GYRO compass.pdf

3-149 MK110ENG.P65Printed in GermanyStock No.056310

Head Office and Freight: Stueckenstrasse 1-3, D-22081 Hamburg, GermanyCorrespondence Address: P.O. Box 76 08 60, D-22058 Hamburg, Germany

Tel. ++ 49 - 40 - 299 00-0, Fax ++ 49 - 40 299 00-298, Telex 2 15 202 a plat d, E-mail: [email protected]

11 AUG 98 REV A

Operator, Technical, Installation and Service Manual

NAVIGAT X MK 1 Mod. 10SR 180-MK 1 Mod. 10

Digital Gyrocompass System

Copyright © C. PLATH, Hamburg 1998

This document contains proprietary information of C. PLATH in Hamburg,Germany.

Any use, reproduction or publication of this manual or any portions thereoffor purposes other than operation and maintenance by the recipient isexpressly prohibited without the prior written consent of C. PLATH. Subjectto alteration without notice.

* * *

Die in diesem Handbuch enthaltenen Angaben sind Eigentum der FirmaC. PLATH in Hamburg, Deutschland.

Der Gebrauch, die Vervielfältigung oder die Veröffentlichung dieses Hand-buches in der Gesamtausgabe oder in Auszügen zu anderen Zwecken alsder Bedienung und der Wartung durch den Empfänger, ist nur mit vorherigerschriftlicher Genehmigung der Firma C. PLATH gestattet. Technische Ände-rungen vorbehalten.

* * *

Les données contenues dans cette brochure sont propriété de l’entrepriseC. PLATH de Hambourg.

Toute utilisation, reproduction ou publication de cette brochure, soit en totalité,soit sous forme d’extraits, à toute autre fin que le service et l’entretien dumetériel par le destinataire, n’est autorisée qu’après accord écrit de la sociétéC. PLATH. Sous réserve de modifications techniques.

* * *

Los datos que contiene este manual se refieren a la propiedad de la firmaC. PLATH en Hamburgo.

El uso, la reproduccion o la publicacion de este manual en su total o enparte para otros motivos que no sean ni de servicio ni de mantenimiento esprohibido sin un permiso escrito especial de la firma C. PLATH.Modificaciones tecnicas son reservadas.

NAVIGATION AUTOMATION.

Contents-I

NAVIGAT X MK 1 Mod. 10 / SR-180 MK 1 Mod. 10 0563103-149 MK110ENG.P65

LIST OF CONTENTS

Chap./ PageSect.

1 DESCRIPTION1.1 Design and Main Features ..................................................................... 1-011.2 Technical Data ........................................................................................ 1-02

2 OPERATION2.1 Display and Control Elements ................................................................ 2-012.2 Operating Conditions ............................................................................. 2-012.3 Operation................................................................................................ 2-022.3.1 Power-up Sequence ...................................................................... 2-022.3.2 Heading Reference Source Selection ........................................... 2-022.3.3 Display Illumination ........................................................................ 2-022.3.4 Confirm Alarm / Mute Alarm Buzzer .............................................. 2-022.3.5 Menu Operation ............................................................................. 2-032.3.6 Menu Structure .............................................................................. 2-042.3.7 Display Data Selection................................................................... 2-052.3.8 Optional Functions ......................................................................... 2-062.3.9 North Speed Error Correction........................................................ 2-062.4 Manual Settings ..................................................................................... 2-072.4.1 Speed/Latitude Input for Automatic Error Correction .................... 2-072.4.2 Heading Difference Alarm Threshold ............................................ 2-072.4.3 Magnetic Variation ......................................................................... 2-082.4.4 North Speed Error Correction........................................................ 2-082.4.5 Voyage Data Printer (Set. NAVIPRINT) ......................................... 2-082.4.6 Rate Of Turn Damping Time Constant / Alarm Threshold ............. 2-092.4.7 Manual Settings – Overview .......................................................... 2-102.5 Setup Menu – User Setup ...................................................................... 2-112.5.1 Date / Time .................................................................................... 2-112.5.2 Software Version ............................................................................ 2-112.5.3 Magnetic Compass Calibration Table ............................................ 2-112.5.2 User Setup – Overview .................................................................. 2-12

3 ALARMS AND ERRORS3.1 Alarm System ......................................................................................... 3-013.1.1 Alarm Indication ............................................................................. 3-013.1.2 Alarm Relays ................................................................................. 3-023.1.3 Error List ........................................................................................ 3-023.2 Service Setup 2 ...................................................................................... 3-033.2.1 Access Code.................................................................................. 3-033.2.2 Gyrosphere Data ........................................................................... 3-03

Contents-II


3.2.3 Op. Time Counter ........................................................................... 3-033.2.4 Data List ......................................................................................... 3-033.2.5 Error List ........................................................................................ 3-033.2.6 Masterboard Reset (reset MK 1) ................................................... 3-033.2.7 Service Setup 2 – Overview .......................................................... 3-043.3 Locating Errors ....................................................................................... 3-053.3.1 Failure Indication (red LEDs) ......................................................... 3-053.3.1 Activity/Status Indication (green LEDs) ......................................... 3-06

4 INSTALLATION AND INITIALIZATION4.1 Installation of the Compass Housing ..................................................... 4-024.2 Electrical Connections ........................................................................... 4-024.2.1 The Connection Diagram............................................................... 4-024.2.2 Connecting the Ship's Cables ....................................................... 4-034.3 Installation of the Gyrosphere ................................................................ 4-034.4 Basic System Configuration ................................................................... 4-034.4.1 Alignment Error Correction ............................................................ 4-044.5 Magnetic Compass Calibration .............................................................. 4-054.5.1 Determinging Correction Values .................................................... 4-054.5.2 Storing the Calibration Table.......................................................... 4-064.6 Service Setup 1 ...................................................................................... 4-074.6.1 Access Code.................................................................................. 4-074.6.2 Interface Configuration (Interface I/O) ........................................... 4-074.6.3 Analogue Rate Of Turn Output ...................................................... 4-094.6.4 Rudder Angle Feedback Inputs ..................................................... 4-094.6.5 System Type .................................................................................. 4-104.6.6 Alignment Error Correction Value .................................................. 4-104.6.7 Shaft Encoder Correction Angle .................................................... 4-104.6.8 Ext. Status Input ............................................................................ 4-114.6.9 Name of Gyro ................................................................................ 4-114.6.10 Test Mode ...................................................................................... 4-114.6.11 Service Setup 1 – Overview .......................................................... 4-12

5 MAINTENANCE INFORMATION AND INSTRUCTIONS5.1 Maintenance Specifications ................................................................... 5-015.1.1 Annual Maintenance ...................................................................... 5-015.1.2 Five-Year Maintenance .................................................................. 5-015.2 Maintenance by Shipboard Personnel ................................................... 5-025.2.1 Removal of the Gyrosphere Container

at Low Ambient Temperatures ....................................................... 5-025.3 Maintenance by Service Personnel ....................................................... 5-045.3.1 Gyrosphere Handling and Storage Instructions ............................ 5-045.3.2 Safety Warning .............................................................................. 5-045.3.3 Installation of the Gyroshpere ....................................................... 5-055.3.4 Removal of the Gyrosphere ........................................................... 5-15

Contents-III


A TABLESA.1 Magnetic Compass Calibration Table .................................................... A-01A.2 Standard Manual Settings ..................................................................... A-02A.3 Basic Configuration Settings (Service-Setup 1) ................................... A-03A.4 North Speed error Tables ...................................................................... A-04

Contents-IV


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01


1 DESCRIPTION

1.1 Design and Main Features

NAVIGAT X Mk 1 / SR-180 Mk 1 is a microprocessor controlled gyrocompass systemwith integrated automatic north speed error correction.

The system is type approved by the German Federal Maritime and HydrographicAgency (BSH) and complies with IMO resolutions A.424 (IX) and A.574 (14) as wellas DNV-W1 and ISO standard 8728.For use in high speed craft, an optimized system is available, which complies withIMO resolution A.821 (19) - HSC.

C. PLATH's unique method of supporting the gyrosphere by means of mere buoy-ancy ensures north stabilization during short power failures. For example, after athree minute loss of power, no more than two degrees of deviation may be expected.Once power has been restored, the gyrocompass will return quickly to the correctheading without requiring the usual settling period. The combined effects of the twinrotors an the liquid damping system virtually eliminate latitude error.

Heading is measured as a 12 bit absolute value by means of a digital shaft encoder.The high-speed follow-up system (> 100°/sec.) ensures extremely accurate meas-urements of heading and rate of turn under all operating conditions.

The system features an integrated TMC-function (magnetic compass transmission)and input interfaces for a second gyrocompass, speed log, position receiver and tworudder angle feedback units.

The gyrocompass provides 12 independent serial data outputs to analogue or digitalrepeaters (including short-circuit-proof 24 VDC repeater power supply), RS 422 andNMEA sensor data outputs, a special NMEA Fast output interface (reduced dataset)and a NMEA Superfast output interface (adjustable baudrate, max 38400 baud). Fur-thermore, two 6 step/° heading outputs, an analogue rate of turn output and an inter-face for the voyage data printer NAVIPRINT are provided.

Integrated monitoring and alarm functions for the supply powers, gyroscope temperaturand current and the follow-up system ensure secure and trouble-free operation of thesystem.

The single unit design with a polyurethane hard foam housing of low weight allowsthe gyrocompass system to be installed on any bridge, from large yachts to the mostcapacious merchant vessels. If required, the integrated control and display unit maybe installed at a remote location from the gyrocompass or an additional remote oper-ating unit installed.

As an option, a special "compass monitor" control unit is available, which providesadditional independent monitoring functions and features a numerical keypad, whichfacilitates the operation of the system.

An optional switch-over unit for twin gyrocompass systems provides for completeredundancy of all in- and output signals and thus ensures the independence of theindividual compasses.

