TM 11-6605-202-12/TO 5N3-3-10-1
IN FLIGHT OPERATION
3-13. The following procedure provides you with the information needed for inflight operation.
a. Set the MAG-DG switch to either MAG mode for magnetically slaved operation, or DG mode for free
gyro operation
NOTE
DG mode of operation is recommended when flying
in latitudes higher than 70.
b. When operating in MAG mode, the compass set will remain synchronized.
During normal operation (MAG mode), the annunciator will fluctuate slightly about center position.
During certain rapid aircraft maneuvers, the compass set may become unsynchronized. The annunciator
will move off center when this happens. The slaving circuits in the compass set will return the set to syn-
chronization.
NOTE
For fast synchronization, turn the synchronizing knob in the direction
indicated by the annunciator until the annunciator is centered again.
d. When operating in DG mode, periodically update the compass set heading to a known reference
(declination) by rotating the synchronizing knob.
STOPPING PROCEDURE
3-14. The following procedure provides you with the information needed to shut off the compass set.
a. Remove aircraft power to the compass set.
b. Note that the power failure indicator on course indicator 1 or the power failure meter on course in-
dicator 2 appears.
Note that panel lights on either course indicator 1, course indicator 2, or compass controller ex-
tinguish.
3-18
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