Gyrocompass. - TM-55-1915-200-100521

TM 55-1915-200-10

NOTE

b. Set ON/OFF switches on upper left side of

Wait 5 to 10 seconds between

control boxes (1 and 2, FIGURE 2-116, Sheet 1 of 4)

reversals of direction to permit the

above each compressor to OFF (down).

servoamplifier to stabilize.

c. Set circuit breakers No. 3 (freeze room) and

No. 4 (chill room) to OFF on power panel P2 in upper

machinery room (FIGURE 2-110).

f. Use the TILT/AZIMUTH switch (9) to rotate the

compass card to the approximate ship's course.

d. Turn OFF door seal heater, (14, FIGURE 2-116,

Sheet 4 of 4).

NOTE

In the (+) position, the card rotates

2-5.4.5. Gyrocompass.

counterclockwise; in the (-) position,

the card rotates clockwise.

NOTE

Compass starting procedure should

begin at least 2 hours before the

g. Position MODE SELECTOR switch (7) to start.

compass is to be used to allow

Wait 10 minutes before proceeding.

proper settling.

The compass

h. Depress caging control (1) on top of binnacle.

should also have been stopped for a

Notice that caged lamp (15) extinguishes.

minimum of 1/2 hour before

i. Position MODE SELECTOR switch (7) to

restarting.

MANUAL LEVEL.

j. Operate TILT/AZIMUTH switch (9) to level the

a. Set the gyrocompass power converter switch

gyro as indicated by the LEVEL METER (3) indicating

No. 25 (Figure 2-117) on the Pilothouse Emergency

zero.

Distribution Panel EP2 to the ON position.

k. Position the MODE SELECTOR switch (7) to

b. Set the gyrocompass MK 37 transmitter switch

RUN.

No. 23 to the ON position.

1. Position N-S switch (14) as required.

c. Position RPTR switch (12, FIGURE 2-117) to

m. Position LATITUDE control (13) to ship's

OFF.

latitude.

d. Position MODE selector switch (7) to slew.

n. On compass repeater (FIGURE 2-118), press

synchronizer knob (4) to engage gear train.

NOTE

o. Rotate the repeater card (5) to agree with

The compass will slew rapidly if the

master compass.

gyro is uncaged.

p. Release synchronizer knob (4).

e. Note that CAGED lamp (15) is lit. If it is not,

depress caging control (1) on top of binnacle to cage the

gyro and wait 5 minutes for the ballistic fluid to stabilize.

2-357