02


1.2 Technical Data

heading display ............................................... 4-digitfollow-up speed ............................................... > 100°/smean settling time........................................... < 3 hfreedom of roll and pitch ................................. ±40°

Accuracy

standard systemlinear mean settle point error ................. ≤ 0.1° sec latstatic error .............................................. ≤ 0.1° sec latdynamic error ......................................... ≤ 0.4° sec latmax. deviation after power interruptionof 3 min. .................................................. < 2°

HSC-system (high speed craft) ...................... accuracies comply to IMO resolutionA.821(19) - HSC

Ambient Temperature Range

operation ......................................................... -10 – +55 °Cstorage ............................................................ -25 – +70 °C (w/o supporting fluid)

Power Supply

supply voltage ................................................. 115/230 V~ ±10%;including automatic switchover to24 V emergency power supply inaccordance with GMDSS rules forINMARSAT/SES terminals

or .................................................. 24 VDC (18 - 36 V)

Protection Grade ........................................... IP 23 in accordance with DIN 40050

Environmental Requirements and EMC ..... in accordance with IEC 945

Power Consumption DC AC

start-up ............................................................ 80 W 125 VAoperation ......................................................... 45 W 75 VAeach analogue repeater ................................... 7 W 7 VAeach digital repeater ........................................ 7 W 7 VA

03


Data Outputs

repeater outputs .......................................12 gyrocompass heading, magneticcompass heading, rate of turn, head-ing reference status; supply power24 VDC, max. 7 W each

data outputs NMEA....................................2 gyrocompass heading, magneticcompass heading, rate of turn, posi-tion, speed, heading reference status

data outputs RS 422 ..................................3 gyrocompass heading, magneticcompass heading, rate of turn, posi-tion, speed, heading reference status

data output RS 422 FAST ..........................1 gyrocompass heading, magneticcompass heading, rate of turn

data output RS 422 SUPERFAST .............1 gyrocompass heading, magneticcompass heading, rate of turn, head-ing reference status

6 step/°-outputs ..........................................2 act. heading; 24 VDC, max. 18 W(12 –70 VDC with ext. power supply)

analogue rate of turn output ......................1 ±0.1-999.9 mV/°/min, settable;max. 10V, 10 mA

voyage data printer output .........................1 act. heading, rudder angles, date,time, heading reference, steeringmode, speed, position

Alarm and Status Outputs

power failure / general device error alarm ...... potential-free contact;max. 30W, 1A; 125 V

AC power supply ............................................. potential-free contact;max. 30W, 1A; 125 V

AC power supply ............................................. potential-free contact;max. 30W, 1A; 125 V

heading reference status (G1/G2/Mag) .......... potential-free contact;max. 30W, 1A; 125 V

heading difference alarm ................................ potential-free contact;max. 30W, 1A; 125 V

max ROT alarm............................................... potential-free contact;max. 30W, 1A; 125 V

watch alarm trigger output .............................. potential-free contact;max. 30W, 1A; 125 V

04


Data and Signal Inputs

magnetic heading ........................................... fluxgate sensor, sin/cos type orelectronic compass, NMEA 0183 orPLATH-format

heading gyro 2 ................................................ NMEA 0183, PLATH-format,Lehmkuhl LR 20 or LR 40

position............................................................ NMEA 0183speed .............................................................. NMEA 0183 or 200 pulses/nmrudder angle .................................................... 2 independent rudder angles, ana-

logue (feedback. potentiometer)steering mode ................................................. sel. switch statusheading reference ext. (Gyro/Mag;G1/G2) ..... sel. switch statustime const. ROT .............................................. sel. switch statusext. alarm acknowledge .................................. sel. switch status

Dimensions and Weight

width ................................................... 404 mmheight ................................................. 520 mmdepth .................................................. 420 mmfront plate control unit ................... 96 x96 mm

weight ..................................................... 25 kg

520

404420

01


2.2 Operating conditions

Caution:After a cold start, the gyrocompass system requires a settling time of up to threehours before reliable heading data is produced. The gyrocompass system is to be inoperation for at least three hours before leaving harbour. It is recommended that thegyrocompass system be switched off during long docking periods only.

Caution:The permitted ambient temperature range for the operation of the gyrocompass sys-tem is -10 – +55 °C.

At ambient temperatures below 0 C° when the gyrocompass is not in operation, andbelow -10 C° when the gyrocompass is in operation, the gyrosphere container is tobe removed from the compass housing and stored at a place where the ambienttemperature will not fall below 0 °C.

If no storage place is available where the ambient temperature will not fall below 0 °C,the gyrosphere is to be removed from the gyrosphere container to prevent damagecaused by frozen supporting fluid.

The gyrosphere may be removed by personnel of an authorized C. PLATH servicestation only.

2 OPERATION

2.1 Display and Control Elements

GYROCOMPASS

RESET

DIM –

F2

ENTER

DIM +

F3F1

MENU

SHIFT

LCD screen4 x 20 characters, alphanumerical

control keysdirect functions: Menu, , , Dim-, Dim+

via shift-key: F1, F2, F3, Reset, Enter

NAVIGAT X Mk 1 / SR-180 Mk 1control and display unit

02


2.3 Operation

2.3.1 Power-up Sequence

Energize the gyrocompass system.

!"#$

! %

1 2 3

1) The control and display unit performs self-test and takes up operation.2) The control and display unit displays the masterboard status message.3) The gyrocompass system enters normal operational mode. The startup screen

is displayed, showing heading data from the connected compasses and theheading difference alarm threshold.

2.3.2 Heading Reference Source Selection

From the startup screen, the operator may select one of the available heading sourcesas the reference for the devices connected to the gyrocompass system (e.g. autopi-lot, repeaters etc.).

Internal Selection (standard)

Press keys simultaneously to select gyro 1.

Press keys simultaneously to select gyro 2 (if available).

Press keys simultaneously to select magnetic compass (if available).

External Selection (optional)Use the external selector switch to select the heading reference.

Note: Heading reference selection is permitted in manual steering mode only. Ifsteering in autopilot mode, source selection is disabled.

2.3.3 Display Illumination

Press key. The display becomes brighter.

Press key. The display becomes darker.

2.3.4 Confirm Alarm / Mute Alarm Buzzer

On alarm, press keys to confirm the alarm and clear the alarm messagefrom the display screen. The alarm buzzer is muted simultaneously. If thecause of an alarm is eliminated, a pending alarm message is automaticallycleared from the display and the buzzer muted.

On alarm, press keys to mute the alarm buzzer.

03


2.3.5 Menu Operation

The data display screens and the manual settings, user and service setup modes areaccessible via a multilevel operating menu.

entering / quitting the main menu

/ from startup screen, press to go tomain menu screen.

from main menu screen, press to re-turn to startup screen.

navigating the menu

go to sub-menu

return to next higher menu level

/ go to next/previous screen on samemenu level

selecting parameter settings

flashing arrows: selection expected

/ show next/previous option

select option and go to next line

entering data

flashing cursor: data input expected

/ increase/decrease input value

/ move cursor forward/back

confirm input and go to next line

clear input (value is set to zero)

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MENU

/

(

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F2

F1

F3

higher menu level lower menu level

'

MENU

/

04


2.3.6 Menu Structure

DISPLAY DATA

GYROCOMPASS

MAG. COMPASS

POSITION

SPEED

DATE/TIME

SERVICE SETUP 2

GYROSPHERE DATA

OP. TIME COUNTER

DATA LIST

ERROR LIST

RESET MK 1

MANUAL SETTINGS

SPEED/LATITUDE

HDG DIFF. ALARM

MAGNETIC VARIATION

NORTH SP.ERR.CORR

SET.NAVIPRINT

SETTINGS ROT

TEST MODE

NAME OF GYRO

INTERFACE I/O

ANALOG. ROT OUTP.

FEEDBACK SIGNAL

SYSTEM TYPE

ALIGN ERR. CORR.

EXT. STATUS IN

NMEA SUPERFAST

TxD NMEA FAST

GYRO INPUT

MAG HDG INP.

SPEED INPUT

POS INPUT

SENS.D.M.OUTP

SERVICE SETUP 1

SHAFT COR. ANGLE

MAG. C. CAL. TABLE

USER SETUP

DATE/TIME

SOFTWARE VERSION

SETUP MENU

SERVICE SETUP

05


2.3.7 Display Data Selection

The "Display Data" menu provides access to the data display screens. The selecteddisplay screen remains active until the user selects a different screen or quits thedisplay data menu.

Display data screens

Gyrocompass data- gyrocompass heading- rate of turn- correction status (on / off)

Magnetic compass data (M-System types only)- magnetic compass heading- magnetic variation

!!!"

#!

Position data- position data source (auto /man)- latitude- longitude

$%

Speed- speed data source (auto / man)- actual speed

&

!

Date / Time- current date- current time

06


2.3.8 Optional Functions (available if relevant equipment installed)

Ext. Alarm Acknowledge

Mutes the alarm buzzer from a remote facility (e.g. a central alarm panel). The alarmmessage remains on the display screen until the alarm is confirmed.

Turn Heading Display 180°

Turns the heading display by 180° (e.g. for operation in ferries). Actuated by externalselector switch.

Analogue Rate of Turn Display Damping

Turns damping of the analogue rate of turn output on/off. Actuated by external selec-tor switch.

Watch Alarm Trigger Output

Activates the watch alarm trigger relais for 100 msec. Actuated by pressing any keyon the control and display unit.

2.3.9 North Speed Error Correction

The NAVIGAT X Mk 1 gyrocompass system provides automatic correction of thenorth speed error. If correction is active, the system permanently calculates the northspeed error from the current speed and position and corrects the gyrocompass head-ing data accordingly.

The north speed error δ arises from the combination of the ship's speed with therotation of the earth. Depending upon the latitude and the vessel's speed and direc-tion, the heading indicated by an uncorrected gyrocompass deviates from the trueheading by the north speed error δ.

The mathematical formula for the north speed error δ is:

sin = –δ904 · cos ϕv · cos hdg.( )

where: v = speed (kts.)ϕ = latitude904 = rotational speed of the earth (kts.)

As a reference, a set of error tables is provided at the back of this manual which givethe north speed error δ of an uncorrected gyrocompass at different headings, speedsand latitudes.

07


2.4 Manual Settings

2.4.1 Speed/Latitude Input for Automatic Error Correction

input mode (speed/lat mode)

Settings: speed mode man = manual speed inputauto = automatic speed input

lat mode man = manual position inputauto = automatic position input

Function: Selects between automatic/manual input of the actual speed and lati-tude respectively. In order for automatic north speed error correction towork, valid speed and latitude data must be available to the system. Ifpossible, automatic data input should be used.

Note: If manual input mode is selected, no speed/position data is sent to thedata outputs.

manual input speed/latitude

Settings: speed: 0 – 99.9 kts.latitude: 90:00.00 N – 90:00.00 S

Function: Enters speed/position data manually.

Note: If speed and/or position are entered manually, the relevant data mustbe continuously updated according to the prevailing conditions. Manualspeed input should be accurate to at least 1 kt., manual latitude inputshould be accurate to at least 1°.

