable.speed.on. V ( _ )
the.PFD.
A general target speed for flight. A pilot selectable V ( T )
speed.on.the.PFD.
Volt-Amperes VA
Volts.Alternating.Current VAC
(.1.).Value.Added.Processor.. VAP
(.2.).Visual.Aids.Panel
(.1.).Virtual.Applications.Prototyping.System.. VAPS
(.2.).Virtual.Avionics.Prototyping.System
(.1.).Variation.. VAR
(.2.).Visual-Aural.Radio.Range.
(.3.).Volt-Amps.Reactive
Visual.Approach.Slope.Indicator VASI
Voltage.Averaging.Unit VAU
PFD.Flight.Director.Symbology.for.which.the. V BAR
command.bars.move.vertically.for.pitch.command.
and.rotate.for.roll.command.
Variable.Bypass.Valve VBV
(.1.).Design.Cruising.Speed.. VC
(.2.).Virtual.Circuit
Virtual.Circuit.Bridge VCB
(.1.).Variable.Capacitance.Diode.. VCD
(.2.).Voltage.Controlled.Device
___
Active.Maximum.Control.Speed VCMAX
Active.Minimum.Control.Speed VCMIN
Variable Controlled Oscillator VCO
VDL.Control.Unit VCU
(.1.).Design.Diving.Speed.. VD
(.2.).Heading.to.a.DME.Distance
Volts.Direct.Current VDC
VHF.Data.Link VDL
VHF.Data.Link.Mode.X VDL Mx
VHF.Digital.Radio VDR
Version VER
Video.Entertainment.System VES
The.rate.of.change.of.pressure.altitude,.usually. Vertical Speed
calibrated.in.hundreds.of.feet.per.minute.
Design.Flap.Speed VF
Flaps.Extended.Placard.Speed VFE
Variable Frequency Oscillator VFO
Visual Flight Rules Operations Panel VFOP
Visual.Flight.Rules VFR
Flap.Retraction.Speed VFXR (R)
Flap.Extension.Speed VFXR (X)
Vertical.Gyro/Directional.Gyro VG/DG
Ground.Velocity VG or VGND
Video.Graphics.Adapter VGA
Maximum Level-flight Speed with Continuous VH
Power
Very.High-speed.integrated.circuit.Hardware. VHDL
Description.Languages
Very High Frequency. The portion of the radio VHF
spectrum.from.30.to.300.MHz.
Very.High.Speed VHS
Very.High.Speed.Integrated.Circuits-Phase.2 VHSIC-_
___
Heading.to.a.course.intercept VI
VOR/ILS Receiver VIR
Lowest.Selectable.Airspeed VIs
Video.Intelligence.System VIS
Variable.Integral.Guide.Vane VIGV
Virtual.Integrated.Software.Testbed.for.Avionics VISTA
Video.Interface.Unit VIU
VOR/Localizer V/L
Landing.Gear.Extended.Placard.Airspeed VLE
Very Low Frequency VLF
Maximum Landing Gear of Operating Speed VLO
Lift-off.Speed VLOF
Very.Large.Scale.Integration VLSI
Valve VLV
Heading.to.a.manual.termination VM
Voltmeter V/M
Basic.Clean.Aircraft.Maximum.CAS VMAX
(.1.).Visual.Meteorological.Conditions. VMC
(.2.).Minimum.Control.Speed.with.Critical.Engine.
Out
(.1.).Versa.Module.Eurocard.Bus. VME
(.2.).VHF.Management.Entity,.VME.bus
Versa.Module.Eurocard.Card.Cage VMECC
Basic.Clean.Aircraft.Minimum.CAS VMIN
Minimum.Maneuver.Speed VM (LO)
Visual.Meteorological.Conditions VMC
The.maximum.airspeed.at.which.an.aircraft.is. Vmo
certified to operate. This can be a fixed number
or a function of configuration (gear, flaps, etc.), or
altitude,.or.both.
Velocity, Maximum Operating/Mach, Maximum VMO/MMO
Operation
VNMS.Health.Monitoring VMON
__3
Virtual Machine Operating System VMOS
Vertical.Navigation:.(Also.VNV)..A.system.by. V/NAV
which the crew can define a vertical path in space
and.the.system.can.output.guidance.to.maintain.
that.path.
