TB 43-0123
AT-640AIARN
EIC: NIA
C-6347/ASN-43 Compass Control
1. Brief Description: The C-6347/ASN-43 Compass
2. Applicable Tools and Test Equipment:
Control is used with the AN/ASN43 system on the
AH-1S aircraft. It essentially performs functions in
See data sheet for AN/ASN-43.
the AH-1S that are performed by the ID-1351 or ID-
998 and AM-3209 in other aircraft. It serves to
3. Applicable Publications:
electrically synchronize and mechanically align the
TM 11-6605-202-12
AN/ASN-43 to the correct magnetic heading when
TM 11-6605-202-24P
used in the MAG mode of operation. It transfers
heading information from the T-611IASN to the CN-
998/ASN43 in the MAG mode and operates the relay
in the CN-998 to place the AN/ASN-43 into the MAG
or DC mode of operation. The synchronizing knob
on the C-6347 may be used as a set heading knob
for
operation
in
the
DG
mode.
II-B-38