2.4.2 Heading Difference Alarm Threshold

Settings: GY1/GY2 = monitors gyro 1 / gyro 2GY1/Mag = monitors gyro 1 / magnetic compassGY2/Mag = monitors gyro 2 / magnetic compass

OFF = no monitoring

alarm threshold: 0 – 99°

Function: Selects the heading sources to be monitored and sets the headingdifference alarm threshold. If the difference between the heading datafrom the monitored compasses exceeds the set threshold, the headingdifference alarm relay is actuated. Simultaneously, an error message isdisplayed and an audible alarm given.

Note: The heading difference alarm function is not available if the systemtype is G.

08


2.4.3 Magnetic Variation

Settings: 99.9° W – 99.9° E

Function: Sets the magnetic variation for the vessel's area of operation. The mag-netic compass heading data is automatically corrected according tothe set variation. The applicable value for the magnetic variation is tobe taken from the sea chart relevant to the area in question.

Note: Check for the sea chart's date of issue and apply annual changes ofthe magnetic variation, if necessary. The setting of the magnetic varia-tion is not available if the compass system type is G or GG.

2.4.4 North Speed Error Correction

Settings: ON = automatic correction activeOFF = no automatic correction

Function: Turns the automatic north speed error correction on or off. If automaticnorth speed error correction is active, the system permanently calcu-lates the north speed error from the current speed and position andcorrects the gyrocompass heading data accordingly.Automatic north speed error correction should be active at any time.If possible, automatic speed and position input should be used.

Note: If manual speed and/or position input is selected, the relevant datamust be continuously updated according to the prevailing conditions.Manual speed input should be accurate to at least 1 kt., manual lati-tude input should be accurate to at least 1°.

2.4.5 Voyage Data Printer (Set. NAVIPRINT)

Settings: ON = output to printer activeOFF = no output to printer

paper feed speed: 60 mm/h / 150 mm/h / 600 mm/hheading scale: ±30° / ±180°

rudder scale: ±9° / ±45° / ±70° / OFF

Function: Sets the parameters for the printout to a C. PLATH voyage data printerNAVIPRINT. "ON" turns on printing, using the set parameters for paperspeed, heading and rudder scales. "OFF" turns off printing.

Note: The voyage data printer may be connected to different C. PLATH equip-ment (autopilots, compass systems, compass monitor, digital repeater).The printing parameters can only be set from the device the printer isdirectly connected to.After any interruption of power, the compass system's internal clockmust be reset in the user setup, in order for time and date to appearcorrectly on the printout.

09


2.4.6 Rate Of Turn Damping Time Constant / Alarm Threshold (Settings ROT)

damping time constant

Settings: 0 - 99 s

Function: Sets the damping time constant for the analogue rate-of-turn output.The larger the constant, the stronger sudden peaks of the output volt-age are damped. Damping is turned on/off by an external selector switch.

Note: Damping is effective for the analogue rate of turn output only. The dig-ital display and the serial outputs always put out undamped rate of turndata.

alarm threshold

Settings: 0 – 6000°/min

Function: Sets the threshold value for the maximum rate of turn alarm. If theactual rate of turn exceeds the set value, the rate of turn alarm relay isactuated. Simultaneously, an alarm message is displayed and an audi-ble alarm given.

10


2.4.7 Manual Settings – Overview

NORTH SP.ERR.CORRONOFF

MAGNETIC VARIATION99.9° W – 99.9° E

SPEED/LATITUDE

SPEED/LAT MODE

SPEED/LAT SET

SPEED MODE

POSIT MODE

90:00.00 N – 90:00.00 S0 – 99.9 kts.

AUTOMAN

AUTOMAN

HDG DIFF. ALARMGY1/GY2GY1/MAGGY2/MAGOFF0 – 99°

SET. NAVIPRINT

PAP. SPD.60 mm150 mm600 mm

HDG30°180°

RUD9°45°70°OFF

ONOFF

NAVIPRINT

SETTINGS ROT

TIME CONST. ROT

MAX. VALUE ROT

0 – 99 sec.

0 – 9999°/min

'

settings for voyage data printer

north speed error correction

time const. / alarm thresholdrate of turn

heading difference alarmthreshold

data input for automaticerror correction

magnetic variation

11


2.5 Setup Menu – User Setup

The "User Setup" menu provides acces to the internal clock, software version dataand the magnetic compass calibration table.

2.5.1 Date/Time

Settings: Day/Month/YearHours/Minutes

Function: Sets the internal clock. Date and time information is accessible via thedisplay data menu. If a voyage data printer NAVIPRINT is connected tothe compass system, the internal clock provides the time reference forthe printer.

Note: The internal clock is not backed up by a battery. After any interruptionof power, date and time must be reset by the operator.

2.5.2 Software Version

Function: Displays the version numbers of the control unit's and the masterboard'ssoftware respectively.

2.5.3 Magnetic Compass Calibration Table

Settings: ON = calibration activeOFF = no calibration

heading display values: 0.0 – 359.9°correction values: -99.9° – +99.9°

Function: Selects between the calibrated/uncalibrated display of the magneticcompass heading and provides access to the magnetic compass cali-bration table.

For a description of the magnetic compass calibration procedure, seesection 4.5.

12


2.5.4 User Setup – Overview

MAG.C. CAL.TABLE

entry #: 0 – 49

ON

DATE/TIME

DATE

TIME

DD.MM.YY (day/month/year)

HH:MM (hr./min.)

SOFTWARE VERSIONmaster board:display board:

NN.NNN.N

) !

*

display software version

input date/time

magnetic compasscalibration table

hdg. display: 0.0 – 359.9°corr. value: -99.9 – +99.9°

OFFENTER VALUES

01


3 ALARMS AND ERRORS

3.1 Alarm System

The system continuously monitors the function of the gyrocompass and the integrityof all input data.

3.1.1 Alarm Indication

When the system detects an error, the alarm buzzer is actuated. An alarm messageappears on the display, indicating the cause of the alarm. The user is prompted toconfirm the alarm state.

Press keys to confirm the alarm and clear the alarm message from the dis-play screen. The alarm buzzer is muted simultaneously.

Press keys to mute the alarm buzzer. The alarm message remains on thedisplay screen until the alarm is confirmed.As soon as the cause of the alarm is eliminated, the corresponding alarmmessage is automatically cleared from the display and the buzzer mutedsimultaneously.

Note: Confirmation of an alarm does not clear the corresponding entry from theinternal error list (see 3.1.3).

FAILURE GYRO CURRENT gyrosphere current <150 mA or >550 mA

local compass: follow-up system failuresecond compass: no valid data from second gyrocompass

receiving no valid data from magnetic compass

receiving no valid data from position receiver

receiving no valid data from speed log

heading difference exceeds alarm threshold

rate of turn exceeds alarm threshold

GYRO FAILURE

MAGN. COMPASS ERROR

POSITION ERROR

SPEED ERROR

HDG. DIFF. ALARM

MAX. ROT EXCEEDED

alarm message displayed cause

02


3.1.2 Alarm Relays

The gyrocompass system provides three alarm relays to signal a detected alarmstate to external devices. When the system is energized and no alarm state is de-tected, the alarm relays are attracted , i.e. the relay contacts closed.

If failure occurs in the compass which is currently selected as the heading reference,an alarm is given and relay K6 (power failure and general alarm) released.

If the currently set heading difference threshold is exceeded, an alarm is given andrelay K7 (hdg. diff. alarm) released.

If the currently set max. rate of turn threshold is exceeded, an alarm is given and relayK4 (max. ROT alarm) released.

A released alarm relay will attract again automatically when the cause of the alarm iseliminated.

3.1.3 Error List

The gyrocompass system maintains a list of currently detected errors which is acces-sible via the service setup 2 menu.

!

* $ +

If more than one error is detected, the error causes are indicated alternately in thethird display line. The number of detected errors is displayed in the fourth display line.

Confirmation of an alarm state does not clear the corresponding entry from the errorlist. Entries are cleared automatically from the list when the cause of a given error iseliminated.

03


3.2 Service Setup 2

The "Service Setup 2" menu provides access to operational data that may be ofimportance when service or maintenance work is carried out. Additionally, the opera-tor may initiate a masterboard reset.

3.2.1 Access Code

In order to prevent inadvertent or unauthorized changes of the configuration settings,the service setup modes are protected by acces codes.

To access the Service-Setup 2, enter 610.

3.2.2 Gyrosphere Data

Function: Displays the gyrosphere temperature, phase bridge voltage andgyrosphere current.

Note: Directly after power-up, the gyrosphere current should not exceed550 mA. The current will gradually fall while the gyrosphere settles.Within 45 minutes after power-up, the gyrosphere current must havedropped below 300 mA. Failing this, the gyrosphere is defective andmust be replaced.

3.2.3 Op. Time counter

Function: Displays the operation time counter.

3.2.4 Data List

Function: Displays a list of operational data.

3.2.5 Error List

Function: Displays a list of currently detected errors. When the cause of a givenerror is eliminated, the corresponding entry is automatically clearedfrom the error list.

Note: Confirming an alarm state or muting the alarm buzzer does not clearthe corresponding entry from the error list.

3.2.6 Masterboard Reset (reset Mk 1)

Function: Initiates a reset (warm start) of the masterboard.

04


3.2.7 Service Setup 2 – Overview

ERROR LISTdisplay active errors

DATA LISTdisplay data

GYROSPHERE DATA

RESET Mk 1

! '

(

! '

'

masterboard reset(warm start)

error list

operation time counter

gyrosphere data

data list

display data

OP. TIME COUNTERdisplay counter

initiate reset

05


3.3 Locating Errors

To facilitate servicing, the masterboard is equipped with LEDs indicating the activityand status of all in- and outputs, the presence of both external and internally gener-ated supply voltages and short circuit or overload of the voltage outputs.

