Session VIIISession VIII Discrepancy Discrepancy

Presentation Presentation ObjectivesObjectives

To acquire a general knowledge of the responsibilities of the Auxiliary on how discrepancies and verification checks are performed.

To become familiar with the three categories of AtoN discrepancies.

To learn how to recognize a discrepancy on an aid to navigation.

Discrepancy Discrepancy CategoriesCategories

CriticalCritical UrgentUrgent RoutineRoutine

Definition of CriticalDefinition of Critical

This term is used for those

discrepancies where failure

to report by the most

expeditious means may

result in loss of life or

damage to a vessel.

Critical DiscrepanciesCritical Discrepanciesa. Aid totally covered or

shrouded in ice.

b. Light signal showing improper characteristics or rhythm.

c. Light signal obscured or extinguished.

d. Sinking or submerged buoy.

e. Buoy off station, adrift, missing, capsized or stranded.

f. Vandalism of aids.

g. Aids damaged by vessel collision.

h. Collapsed bridge structures.

i. RAdar beaCON not operating.

j. Lantern damaged

Definition of UrgentDefinition of UrgentThis term is used forthose discrepancieswhere failure to reportwill result in no danger of loss of life or vesseldamage, but maycontribute to a groundingor a stranding.

Urgent DiscrepanciesUrgent Discrepanciesa. Daymark(s) missing

or damaged by causes other than vandalism.

b. Sound signal failure.Bell, Gong, Horn, etc.

c. Light burning dim or showing reduced intensity.

d. Lights partly or totally obscured by dayboards.

e. Bridge light outages.

f. Inoperative draw on swing, lift or retractable bridges.

Definition of RoutineDefinition of Routine

Term is used for those

discrepancies where failure to

report will result in very low

likelihood of grounding or

stranding, but corrective

maintenance is necessary.

Routine DiscrepanciesRoutine Discrepancies

a. Aid obscured by foliage or other objects that should be removed.

b. Faded daymarks, whether located on aids in the water or on the shore.

c. Extensive bird fowling on aid.

d. Delaminating of Dayboards.

e. Dayboard missing.

f. Improper dayboards per Light List.

g. Extensive deterioration or rotting of supports.

h. Leaning structure—more than 15 degrees.

And there’s more. . .

Routine DiscrepanciesRoutine Discrepancies

i. Missing vent valve.

j. Bird nest on aid that is obstructing light or panels

k. Retroreflective material is peeling, missing or inadequate.

l. Numbers are obliterated or not easily read or identified.

m.Peeling paint interfering with the ability to see the aid or recognize its proper color.

n. Whistle, tapper, or bell missing.

AID

DEFECTS

MORE

ISSUES

Small Lights Small Lights and Daymarksand Daymarks

Don’t

get

too

close

to this

ATON!

Stay

in the

channel.

Check after storms.

Panels are designed to break away so that high

winds or waves will

not take out the pile.

Panel

Symbol

KWRMain panel is white.

Center stripe is red.

Operational Requirements

ContrastVegetation

Background

lights

Inspection and Maintenance Dayboard surface and backing

materials will deteriorate due to the effects of weathering by: wind, rain, freezing temperatures, and sunlight.

Inspection and Maintenance Types of delamination are:

Cracking,

Peeling. and

Fading.

Backing Material Delamination should not have

progressed over more than 25 percent of the backing material.

Material should not be sufficiently warped to visibly detract from the signal.

Mounting points should not be softened or deteriorated to the degree that the board may come loose during a storm.

Films, Numbers, Letters, & Borders

Delamination of the film should not progress over 10% of the surface area.

Material should not be cracked, checked or abraded so as to provide a dull or roughened top surface.

Material attached should not have peeled over more than 10% of the surface area.

Fading There is no practical way to measure

fading.

Replacement is based on the judgment of servicing personnel.

It must display the intended signal until the next scheduled service.

END END OF OF SESSION VIIISESSION VIII