Table 3-1. Preventive Maintenance Checks and Services
D - Daily
W - Weekly
Q - Quarterly
S - Semiannually
A - Annually
Items To Be
TANK LEVEL INDICATOR SYSTEM - CONT
Inspect for corrosion, tightness, and evidence of
burning. Replace defective potentiometers as specified
in paragraphs 3-41 and 3-42.
NAVIGATION SIGNALS AND SEARCHLIGHTS
Check reading. Lamp should be replaced every 1500-1600
hours. See paragraph 3-46.
NOTE: DONE PRIOR TO GETTlNG UNDERWAY
These tests and adjustments should be
done prior to getting underway and
in the order listed.
a. Visual Wiring Check. Check wiring and component
mounting for possible causes of damage from vibration,
chafing, strain, overheating, and short circuits from
b. Power Source Check. Check power leads for correct
polarity and voltage using a voltmeter.
Gyrocompass Alignment and Calibration.
d. Alignment. After the gyrocompass is restarted, adjust
the gyro interface course reference dial to align with