Gyro Compass MARK 27 MOD 1.

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FIGURE 2-119. Gyro Compass MK 27 Mod 1 Electronic Control Panel.

TM-55-1905-223-10 Landing Craft Utility (LCU 200 Class) NSN 1905-01-154-1191 Manual

FIGURE 2-120. Standard Bearing Repeater.

TM 55-1905-223-10

NOTE

Compass will slew rapidly if the gyro is encaged.

(4) Set SELECTOR switch (4) to SLEW position.

NOTE

Compass will slew rapidly if the gyro is uncaged.

(5) Observe if CAGED indicator (9) is lit. If not lit, press CAGED BUTTON (1) on top of binnacle to

cage gyro, and wait 5 minutes for ballistic fluid to stabilize.

NOTE

In the (+) position, the card rotates counterclockwise; in the (-) position, the card rotates clockwise.

(6) To slew heading, use TILT/AZIMUTH switch (5) to rotate the compassrd to approximate ship

a c

heading.

(7) Set SELECTOR switch (4) to START position. Wait 10 minutes before proceeding.

(8) Press CAGED BUTTON (1) on top of binnacle. CAGED indicator (9) will go OFF.

(9) Set SELECTOR switch (4) to MANUAL LEVEL position.

(10) Use TILT/AZIMUTH switch (5) to level gyro. Gyro is level when LEVEL METER (2) indicates zero.

(11) Set SELECTOR switch (4) to RUN position.

(12) Set N-S switch (8) as required.

(13) Set LATITUDE control (6) to ship latitude.

CAUTION

Do not operate synchonizer knob when repeater switch is energized.

(14) On standard Bearing Repeaters (FIGURE 2-120), press and hold SYNCHRONIZER KNOB (2) to

engage gear train.

(15) Rotate REPEATER CARD (1) to Gyro Compass heading.

(16) Release SYNCHRONIZER KNOB (2).

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