TM 11-4920-292-15
in AH-1G and UH-1 aircraft.
centered and the target is aligned with the
(2) Place the compass transmitter in the
horizontal crosshair.
aircraft mounting bracket and partially fasten
the three mounting screws.
(5) Be sure that the target is centered in
the crosshair.
NOTE
(6) Secure the compass transmitter by
For bottom-mounted compass trans-
tightening the mounting screws.
mitters, make aircraft electrical con-
(7) Check the alignment.
nections and mount the compass sys-
tem magnetic compensator before in-
(8) Remove the optical transfer equip-
ment from the compass transmitter.
stalling the compass transmitter in
the aircraft.
(3) Sight the telescope on the target estab-
a. Set up the equipment as follows:
lished in b(4) above by rotating the compass
(1) Disconnect cable (W2) from the turn-
transmitter until the target is aligned with the
table assembly.
vertical crosshair.
(2) Refer to table 9-1 and perform the
(4) Level the telescope with the leveling
compass system calibration in accordance with
adjustment screws until the bubble level is
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