3.3.1 Failure Indication (red LEDs)

CR 58CR 131

CR 84CR 82CR 83

CR 130

CR 81

CR 129

CR 80

CR 128

CR 79 CR 78CR 77 CR 76CR 75 CR 74CR 73 CR 72CR 71 CR 70

CR 132

CR 85

CR 60

NAVIGAT X Mk 1 masterboard: location of red LEDs

overload / short circuit indication

24 VDC power supply warning

79

80

81

70

71

72

73

74

75

76

77

78

serial repeater 1

serial repeater 2

serial repeater 3

serial repeater 4

serial repeater 5

serial repeater 6

serial repeater 7

serial repeater 8

serial repeater 9

serial repeater 10

serial repeater 11

serial repeater 12

58 24 VDC out (TB 1.3/4)

82

83

84

85

128

129

130

131

132

60

+12 VDC fluxgate (TB 3.16)

+24 VDC cooling fan (J10)

+24 VDC 6 step/° outputs (Tb 7.19/26)

24 VDC supply present - wrong polarity

+24 VDC switchboard (TB 3.22)

+24 VDC switchboard (TB 3.23)

+12 VDC control unit (J3)

+12 VDC ext. control unit (Tb 4.9)

+24 VDC compass monitor (Tb 4.3)

-12 VDC out (Tb 4.24)

06


3.3.2 Activity/Status Indication (green LEDs)

NAVIGAT X Mk 1 masterboard: location of green LEDs

CR 61

CR 35 CR 45CR 36 CR 46CR 37 CR 49CR 38 CR 50

CR 29 CR 30CR 31 CR 150

CR 1CR 2CR 3CR 4CR 5CR 6

CR 152CR 67

CR 402CR 403 CR 401CR 404 CR 407CR 405 CR 408CR 406 CR 409

CR 93CR 94CR 95CR 99CR 98CR 97

CR 20CR 86CR 19CR 18CR 17

CR 24CR 23

CR 21CR 22

CR 69CR 66

CR 53

relay status indication

401 relay K1 (watch alarm acknowledge) attracted = acknowledge status active

relay K2 (status G1/G2) attracted = gyro 2 active

relay K3 (status gyro/magn.) attracted = magn. active

relay K4 (max. ROT alarm) attracted = no alarm state

relay K5 (status AC) attracted = AC power present

relay K6 (power failure + general alarm) attracted = no alarm state

relay K7 (hdg. diff. alarm) attracted = no alarm state

relay K8 (status DC) attracted = DC power present

relay K9 (status G1/G2 to switchboard) attracted = gyro 2 active

401

402

403

404

405

406

407

408

409

07


35

36

37

38

29

31

93

94

95

97

98

99

150

status indication

6 step/° output activity

1

2

3

4

5

6

30

receiving data from:

speed log (NMEA)

position receiver

magnetic compass (NMEA)

unused

compass monitor

remote control + display unit

speed log (200 pulse/nm)

G1/G2 – gyro 2 selected

gyro/magn. – magn. selected

master/remote – remote selected

ROT damping time const. active

auto/man – man selected

ext. status in – status signal present

output 1 – phase 3 active






ext. alarm ackn. signal present

53

61

66

67

69

152

45

46

49

50

power indication

FU-step-motor activity

115/230 VAC supply present

24 VDC supply present / polarity ok.

+12 VDC present

-12 VDC present

+5 VDC present

+24 VDC FU-motor present

FU-motor phase active TB 8.6




17

18

19

20

21

22

23

24

86

sending data to:

NMEA Superfast interface

voyage data printer

remote control + display unit

compass monitor

sensor data interface (TB 7.1/2)

sensor data interface (TB 7.3/4)

unused

NMEA Fast interface

serial repeaters 1–12

08



01


4 INSTALLATION AND INITIALIZATION

The NAVIGAT X Mk 1 gyrocompass system comprises a compass housing completewith installed baseplate assembly, masterboard and control and display unit, agyrosphere container, a gyrosphere and an installation and replacement parts kit.

The gyrosphere is contained in a shockproof box, which is packed in a transportcontainer. This transport container is completely suitable for transport by air, sea, railand road.

Caution:The gyrosphere is always to be transported in an original transport container.Do not throw or drop the transport container.The transport container is to be transported in an upright position only.

The gyrosphere may be installed by personnel of an authorized C. PLATH servicestation only.

Until installation, the shockproof box containing the gyrosphere is to be stored in itsoriginal transport container. Upon installation, the gyrosphere is to be removed fromthe transport container in its shockproof box and is to be carried by hand directly tothe place of installation.

Caution:The shockproof box containing the gyrosphere is only to be transported by hand, andis to be handled with extreme care.

02


4.1 Installation of the Compass Housing

The compass housing is to be attached to a level surface, e.g. a floor or console bymeans of six M10 bolts or welding studs (to be supplied by the shipyard). At the placeof location of the compass, proper ventilation must be ensured and sufficient spaceprovided for the housing to be opened and maintenance work to be carried out. Theamount of space required, the attachment points and the position of the cable inletsare shown in the dimension drawing at the back of this manual.

In the horizontal plane, the compass may be installed at any angle with respect to thevessel's longitudinal axis. Alignment error (i.e. the angle between the compass' andthe vessel's longitudinal axis) is corrected electronically by setting the alignment er-ror correction value in the service setup 1 (see 4.4.2).

4.2 Electrical Connections

4.2.1 The Connection Diagram

Each gyrocompass system is supplied with an installation-specific connection dia-gram. The connection diagram provides the information needed to fit and connect allcables required by the gyrocompass system.

All cables supplied by the manufacturer carry identification labels, as do all plug con-nectors. These identifications may also be found in the connection diagram.

4.2.2 Connecting the Ship's Cables

Except for the AC power supply cables, all ship's cables are directly connected toterminals on the masterboard.

Insert the ship's cables through the inlets at the sides of the compass housing. Re-move the outer cable covers, draw back the cable shields and fasten the cables withclamps or cable bands to the threaded studs as shown in the dimension drawing atthe back of this manual.

To connect the individual wires, remove the terminal stripsfrom their sockets. After wiring, fasten the strips to the sock-ets with their securing screws.

All wires running inside the housing should be kept as shortas possible. Avoid to lead wires from one side of the housingto the other. The data and signal inputs as well as the statusoutputs and connections to the operating units and the switch-

board are located on the left hand side of the masterboard (TB2 – TB4). The serialdata outputs, the analogue rate of turn output and the repeater power supply connec-tions are located on the right hand side of the masterboard (TB5 – TB7).

03


4.3 Installation of the Gyrosphere

Install the gyrosphere as described under 5.3.3.

Note: The gyrosphere may be installed by personnel of an authorized C. PLATHservice station only.

4.4 Basic System Configuration

When the ship's cables have been connected and the gyrosphere installed, the basicsystem configuration is to be carried out by setting the configuration parameters tothe required values in the service setup 1 (see 4.6).

To configure the system:

1) Go to the service setup 1 menu.

2) Select the required system type and heading reference selection mode (see4.6.5). In twin gyrocompass systems, assign a compass ID (see 4.6.9).

3) Select the required data formats for all devices connected to the data inputs(see 4.6.2). Disable unused heading inputs (gyro and/or magnetic hdg. in-puts in system types G, GM, or GG).

4) Select the required data output formats (see 4.6.2).

5) If required, set the parameters for the analogue rate of turn output and therudder angle feedback and ext. status inputs.

Note: Do not change the preset shaft correction angle in the service setup 1. Thealignment error correction may be set to an approximate value at this point.The existing alignment error, however, must be exactly determined and cor-rected as described in the following section.

To round off the configuration:

1) Select the required speed/latitude modes, north speed error correction, voy-age data printer and rate of turn output settings in the manual settings menu.

2) Enter the current date and time in the user setup menu.

Note: In twin gyrocompass systems, the individual compasses must be configuredseparately with identical parameters except for the compass ID.

After configuration, function-check the complete system with all connected equip-ment in operation. Use the test mode in the service setup 1 to check the headingoutput to serial and 6 step/° repeaters and the analogue rate of turn output.

In order to bring the gyrocompass system into a working state, the existing alignmenterror must now be determined and corrected as described in the following section.

If required, correction values for the magnetic compass heading display may be de-termined and entered into the system's calibration table as described under 4.5.

04


4.4.1 Alignment Error Correction

In order to obtain correct heading data, the existing alignment error (i.e. the anglebetween the compass' and the vessel's longitudinal axes) must be determined andthe required correction applied. Alignment error is 0° if the sides of the compasshousing run exactly parallel to the vessel's longitudinal axis and the back of the hous-ing points dead ahead. Alignment error correction is carried out electronically by set-ting the required correction value in the service setup 1.

Caution:Before alignment error correction is carried out, the gyrocompass system is to be incontinuous operation for at least 4 hours.

1) Determine the existing alignment error.

Note: If bearing repeaters are used to determine the aligment error, these must beproperly aligned to the vessel's longitudinal axis.

!

,++++correction value = -(alignment error)

alignment error

compass orientation

vessel's longitudinal axis

2) In the service setup 1, select the align error correction sub-menu.

3) Enter the required correction value. The correction value equals the align-ment error with the sign reversed.

Note: After correction of the alignment error, the compass is to display the vessel'strue heading to an accuracy of at least 0.5°.

05


4.5 Magnetic Compass Calibration

Because the function of fluxgate sensors and electronic compasses is not exactlylinear, minor deviations may occur between the actual magnetic compass headingand the heading data transmitted by these devices. The gyrocompass system willautomatically correct these deviations if a calibration table has been stored in thesystem's memory and calibration is activated in the user setup.

4.5.1 Determining Correction Values

1) Check that magnetic compass calibration is set to "OFF" in the user setupmenu.

2) Check that the magnetic variation is set correctly in the manual settingsmenu.

3) Select manual steering mode. Compare at regular intervals the differencebetween the actual magnetic compass heading and the magnetic headingdisplayed on the gyrocompass' display. It is recommended to cover the fullcircle in steps of 10° (0°, 10°, ... , 350°).

4) Enter the observed display values in the magnetic compass calibration tableat the back of this manual.

5) Calculate the required correction value for each heading. The correction valueis the offset which must be applied to a given display value in order to obtainthe actual magnetic heading.

e.g.: The actual magnetic heading is 0°. The magnetic heading displayed onthe gyrocompass' display is 0,8°. The required correction value is -0,8°.

- +.

++

++

magneticcompassheading

hdg. displayNAVIGAT X Mk 1

(uncalibrated)

correctionvalue

0°

10°

20°

0,8°

0,9°

N

S

W E

determine correction values

-0,8°

Note: The magnetic compass used as reference during the calibration proceduremust be properly installed and adjusted.Use of the gyrocompass as a calibration reference (gyrocompass emula-tion) is not permitted!

06


4.5.2 Storing the Calibration Table

1) In the user setup, select the magnetic compass calibration sub-menu.

*

!

0° 0,8° -0,8°

10° 0,9° -0,9°

20° 1,0° -1,0°

correctionvalue

magneticcompassheading

hdg. displayNAVIGAT X Mk 1

(uncalibrated)

* ++

++++

! /++.

enter heading/correction

value pairs

2) Press keys to go to the calibration table entry screen.

3) Enter heading/correction value pairs:

/ increase / decrease value at cursor position

/ move cursor forward / back

confirm set value; when both heading and correction values havebeen confirmed, the entry is stored in the calibration table

go to next table entry

go to previous table entry

+ clear entry from calibration table

Note: The calibration table is stored in the system's permanent memory. If thecomplete set of table entries is to be altered (e.g. when a new magneticheading sensor has been fitted), clear the old entries from the table first.

