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 TM 55-1925-204-12
Table 3- Operator/Crew Preventive Maintenance Checks and Services - Continued
Tug Diesel Large Design 3006
B - Before
A - After
M - Monthly
D - During
B/A - Biannually
Q - Quarterly
Intervals
Item
Item To Be
Procedure
Equipment Will Be Reported
No.
BDA
M Q B/A
Inspected
Not ready/Available If:
25
Magnetic compass
Check compass for bubbles and
l
loss of fluid. Ensure compass will
swing freely (pointer moves
smoothly). Check heading on two
known courses. Check deviation
whenever electronic/metal struc-
ture changes are made. Ensure
deviation card is up to date, and
annual deviation has been posted.
26
Gyrocompass
Check gyrocompass for proper
Gyrocompass indicates
operation/error. Put compass on
malfunction error. Use
line in accordance with data plate
back up magnetic corn-
instructions. Ensure gyrocom-
pass evidence error/mal-
pass has time to warmup/settle
function the vessel will be
prior to getting underway. While
reported not ready.
underway/sailing determine gyro
error daily by celestial azimuth or
terrestural bearing and record in
DA Form 55-40 (Deck Log Book).
27
Radar
Conduct functional check of the radar
Radar is inoperative.
to insure satisfactory operation.
28
Communication/
See applicable TM's outlined in
Communication between
electronics
TB 43-0117, Feb 76. (Marine Elec-
vessels on
equipment:
tronics Configuration Directory).
navigation and
AN/URC-92
Conduct an operational test of
safety channels
AN/VRC-46
communication equipment to en-
and between vessel
AN/SRC-6A
sure satisfactory operation of
and Port Authority
AN/URC-80(v)1
equipment.
is impaired. Radar
AN/PRC-94
does not perform
LS 518/519/S1C
properly.
OK-295/URC-80
AN/SPS-59(v)1
AN/SQN-15
AN/SRN-18
AN/SSN (MK-27)
ID Type B repeater
PP-7078/U
PP-2953/U
AS-3095/URC
PP-7334/U
Other CN&E
equipment in-
stalled as mis-
sion required.
29
Clinometer
Check to ensure vessel is on even
Vessel is listing to port or
o
keel. No port or stbd list.
stbd 5 or more.
Transfer fuel if list is evident.
Change 3 3-7
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