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 TM 55-1925-273-10-2
OPERATOR'S MANUAL
INLAND AND COASTAL LARGE TUG (LT)
PREVENTIVE MAINTENANCE CHECKS AND SERVICES INCLUDING LUBRICATION
PILOTHOUSE TOP AND MASTS
Table 1. Operator Preventive Maintenance Checks and Services
ITEM INTERVAL MAN-
ITEM TO BE
PROCEDURE
EQUIPMENT
NO.
HOUR
CHECKED OR
NOT READY/
SERVICED
AVAILABLE IF:
WARNING
Radar and radio equipment transmit
harmful radiation. Ensure that all
transmitting devices are properly
secured, locked out, and tagged out
(FM 55-502) prior to allowing
personnel to work on the pilothouse
top and masts. Failure to comply may
result in serious injury or death.
1
Before
0.2
MAGNETIC
a. When underway, check heading
COMPASS
against gyro on two known courses.
b. Check deviation whenever metal
structural changes are made to the
vessel, or when electronic equipment
is added/removed.
Magnetic
c. Check that the deviation card is
Compass
current and that the annual deviation
card is located in immediate vicinity
of the compass.
d. Check the compensating magnets,
Magnetic compass
and if damage is found, refer to unit
is inoperative and/or
maintenance.
the compass will
not swing freely
in its gimbal.
Magnetic
Compass
Viewer
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