07


4.6 Service Setup 1

The "Service Setup 1" menu provides access to the basic configuration settings.

4.6.1 Access Code

In order to prevent inadvertent or unauthorized changes of the configuration settings,the service setup modes are protected by acces codes.

To access the service setup 1, enter 600.

4.6.2 Interface Configuration (Interface I/O)

NMEA Superfast Interface Baudrate (NMEA Superfast)

Settings: 4800 baud = all available data; 4800 baud9600 baud = all available data; 9600 baud

19200 baud = all available data; 19200 baud38400 baud = all available data; 38400 baud

NMEA-HCHDT = true hdg. derived from mag. hdg. only; 4800 baud

Function: Selects the output baudrate of the NMEA Superfast interface.For special purposes, the NMEA-HCHDT mode is provided, in whichthe interface sends true heading data derived from the magnetic head-ing sensor input by applying magnetic variation and deviation (mag.hdg. calibration).

Note: The NMEA standard transmission baudrate is 4800 baud. Higherbaudrates can only be used if supported by the receiving equipment.

NMEA Fast Interface Data Format (TxD NMEA Fast)

Settings: NMEA = NMEA sentences; 4800 baudPLATH = Plath-format

NMEA-HCHDT = NMEA true hdg. derived from mag. hdg. only;

Function: Selects the output data format of the NMEA Fast interface. The NMEAFast interface sends a reduced set of data (heading, rate of turn andheading reference only) at an increased update rate.For special purposes, the NMEA-HCHDT mode is provided, in whichthe interface sends true heading data derived from the magnetic head-ing sensor input by applying magnetic variation and deviation (mag.hdg. calibration).

08


Gyrocompass Data Input Format (Gyro Input)

Settings: PLATH = Plath-formatLEHMKUHL LR 40 = Lehmkuhl-LR 40-formatLEHMKUHL LR 20 = Lehmkuhl-LR 20-format

NMEA HDT = NMEA sentence $..HDTOFF = Interface disabled

Function: Selects the input data format of the gyrocompass interface.

Note: If no second gyrocompass is connected to the system, the gyrocom-pass interface must be set to OFF. Accordingly, the system type mustbe set to G or GM.

Magnetic Compass Data Input Format (Mag Hdg Inp.)

Settings: SIN COS = fluxgate-sensor, sin/cos-typeNMEA HDM = NMEA sentence $..HDM

PLATH-MAGN = Plath-formatOFF = Interface disabled

Function: Selects the input data format of the magnetic compass interface.

Note: If no magnetic compass is connected to the system, the magnetic com-pass interface must be set to OFF. Accordingly, the system type mustbe set to G or GG.

Speed Data Input Format (Speed Input)

Settings: 200 Pulse/NM = pulse log, 200 pulses/nmNMEA-VHW = NMEA sentence $..VHWNMEA-VTG = NMEA sentence $..VTGNMEA-VBW = NMEA sentence $..VBW

Function: Selects the input data format of the speed interface.

Note: In order to receive speed data via the speed interface, speed mode"auto" must be selected in the manual settings menu.

Position Data Input Format (Pos Input)

Settings: NMEA-GLL = NMEA sentence $..GLLNMEA-GGA = NMEA sentence $..GGA

Function: Selects the input data format of the position interface.

Note: In order to receive position data via the position interface, latitude mode"auto" must be selected in the manual settings menu.

09


Sensor Data / Magnetic Heading Output Format (Sens. D. M. outp.)

Settings: NMEA-HCHDM = NMEA sentence $..HDMNMEA-HCHDT = NMEA sentence $..HDTNMEA-HCHDG = NMEA sentence $..HDG

Function: Selects the magnetic heading output data format of the sensor datainterfaces (NMEA and RS 422).

Note: If set to NMEA-HCHDT, the interface sends true heading derived frommagnetic heading by applying magnetic variation and deviation (talker-ID HC) as well as true heading from the gyrocompass (talker-ID HE).Receiving equipment must be able to discriminate between headingdata sources by their talker-IDs.

4.6.3 Analogue Rate Of Turn Output

Settings: scale factor: 0.1 – 999.9 mV/°/mindamping time constant: 0 – 99 sec.

Function: Sets the scale factor and the damping time constant for the analoguerate of turn output.

Note: The maximum output voltage of the analogue rate of turn output islimited to ±10 V.The damping time constant may also be set in the manual settingsmenu.

4.6.4 Rudder Angle Feedback Inputs (Feedback signal)

Settings: No. of rudders: 1/2scale factor 1/2: 0.1 – 99.9 mV/°zero offset 1/2: -9.9° – +9.9°

Function: Configures the rudder angle feedback inputs. If the number of ruddersis set to 1, only the feedback signal from feedback input 1 is read. If thenumber of rudders is set to 2, feedback signals are read from bothfeedback inputs.

The scale factor and zero-point offset can be set independently forboth feedback inputs.

The scale factors for C. PLATH rudder angle feedback units are:49.7 mV/° for units with a rudder angle range of ±45°;31.9 mV/° for units with a rudder angle range of ±70°.

10


Note: Feedback signals are only read to record the rudder angles using thevoyage data printer NAVIPRINT. No rudder angle data is sent to theserial outputs.If the number of rudders is set to 2, NAVIPRINT automatically printstwo rudder angle graphs next to each other.

4.6.5 System Type

Settings: G = single gyrocompassGM = single gyro- and magnetic compassGG = twin gyrocompass

GGM = twin gyro- and magnetic compass

Int/G = internal switchover, single gyrocompassInt/GG = internal switchover, twin gyrocompass

Ext = external switchover via selector switchNSD = internal switchover w. NSD-protocol evaluation

Function: Selects the compass system type and the heading reference switchovermode.

Note: According to the system type settings, unused heading data inputsmust be inactivated in the interface configuration.In twin gyrocompass systems, different compass IDs must be assignedto the individual compasses (see 4.6.6).

4.6.6 Alignment Error Correction Value

Settings: -180.0° – +180.0°

Function: Sets the alignment error correction to the required value. Alignmenterror is 0° if the sides of the compass housing are running exactly par-allel to the vessel's longitudinal axis and the back of the housing pointsdead ahead. The required correction value equals the alignment errorwith the sign reversed.

Note: After correction of the alignment error, the gyrocompass is to displaythe angle between the vessel's longitudinal axis and true north to 0.5°.

4.6.7 Shaft Encoder Correction Angle

Settings: -180.0° – +180.0°

Function: Sets the shaft encoder correction to the required value. The shaft en-coder correction angle is set in the factory and must not be changed.

11


Only when a complete baseplate assembly is to be exchanged, a newcorrection angle must be entered. Each baseplate carries a label indi-cating the required shaft encoder correction angle.

4.6.8 Ext. Status Input

Settings: Status LOG = log statusStatus HDG +180° = turn heading display by 180°

Function: Selects the function to be activated via the external status input. If setto LOG, the external status input reads the status signal from a pulselog. If set to HDG +180°, the heading display can be turned by 180°using an external selector switch (e.g. for operation in ferries).

4.6.9 Name of Gyro

Settings: gyro ID: 1/2/3

Function: Sets the compass' ID. The ID serves to identify the individual gyrocom-passes in multicompass systems.

4.6.10 Test Mode

Settings: rate of turn: -99.9°/min – +99.9°/minscale factor: 0.1 – 99.9 mV

heading: 0.0 – 359.9°

Function: The test mode serves to test the proper function of the analogue rate ofturn output and of the serial and 6 step/° outputs.

In test mode operation, an output voltage corresponding to the set rateof turn and scale factor is present at the analogue rate of turn output.

After initiation of the test mode, the heading data sent to the serial and6 step/° outputs moves from the actual to the set value with the set rateof turn.

The test mode is activated once the user has set a value in the testmode sub-menu. The test mode is quit by leaving the test mode sub-menu.

Note: The test mode provides a convenient method of setting the scale factorof an analogue rate of turn indicator:Set the rate of turn to a suitable value and adjust the scale factor untilthe rate of turn displayed on the indicator matches the set value.

12


4.6.11 Service Setup 1 – Overview

!

* (

INTERFACE I/0

ANALOG. ROT OUTP.

NMEA SUPERFAST

NMEA FAST

GYRO INPUT

MAG HDG INP.

SPEED INPUT

POS INPUT

SENS.D.M.OUTP.

4800 Baud

scale: 0.1 – 999.9 mV/°/mintime const.: 0 – 99 sec.

NMEA

PLATH

SIN COS

9600 Baud

PLATHNMEA-HCHDT

LEHMKUHL LR 40

NMEA-HDM

200 Pulse/NM

NMEA-GLL

NMEA-HCHDM

19200 Baud

LEHMKUHL LR 20

PLATH-MAGN

NMEA-VHW

NMEA-GGA

NMEA-HCHDTNMEA-HCHDG

38400 BaudNMEA-HCHDT

NMEA HDT

OFF

NMEA-VTGNMEA-VBW

OFF

analogue rate of turn output

interface configuration

contd. on next page

13


!

%

!

* (

FEEDBACK SIGNAL rudder angle feedback inputs

NO. OF RUDDERS

1 / 2

SET. RUDDER 1

scale: 0.1 – 99.9 mV/°offset: -9.9° – +9.9°

SET. RUDDER 2

scale: 0.1 – 99.9 mV/°offset: -9.9° – +9.9°

EXT. STATUS INStat. LOGStat. HDG +180°

SHAFT COR. ANGLE-180.0° – +180.0°° –

SYSTEM TYPE

TEST MODE

! '

(

gyro ID

function ext. status input

alignment error correction angle

system type settings

shaft encoder correction angle

type Gtype GMtype GGtype GGM

ALIGN ERR. CORR.-180.0° – +180.0°° –

rate of turn: -999 – +999°/minscale: 0.1 – 999.9 mV/°/minheading: 0.0 – 359.9°

contd. from previous page

hdg. sel. INT/Ghdg. sel. INT/GGhdg. sel. EXThdg. sel. NSD

NAME OF GYROgyro ID.: 1/2/3

test mode

14



01


5 MAINTENANCE INFORMATION AND INSTRUCTIONS

5.1 Maintenance Specifications

All maintenance work is to be carried out by an authorized C. PLATH service station,unless otherwise stated.

Following any maintenance work, the complete gyrocompass system is to be func-tion checked.

