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 TM 55-1905-223-10
c. Synchronize compass repeaters after ship service power fail.ure
NOTE
The master compass and electronic control of the MK 27 Mod 1 gyro compass operate directly
from an external 24 Vdc power source. A ship service power failure will not effect the gyro
compass, but compass repeaters must be reset.
(1) On gyro compass MK 27 MOD 1 Electronic Control Panel (FIGURE 2-119), set R,PTR switch (7) to
OFF position.
CAUTION
Do not operate synchronizer knob when repeater switch is energized.
(2) On Open Scale Compass Repeater (FIGURE 2-121), press and hold SYNCHRONIZEF KNOB (1) to
engage gear train.
(3) Rotate REPEATER CARD (2) to gyro compass heading.
(4) Release SYNCHRONIZER KNOB (1).
(5) On Standard Bearing Repeater (FIGURE 2-120), press and hold SYNCHRONIZER KNOB (2) to
engage gear train.
(6) Rotate REPEATER CARD (1) to gyro compass heading.
(7) Release SYNCHRONIZER KNOB (2).
(8) On Gyro Compass Mk 27 Mod 1 Electronic Control Panel (FIGURE 2-1,1set RPTR switch (7) to
9)
ON position.
d.
Autopilot Mode
NOTE
Autopilot mode allows hands-off steering of vessel.
Change 2
2-365/(2-366 blank)
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