Never-Exceed.Speed VNE
Maximum.Structural.Cruising.Speed VNO
VHF.Navigation.Receiver VNR
Vertical.Navigation VNV
Voice.Radio VOCRAD
Video On Demand VOD
Voice Over Internet Protocol VoIP
A.CALSE.L.function.that.would.automatically. Voispond
identify.an.aircraft.by.a.voice.recording..Voispond.
is.not.yet.implemented.
Volt-Ohm-Millimeter VOM
VHF Omnidirectional Radio Range. A system that VOR
provides.bearing.information.to.an.aircraft.
A system in which a VOR and DME station are VOR/DME
co-located.
VOR/Marker Beacon VOR/MB
A system in which a VOR and a TACAN station VORTAC
are.co-located.
Velocity Of Sound VOS
Voice.Transmission VOX
Vertical.Path VPATH
(.1.).Vendor.Part.Number.. VPN
(.2.).Virtual.Private.Networks
(.1.).Takeoff.Rotation.Velocity. VR
(.2.).Heading.to.a.radial
Video.Random.Access.Memory VRAM
Reference.Velocity VREF
VDL.Reference.Guide VRG
Video.Reproducer.Unit VRU
__4
Vertical.Speed V/S
Stall.Velocity Vs
Automatic.look-up.and.display.of.takeoff,. VSpeeds
approach,.landing.and.missed-approach.speeds.
Stall.Warn.Velocity Vsw
Very.Small.Aperture.Terminal VSAT
Variable Speed Constant Frequency VSCF
(.1.).Vertical.Stabilizer.Control.System.used.on. VSCS NOTAR helicopter .
(.2.).Voice.Switching.and.Control.System
( 1 ) VDL Specific DTE Address . VSD
(.2.).Vertical.Situation.Display
(.1.).Vertical.Speed.Indicator. VSI
( 2 ) Stalling Speed in a Specified Flight
Configuration
Vertical.Speed.Limit.Advisory.may.be.preventive. VSL Advisory
or.corrective.(TCAS)
Vertical.Separation.Minimum VSM
Stalling Speed in the Landing Configuration VSO
Vertical.or.Short.Takeoff.and.Landing VSTOL
Variable.Station.Vane VSV
Voltage-Standing.Wave.Ratio..The.ratio.of.the. VSWR
amplitude of the voltage (or electric field) at a
voltage.maximum.to.that.of.an.adjacent.voltage.
minimum..VSWR.is.a.measurement.of.the.
mismatch.between.the.load.and.the.transmission.
line.
Vertical.Track.Distance VTK
Volumetric Top-Off VTO
Vertical.Takeoff.and.Landing VTOL
Variable.Takeoff.Rating VTR
Vertical.Track V/TRK
Utility.Speed VU
Speed.for.Best.Angle.of.Climb VX
Speed.for.Best.Rate.of.Climb VY
___
(.1.).Watt.. W
(.2.).West
Wide.Area.Augmentation.System.(Method.of. WAAS
Differential.GPS)
Wide.Area.Differential WAD
Wide.Area.Differential.Global.Navigation.Satellite. WADGNSS
System
World.Area.Forecast.System WAFS
Wing.Anti-Ice WAI
Wide.Area.Network WAN
World.Administrative.Radio.Conference.(1992) WARC-9_
World.Administrative.Radio.Conference.for.the. WARC-MOB
Mobile.Service
Weight.and.Temperature WAT
West.Atlantic.Route.Structure WATRS
A position along a route of flight. Navigation Waypoint
aid,.airport,.or.geographic.point.a.pilot.uses.to.
navigate.the.aircraft.
Weight.and.Balance.Computer WBC
Work.Breakdown.Structure WBS
WXR.Control.Panels WCP
Wind.Direction WD
Warning.Electronic.System WES
Warning.Electronic.Unit WEU
WXR.Flat.Plate.Antenna WFA
World.Geodetic.System WGS
World.Geodetic.Survey.of.1972 WGS-__
World.Geodetic.System.1984 WGS-_4
A sequence of ATCRBS interrogations and Whisper Shout
suppressions.of.varying.power.levels.transmitted.
by TCAS equipment to reduce severity of
synchronous.interference.and.multipath.
problems.