5.1.1 Annual Maintenace

C. PLATH recommends that annually the gyrosphere container be opened, its inter-nal surfaces and the gyrosphere be cleaned and the mercury, insulating fluid andsupporting fluid be renewed. If necessary, the centering pin is to be renewed.

5.1.2 Five-Year Maintenance

C. PLATH recommends that at intervals of a maximum of five years, the gyrosphereand the centering pin be renewed.

02


5.2 Maintenance by Shipboard Personnel

5.2.1 Removal of the Gyrosphere Container at Low Ambient Temperatures

At ambient temperatures below 0 °C when the gyrocompass is not in operation, andbelow -10 °C when the gyrocompass is in operation, the gyrosphere container is tobe removed from the compass housing and stored at a place where the ambienttemperature will not fall below 0 °C.If no storage place is available where the ambient temperature will not fall below 0 °C,the gyrosphere is to be removed from the gyrosphere container to prevent damagecaused by frozen supporting fluid. The gyrosphere may be removed only by person-nel of a C. PLATH-authorized service station.

1) De-energize the gyrocompass system.

2) Wait at least 45 minutes for the gyro-scopes to stop rotating.

3) Unscrew the retaining screws of the com-pass housing door and take the door offthe housing.

4) Disconnect the grounding strap betweendoor and housing. If the control and dis-play unit is mounted in the door, unplugthe unit's connector from the masterboard(plug connector J3).

5) Place the door aside.

03


6) Disconnect the plug from the socket onthe gyrosphere container.

7) Put both hands around the gyrospherecontainer, placing the thumbs on the rimof the bellows.

8) Press together bellows and gyrospherecontainer. With the thumbs, turn the bel-lows to the right until the bayonet couplingdisengages.

9) Lift the gyrosphere container out of thecompass housing and carefully transportit to a suitable storage place.

10) Fit the door back on the compass hous-ing and secure it with the retaining screws.

04


5.3 Maintenance by Service Personnel

5.3.1 Gyrosphere Handling and Storage Instructions

The gyrosphere is contained in a shockproof box, which is packed in a transportcontainer. This transport container is completely suitable for transport by air, sea, railand road. The gyrosphere is always to be stored in its original transport container.

The storage temperature is to be between -25 °C and +70 °C. The humidity in thestorage room is to be between 60% and 90%.

The period of storage before the gyrosphere is taken into operation is not to exceed12 months. Gyrospheres stored longer than 12 months before being taken into op-eration are to be tested by an authorized C. PLATH service station before installation.

Caution:The gyrosphere is always to be transported in an original transport container.Do not throw or drop the transport container.The transport container is to be transported in an upright position only.

Upon installation, the gyrosphere is to be removed from the transport container in itsshockproof box and is to be carried by hand directly to the place of installation.

Caution:The shockproof box containing the gyrosphere is only to be transported by hand, andis to be handled with extreme care.

5.3.2 Safety Warning

Installation and removal of the gyrosphere includes the handling of mercury.

The mercury together with insulating fluid is con-tained in a phial enclosed in a sealed box in theinstallation and replacement parts kit.

Warning:Spilt mercury will evaporate and give off poi-sonous fumes.

Spilt mercury is to be gathered up with the sy-ringe provided in the installation and replacementparts kit and sealed in an empty phial.

After installation of the gyrosphere, keep theempty phial in its box in the installation and replacement parts kit. After removal of thegyrosphere, return the phial with the used mercury and insulating fluid to C. PLATHfor recycling.

05


5.3.3 Installation of the Gyrosphere

Note: At the place of installation, a clean and level work surface must be available.

In addition to the parts provided in the installation and replacement parts kit,a 5 mm hexagon key, a medium-sized and a small screwdirver will be neededduring the installation.

For cleaning purposes, a lint-free cloth and alcohol are required.

Caution: Do not use acetone or similar solvents.


2) Remove the gyrosphere container from itstransport box and place it on the work sur-face.

3) Unscrew the centering pin and place itaside (do not yet remove the protectivecap from the pin).

4) Disconnect and remove the plug connec-tor from the base contact.

06


5) Unscrew the captive screws attaching thetwo halves of the gyroshere container.

6) Remove the upper section of thegyrosphere container and place it upsidedown on the work surface.

Caution:Do not damage the golden contact pins.

7) Open the gyrosphere transport box, re-move the top foam rubber pad and place itwith the recess uppermost on the worksurface.

8) Remove the gyrosphere from the transportbox and place it in the foam rubber pad.

9) Take the plastic bowl from the replacementparts kit and place it on the work surface.

10) Remove the protective sticker from the re-cess of the gyroshere. Placing a thumb inthe recess, lift the gyrosphere out of thefoam rubber pad and place it on the plasticbowl.

07


11) Carefully wash the gyrosphere with alco-hol and dry it with a lint-free cloth.

Caution:do not use acetone or similar solvents.

12) Rinse the gyrosphere with fresh support-ing fluid.

Caution:The recess of the gyrosphere must be keptabsolutely clean and dry. Do not use com-pressed air to dry the gyrosphere.

13) Take the box containing the phial of mer-cury and insulating fluid from the installa-tion and replacement parts kit. Removethe phial from the box.

Warning:Spilt mercury will evaporate and giveoff poisonous fumes.

Spilt mercury is to be gathered up withthe syringe provided in the installation andreplacement parts kit and sealed in anempty phial.

14) Open the phial and pour the entire con-tents into the recess of the gyrosphere.The mercury is to form a single drop atthe bottom of the recess.

If necessary, take the syringe and can-nula from the installation kit and gatherthe mercury in a single drop by gentlypressing on it with the tip of the cannula.

15) Close the empty phial and put it back inits box. The phial is to be kept in the in-stallation kit and will be needed to takeup used mercury and insulating fluid dur-ing the removal of the gyrosphere.

08


16) Carefully fill up the recess of thegyrosphere with supporting fluid.

17) Rinse the inside of the lower section ofthe gyrosphere container with supportingfluid.

18) Check that the drain plug is tightenedfirmly. Pour some supporting fluid into thegyrosphere container until the base con-tact is covered by the fluid.

19) Check that the quad ring lies correctly inits groove in the lower section of thegyrosphere container.

Caution:When replacing a gyrosphere, always usea new quad ring.

20) Carefully remove the gyrosphere from theplastic bowl and place it into the container.

21) Rinse the inside of the upper section ofthe gyrosphere container with suppurtingfluid.

22) Carefully fit the upper par t of thegyrosphere container to the lower part.The golden contact pins fit into grooves inthe lower part of the container.

09


25) Fit the funnel into the hole for the centeringpin. Fill up the gyrosphere container withsupporting fluid until excess fluid exits fromthe valve neck. Remove the funnel fromthe gyrosphere container.

24) Remove the outer end of the ventilationvalve from its neck.

23) Tighten the captive screws in a series ofdiagonal opposites.

10


26) Take off the protective cap from thecentering pin and rinse the pin thoroughlywith supporting fluid.

27) Screw in the centering pin and tighten itfirmly by hand.

28) Draw up some supporting fluid with thesyringe and inject it into the open end ofthe ventilation valve until the remaining airhas exited the container (remaining air isvisible through the translucent top of thecontainer). Gently tilt the container, if nec-essary.

11


29) Attach the free end of the ventilation valveto its neck.

30) Carefully dry the gyrosphere container witha lint-free cloth.

31) Connect the power cable to the centeringpin and firmly tighten the terminal screw.

32) Insert the base plug connector through thehole in the lower section of the container.Lift the container to the shoulder, keepingit in a vertical position. Connect the plugto the base contact.

33) Place the container back on the work sur-face.

34) If replacing a gyrosphere, place the pro-vided label with the new gyrosphere's se-rial number on the magnetic shield of thegyrosphere container.

12


34) Unscrew the retaining screws of the com-pass housing door and take off the doorfrom the housing

35) Disconnect the grounding strap betweendoor and housing. If the operating andcontrol unit is mounted in the door, dis-connect the unit from the masterboard(plug connector J3). Place the door aside.

36) Gently turn the bellows, until the rubbertongue points towards the front of thehousing.

13


37) Place the gyrosphere container into thecompass housing with the pointer locateddirectly below the tongue of the bellows.

38) Put both hands around the container andlift it into the bellows. Turn the containerto the left until the coupling engages.

39) While supporting the countainer with thepalms, put the thumbs on the rim of thebellows and press together bellows andcontainer. With the thumbs, turn the bel-lows to the left to lock the coupling.

40) Connect the plug to the socket on thegyrosphere container.

41) Put the door in front of the housing andconnect the grounding strap. Connect thecontrol and display unit to the masterboard(plug connector J3).

42) Fit the door on the housing and tightenthe retaining screws.

14


Function test

1) Energize the gyrocompass system.

2) In the service setup 2, select the gyrosphere data sub-menu.

Observe the gyrosphere current:

Directly after power-up, the gyrosphere current should not exceed 550 mA.The current will gradually fall while the gyrosphere settles.Within 45 minutes after power-up, the gyrosphere current must have droppedbelow 300 mA.

0 1

0+

* + 1!

After initial power-up, gyrospherecurrent must drop below 300 mAwithin 45 minutes.

If, after 45 minutes of operation, a gyrosphere current above 300 mA is dis-played in the gyrosphere data sub-menu, measure the AC-voltage presentacross resistor R150 (1Ω) on the masterboard. The voltage across R150 inmV equals the gyrosphere current in mA.

Caution:

If 45 minutes after power up, the gyrosphere current has not dropped below300 mA, the gyrosphere is defective and must be replaced.

15



2) Wait at least 45 minutes for the gyro-scopes to stop rotating.

3) Unscrew the retaining screws of the com-pass housing door and take the door offthe housing.

5.3.4 Removal of the Gyrosphere

4) Disconnect the grounding strap betweendoor and housing. If the control and dis-play unit is mounted in the door, unplugthe unit's connector from the masterboard(plug connector J3).

5) Place the door aside.

6) Disconnect the plug from the socket onthe gyrosphere container.

16


7) Put both hands around the gyrospherecontainer, placing the thumbs on the rimof the bellows.

8) Press together bellows and gyrospherecontainer. With the thumbs, turn the bel-lows to the right until the bayonet couplingdisengages.

9) Take the gyrosphere container out of thecompass housing and lift it to the shoul-der, keeping it in a vertical position. Dis-connect the plug connector from to thebase contact and pull the cable throughthe hole in the lower section of the con-tainer.

10) Place the container on the work surface

11) Take the plastic bowl from the installationand replacement parts kit and place it un-der the drain plug of the gyrosphere con-tainer.

17


12) Unscrew the terminal screw in the centeringpin. Remove the contact from the pin andtighten the screw.

13) Unscrew the centering pin and remove itfrom the gyrosphere container.

14) Wash and dry the centering pin. Put theprotective cap on the tip of the pin.

15) Unscrew the drain plug and let the support-ing fluid run into the bowl.

Screw in and tighten the drain plug.

18


16) Unscrew the captive screws attaching thetwo sections of the gyrosphere container.

17) Remove the upper section of thegyrosphere container and place it upsidedown on the work surface.

Caution:Do not damage the golden contact pins.

18) Take the box containing the phial of mer-cury and insulating fluid from the installa-tion and replacement parts kit. Removethe phial from the box and open it.

Warning:Spilt mercury will evaporate and giveoff poisonous fumes.

Spilt mercury is to be gathered up withthe syringe provided in the installation andreplacement parts kit and sealed in anempty phial.

19


19) Insert the syringe with the cannula intothe recess of the gyrosphere. Draw up themercury and insulating fluid completely.

20) Inject the mercury and insulating fluid intothe empty phial.

21) Placing a thumb in the recess of thegyrosphere, lift the gyrosphere out of thecontainer and pour the remaining support-ing fluid from the recess into the plasticbowl.

22) Place the gyrosphere back into the lowersection of the gyrosphere container.

23) If there is any mercury left in the plasticbowl, take it up with the syringe and injectit into the phial.

24) Close the phial and put it back into thebox.

25) Return the box with the phial to C. PLATHfor recycling.

Note:Used mercury and insulating fluid may notbe reused. When replacing the gyro-sphere, always use fresh mercury and in-sulating fluid.

20


26) Discard the supporting fluid from the plas-tic bowl.

Note:The supporting fluid is not poisonous.

27) Placing a thumb in the recess of thegyrosphere, lift the gyrosphere out of thegyrosphere container and place it in theplastic bowl.

28) Using a lint-free cloth and alcohol, care-fully wash and dry the gyrosphere.

Caution:Do not use acetone or similar solvents.

29) Thoroughly clean the contact surfaces ofthe gyrosphere with the stainless steelwool pad provided in the installation andreplacement parts kit.

30) Seal the recess of the gyrosphere with aprotective sticker. Stickers are included inthe installation and replacement parts kitand with replacement gyrospheres.

31) Pack the gyrosphere in its shockproof boxand pack the box in the original transportcontainer.

21


32) Discard the remaining supporting fluidfrom the lower section of the gyrospherecontainer.

33) Using a lint-free cloth and alcohol, thor-oughly wash and dry the inside of thegyrosphere container.

34) Carefully fit the upper section of thegyrosphere container to the lower section.The golden contact pins fit into grooves inthe lower section of the container.

35) Tighten the captive screws in a series ofdiagonal opposites.

36) Screw in the cetering pin and tighten itfirmly by hand.

37) Pack the gyrosphere container in its origi-nal transport box.

38) Fit the door back on the compass hous-ing and secure it with the retaining screws.

22



Page A-01


citengamssapmocgnidaeh

mag. hdg. display1KMXTAGIVAN

)detarbilacnu(

noitcerroceulav

°0

°01

°02

°03

°04

°05

°06

°07

°08

°09

°001

°011

°021

°031

°041

°051

°061

°071

mag. hdg. displaycitengamssapmocgnidaeh

1KMXTAGIVAN)detarbilacnu(

noitcerroceulav

°081

°091

°002

°012

°022

°032

°042

°052

°062

°072

°082

°092

°003

°013

°023

°033

°043

°053

A TABLES

A1 Magnetic Compass Calibration Table

Use this table to note heading display and correction values during the calibration ofthe magnetic compass display (see 4.5).

Page A-02


A2 Standard Manual Settings

Use this table to note the standard (preferred) settings of the parameters settable inthe manual settings menu.

Speed/Latitude

Heading difference alarm

North speed error correction

Settings NAVIPRINT

Settings rate of turn

auto

pos1

ON

ON

___ °

___ sec.

___ °/min

man

man

OFF

OFF

speed mode

position mode

automatic correction

output to printer

paper feed speed

heading scale

rudder scale

diff. alarm threshold

damping time constant

max. ROT alarm threshold

monitor diff. between

GY1/GY2OFF

GY1/MAG GY2/MAG

±9°OFF

±45° ±70°

±30° ±180°

60 mm/h 150 mm/h 600 mm/h

Page A-03


A3 Basic Configuration Settings (Service Setup 1)

Interface I/O

sensor data outputmag. hdg. data format

4800 Baud38400 Baud

9600 BaudNMEA-HCHDT

19200 BaudNMEA Superfastsend baudrate

NMEA Fastsend protocol

gyrocompass inputdata format

magnetic compass inputdata format

speed inputdata format

position inputdata format

PLATHNMEA-HDT

Lehmkuhl LR 20OFF

Lehmkuhl LR 40

NMEA PLATH

NMEA-GLL NMEA-GGA

Sin CosOFF

NMEA-HDM PLATH-Magn.

200 Pulse/NMNMEA-VTG

NMEA-VHWNMEA-VBW

Lehmkuhl LR 40

NMEA-HCHDM NMEA-HCHDT NMEA-HCHDG

Analogue rate of turn output

scale factor

damping time const.

___ mV/°/min

___ sec.

Feedback signal

no. of rudders

zero-offset

1 2

System type

r.1: ___ mV/°/min r.2: ___ mV/°/min

r.1: ___ ° r.2: ___ °

scale factor

system type

hdg. select mode

GGGM

GM GG

INT/GNSD

INT/GG EXT

Alignment error correction

correction value ___ °

Shaft encoder correction value

correction value ___ °

Ext. status in

status

Name of gyro

gyro ID 1 2 3

LOG HDG +180°

NMEA-HCHDT

Page A-04


A4 North Speed Error TablesThe tables give the north speed error δ of an uncorrected gyrocompass in degrees,i.e. the correction which must be applied to the gyrocompass heading in order toobtain true heading.

Lat. Heading Speed (kts.)

North South5 10 15 20 25 30 35 40 45 50

- - + +

0

0 360 180 180 0.3 0.6 1.0 1.3 1.6 1.9 2.2 2.5 2.9 3.2

30 330 150 210 0.3 0.5 0.8 1.1 1.4 1.6 1.9 2.2 2.5 2.7

45 315 135 225 0.2 0.4 0.7 0.9 1.1 1.3 1.6 1.8 2.0 2.2

60 300 120 240 0.2 0.3 0.5 0.6 0.8 1.0 1.1 1.3 1.4 1.6

70 290 110 250 0.1 0.2 0.3 0.4 0.5 0.7 0.8 0.9 1.0 1.1

80 280 100 260 0.1 0.1 0.2 0.2 0.3 0.3 0.4 0.4 0.5 0.6

90 270 90 270 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

30

0 360 180 180 0.4 0.7 1.1 1.5 1.8 2.2 2.6 2.9 3.3 3.7

30 330 150 210 0.3 0.6 1.0 1.3 1.6 1.9 2.2 2.5 2.9 3.2

45 315 135 225 0.3 0.5 0.8 1.0 1.3 1.6 1.8 2.1 2.3 2.6

60 300 120 240 0.2 0.4 0.5 0.7 0.9 1.1 1.3 1.5 1.6 1.8

70 290 110 250 0.1 0.3 0.4 0.5 0.6 0.8 0.9 1.0 1.1 1.3

80 280 100 260 0.1 0.1 0.2 0.3 0.3 0.4 0.4 0.5 0.6 0.6

90 270 90 270 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

40

0 360 180 180 0.4 0.8 1.2 1.7 2.1 2.5 2.9 3.3 3.7 4.1

30 330 150 210 0.4 0.7 1.1 1.4 1.8 2.2 2.5 2.9 3.2 3.6

45 315 135 225 0.3 0.6 0.9 1.2 1.5 1.8 2.0 2.3 2.6 2.9

60 300 120 240 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.7 1.9 2.1

70 290 110 250 0.1 0.3 0.4 0.6 0.7 0.8 1.0 1.1 1.3 1.4

80 280 100 260 0.1 0.1 0.2 0.3 0.4 0.4 0.5 0.6 0.6 0.7

90 270 90 270 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

45

0 360 180 180 0.4 0.9 1.3 1.8 2.2 2.7 3.1 3.6 4.0 4.5

30 330 150 210 0.4 0.8 1.2 1.6 1.9 2.3 2.7 3.1 3.5 3.9

45 315 135 225 0.3 0.6 1.0 1.3 1.6 1.9 2.2 2.5 2.9 3.2

60 300 120 240 0.2 0.4 0.7 0.9 1.1 1.3 1.6 1.8 2.0 2.2

70 290 110 250 0.2 0.3 0.5 0.6 0.8 0.9 1.1 1.2 1.4 1.5

80 280 100 260 0.1 0.2 0.2 0.3 0.4 0.5 0.5 0.6 0.7 0.8

90 270 90 270 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

50

0 360 180 180 0.5 1.0 1.5 2.0 2.5 3.0 3.5 3.9 4.4 4.9

30 330 150 210 0.4 0.9 1.3 1.7 2.1 2.6 3.0 3.4 3.8 4.3

45 315 135 225 0.3 0.7 1.0 1.4 1.7 2.1 2.4 2.8 3.1 3.5

60 300 120 240 0.2 0.5 0.7 1.0 1.2 1.5 1.7 2.0 2.2 2.5

70 290 110 250 0.2 0.3 0.5 0.7 0.8 1.0 1.2 1.3 1.5 1.7

80 280 100 260 0.1 0.2 0.3 0.3 0.4 0.5 0.6 0.7 0.8 0.9

90 270 90 270 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Page A-05


The tables give the north speed error δ of an uncorrected gyrocompass in degrees,i.e. the correction which must be applied to the gyrocompass heading in order toobtain true heading.