__6
An.imaginary.line.joining.the.leading.and.trailing. WING CHORD
edges.of.the.wing.
Wind.Magnitude WINDMG
Wind.Direction WINDR
Work.In.Progress WIP
Wireless.Local.Area.Network WLAN
Welded.Pipe.and.Tube WLD
Wireless.LAN.Manager WLM
WXR.Antenna.Pedestal.and.WXR.Waveguide. WMA
Adapter
WXR.Indicator.Mount WMI
World Meteorological Organization WMO
With Modification of Vertical Profile W/MOD
Wide-area.Master.Station WMS
Weather.Message.Switching.Center WMSC
Weather.Message.Switching.Center.Replacement WMSCR
WXR.Mount WMT
Week.Number WN
Grouping.of.bits..Size.of.group.varies.from. WORD
microprocessor.to.microprocessor.
Weight On Wheels WOW
Working.Paper WP
Waypoint. A defined geographic point used as a WPT
reference.for.navigation.
Waypoint.Position.Report WPR
Weather.Radar.Attention.Unit WRAU
Wide-area.Reference.Station WRS
WXR.Receiver/Transmitter WRT
Weather.Support.for.Deicing.Decision.Making WSDDM
With.Step.Change.in.Altitude W/STEP
Weight WT
Weather WX
___
WXR.Indicator WXI
Weather.Radar.Panel WXP
Weather.Radar.System WXR
World.Wide.Web WWW
Waypoint.Altitude WYPT
ARINC XA
The frequency range between 8000 and . X-BAND
12500.MHz
International.Air.Transport.Association.(IATA) XB
A.DME.channel..There.are.126.X-channels.for. X-Channel
DME operation. For the first 63 channels, the
ground-to-air frequency is 63 MHz be low the
air-to-ground frequency. For the second 63-X
Channels the ground-to-air frequency is 63 MHz
above the air-to-ground frequency.
Transceiver XCVR
Transfer XFR
Exchange Identification XID
Cross-side XLS
Translator XLTR
External.Master XM
Transmit XMIT
eXtended.Markup.Language XML
Transmitter/Receiver XMTR/RCVR
ATC.Transponder.(also.XPDR,.X.PNDR,.TPR) XPD
Transponder XPDR
Cross Pointer: The flight director command bars. XPTR
Pitch.command.is.shown.with.vertical.motion.of.
the.horizontal.bar.and.roll.command.is.shown.
with.lateral.motion.on.the.vertical.bar.
SITA XS
Cross-side XSIDE
X/Open Transport Interface XTI
___
Crosstrack.(crosstrack.error) XTK
Express.Transfer.Protocol XTP
An.antenna.with.its.maximum.radiation.parallel. Yagi Antenna
to.the.long.axis.of.its.array,.consisting.of.a.driven.
dipole, a parasitic dipole reflector, and one
parasitic.dipole.director.or.more.
Refers.to.movement.about.the.vertical.axis.of.the. YAW
aircraft
Yaw.Stability.Augmentation.System YSAS
Yaw.Damper YD
( 1 ) Refer to reflectivity factor . Z
(.2.).Zulu.(GM.Time)
Zone Distribution Equipment ZDE
Zero.Fuel.Weight ZFW
A.marker.beacon,.sometimes.referred.to.as.a. Z-Marker
station locator, that provides positive identification
to.the.pilot.when.the.aircraft.is.passing.directly.
over a low-frequency navigation aid.
Zulu.Time Z
__9
For more information contact:
Rockwell Collins
400 Collins Road NE
Cedar Rapids, Iowa 52498
319.295.4085
Fax: 1.319.295.2297
E-mail: [email protected]
Web site: www.rockwellcollins.com
147-0427-000-CS 08/05 12M BUS © 2005, Rockwell Collins, Inc., All Rights Reserved, Printed in USA