North South5 10 15 20 25 30 35 40 45 50

- - + +

55

0 360 180 180 0.6 1.1 1.7 2.2 2.8 3.3 3.9 4.4 5.0 5.5

30 330 150 210 0.5 1.0 1.4 1.9 2.4 2.9 3.4 3.8 4.3 4.8

45 315 135 225 0.4 0.8 1.2 1.6 2.0 2.3 2.7 3.1 3.5 3.9

60 300 120 240 0.3 0.6 0.8 1.1 1.4 1.7 1.9 2.2 2.5 2.8

70 290 110 250 0.2 0.4 0.6 0.8 0.9 1.1 1.3 1.5 1.7 1.9

80 280 100 260 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

90 270 90 270 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

60

0 360 180 180 0.6 1.3 1.9 2.5 3.2 3.8 4.4 5.1 5.7 6.4

30 330 150 210 0.5 1.1 1.6 2.2 2.7 3.3 3.8 4.4 4.9 5.5

45 315 135 225 0.4 0.9 1.3 1.8 2.2 2.7 3.1 3.6 4.0 4.5

60 300 120 240 0.3 0.6 1.0 1.3 1.6 1.9 2.2 2.5 2.9 3.2

70 290 110 250 0.2 0.4 0.7 0.9 1.1 1.3 1.5 1.7 2.0 2.2

80 280 100 260 0.1 0.2 0.3 0.4 0.6 0.7 0.8 0.9 1.0 1.1

90 270 90 270 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

65

0 360 180 180 0.7 1.5 2.3 3.0 3.8 4.5 5.3 6.0 6.8 7.5

30 330 150 210 0.6 1.3 1.9 2.6 3.2 3.9 4.6 5.2 5.9 6.5

45 315 135 225 0.5 1.1 1.6 2.1 2.7 3.2 3.7 4.2 4.8 5.3

60 300 120 240 0.4 0.7 1.1 1.5 1.9 2.3 2.6 3.0 3.4 3.8

70 290 110 250 0.3 0.5 0.8 1.0 1.3 1.5 1.8 2.1 2.3 2.6

80 280 100 260 0.1 0.3 0.4 0.5 0.7 0.8 0.9 1.0 1.2 1.3

90 270 90 270 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

68

0 360 180 180 0.8 1.7 2.5 3.4 4.2 5.1 5.9 6.8 7.6 8.5

30 330 150 210 0.7 1.5 2.2 2.9 3.7 4.4 5.1 5.9 6.6 7.3

45 315 135 225 0.6 1.2 1.8 2.4 3.0 3.6 4.2 4.8 5.4 6.0

60 300 120 240 0.4 0.8 1.3 1.7 2.1 2.5 3.0 3.4 3.8 4.2

70 290 110 250 0.3 0.6 0.9 1.2 1.4 1.7 2.0 2.3 2.6 2.9

80 280 100 260 0.1 0.3 0.4 0.6 0.7 0.9 1.0 1.2 1.3 1.5

90 270 90 270 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

70

0 360 180 180 0.9 1.9 2.8 3.7 4.6 5.6 6.5 7.4 8.4 9.3

30 330 150 210 0.8 1.6 2.4 3.2 4.0 4.8 5.6 6.4 7.2 8.1

45 315 135 225 0.7 1.3 2.0 2.6 3.3 3.9 4.6 5.2 5.9 6.6

60 300 120 240 0.5 0.9 1.4 1.9 2.3 2.8 3.2 3.7 4.2 4.6

70 290 110 250 0.3 0.6 1.0 1.3 1.6 1.9 2.2 2.5 2.9 3.2

80 280 100 260 0.2 0.3 0.5 0.6 0.8 1.0 1.1 1.3 1.4 1.6

90 270 90 270 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Page A-06


he tables give the north speed error δ of an uncorrected gyrocompass in degrees, i.e.the correction which must be applied to the gyrocompass heading in order to obtaintrue heading.


North South5 10 15 20 25 30 35 40 45 50

- - + +

74

0 360 180 180 1.1 2.3 3.5 4.6 5.8 6.9 8.1 9.2 10.4 11.6

30 330 150 210 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0

45 315 135 225 0.8 1.6 2.4 3.3 4.1 4.9 5.7 6.5 7.3 8.2

60 300 120 240 0.6 1.1 1.7 2.3 2.9 3.5 4.0 4.6 5.2 5.8

70 290 110 250 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.1 3.5 3.9

80 280 100 260 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

90 270 90 270 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

76

0 360 180 180 1.3 2.6 3.9 5.2 6.6 7.9 9.2 10.5 11.9 13.2

30 330 150 210 1.1 2.3 3.4 4.5 5.7 6.8 8.0 9.1 10.3 11.4

45 315 135 225 0.9 1.9 2.8 3.7 4.6 5.6 6.5 7.4 8.4 9.3

60 300 120 240 0.7 1.3 2.0 2.6 3.3 3.9 4.6 5.2 5.9 6.6

70 290 110 250 0.4 0.9 1.3 1.8 2.2 2.7 3.1 3.6 4.0 4.5

80 280 100 260 0.2 0.5 0.7 0.9 1.1 1.4 1.6 1.8 2.0 2.3

90 270 90 270 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

78

0 360 180 180 1.5 3.0 4.6 6.1 7.6 9.2 10.7 12.3 13.9 15.4

30 330 150 210 1.3 2.6 4.0 5.3 6.6 7.9 9.3 10.6 12.0 13.3

45 315 135 225 1.1 2.2 3.2 4.3 5.4 6.5 7.6 8.7 9.7 10.8

60 300 120 240 0.8 1.5 2.3 3.0 3.8 4.6 5.3 6.1 6.9 7.6

70 290 110 250 0.5 1.0 1.6 2.1 2.6 3.1 3.7 4.2 4.7 5.2

80 280 100 260 0.3 0.5 0.8 1.1 1.3 1.6 1.9 2.1 2.4 2.6

90 270 90 270 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

80

0 360 180 180 1.8 3.7 5.5 7.3 9.2 11.0 12.9 14.8 16.7 18.6

30 330 150 210 1.6 3.2 4.7 6.3 7.9 9.5 11.1 12.7 14.4 16.0

45 315 135 225 1.3 2.6 3.9 5.2 6.5 7.8 9.1 10.4 11.7 13.0

60 300 120 240 0.9 1.8 2.7 3.7 4.6 5.5 6.4 7.3 8.2 9.2

70 290 110 250 0.6 1.2 1.9 2.5 3.1 3.7 4.4 5.0 5.6 6.3

80 280 100 260 0.3 0.6 1.0 1.3 1.6 1.9 2.2 2.5 2.9 3.2

90 270 90 270 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

72

0 360 180 180 1.0 2.1 3.1 4.1 5.1 6.2 7.2 8.2 9.3 10.3

30 330 150 210 0.9 1.8 2.7 3.6 4.4 5.3 6.2 7.1 8.0 8.9

45 315 135 225 0.7 1.5 2.2 2.9 3.6 4.4 5.1 5.8 6.5 7.3

60 300 120 240 0.5 1.0 1.5 2.1 2.6 3.1 3.6 4.1 4.6 5.1

70 290 110 250 0.4 0.7 1.1 1.4 1.8 2.1 2.5 2.8 3.2 3.5

80 280 100 260 0.2 0.4 0.5 0.7 0.9 1.1 1.2 1.4 1.6 1.8

90 270 90 270 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Page A-07


he tables give the north speed error δ of an uncorrected gyrocompass in degrees, i.e.the correction which must be applied to the gyrocompass heading in order to obtaintrue heading.


North South5 10 15 20 25 30 35 40 45 50

- - + +

81

0 360 180 180 2.0 4.1 6.1 8.1 10.2 12.2 14.3 16.4 18.6 20.7

30 330 150 210 1.8 3.5 5.3 5.7 7.0 10.6 12.4 14.2 16.6 17.8

45 315 135 225 1.4 2.9 4.3 5.7 7.2 8.6 10.1 11.5 13.0 14.5

60 300 120 240 1.0 2.0 3.0 4.1 5.1 6.1 7.1 8.1 9.2 10.2

70 290 110 250 0.7 1.4 2.1 2.8 3.5 4.2 4.9 5.6 6.2 6.9

80 280 100 260 0.4 0.7 1.1 1.4 1.8 2.1 2.5 2.8 3.2 3.5

90 270 90 270 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

82

0 360 180 180 2.3 4.6 6.8 9.1 11.5 13.8 16.2 18.5 21.0 23.4

30 330 150 210 2.0 3.9 5.9 7.9 9.9 11.9 13.9 16.0 18.0 20.1

45 315 135 225 1.6 3.2 4.8 6.5 8.1 9.7 11.3 13.0 14.7 16.3

60 300 120 240 1.1 2.3 3.4 4.6 5.7 6.8 8.0 9.1 10.3 11.5

70 290 110 250 0.8 1.6 2.3 3.1 3.9 4.7 5.5 6.2 7.0 7.8

80 280 100 260 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 4.0

90 270 90 270 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

83

0 360 180 180 2.6 5.2 7.8 10.5 13.1 15.8 18.5 21.3 24.1 27.0

30 330 150 210 2.3 4.5 6.8 9.0 11.3 13.6 16.0 18.3 20.7 23.1

45 315 135 225 1.8 3.7 5.5 7.4 9.2 11.1 13.0 14.9 16.8 18.7

60 300 120 240 1.3 2.6 3.9 5.2 6.5 7.8 9.1 10.5 11.8 13.1

70 290 110 250 0.9 1.8 2.7 3.6 4.5 5.3 6.2 7.1 8.0 8.9

80 280 100 260 0.5 0.9 1.4 1.8 2.3 2.7 3.2 3.6 4.1 4.5

90 270 90 270 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

84

0 360 180 180 3.0 6.1 9.1 12.2 15.3 18.5 21.7 25.0 28.4 31.9

30 330 150 210 2.6 5.3 7.9 10.6 13.2 16.0 18.7 21.5 24.4 27.3

45 315 135 225 2.1 4.3 6.4 8.6 10.8 13.0 15.2 17.4 19.7 22.0

60 300 120 240 1.5 3.0 4.6 6.1 7.6 9.1 10.7 12.2 13.8 15.3

70 290 110 250 1.0 2.1 3.1 4.2 5.2 6.2 7.3 8.3 9.4 10.4

80 280 100 260 0.5 1.1 1.6 2.1 2.6 3.2 3.7 4.2 4.7 5.3

90 270 90 270 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

85

0 360 180 180 3.6 7.3 11.0 14.7 18.5 22.4 26.4 30.5 34.8 39.4

30 330 150 210 3.2 6.3 9.5 12.7 15.9 19.3 22.6 26.1 29.6 33.3

45 315 135 225 2.6 5.1 7.7 10.3 13.0 15.6 18.3 21.0 23.8 26.7

60 300 120 240 1.8 3.6 5.5 7.3 9.1 11.0 12.8 14.7 16.6 18.5

70 290 110 250 1.2 2.5 3.7 5.0 6.2 7.5 8.7 10.0 11.3 12.5

80 280 100 260 0.6 1.3 1.9 2.5 3.2 3.8 4.4 5.1 5.7 6.3

90 270 90 270 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Page A-08



GYRO compass.pdf

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