TM 55-1510-221-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
G. AVIONICS FLIGHT CHECKS (CONT)
f.
Latitude and longitude position - Check as follows:
(1)
Data selector - L/L POS
(2)
Displays - Read present position
latitude in the left-hand display and
present position longitude in the
right-hand display. Both display
indications are to a tenth of a
minute.
(3)
HOLD key - Depress. Key will
illuminate. Latitude and longitude
displays will freeze at the values
which were present when the HOLD
key was depressed.
NOTE
While the HOLD key is illuminated, TA-
CAN, GPS, and data link updates are inhib-
ited
g.
Latitude and longitude inertial position - Check as
follows:
(1)
Data selector - L/L WYPT (HOLD
key should still beilluminated).
(2)
Left-hand and right-hand displays -
Read latitude and longitude of
present position to a tenth of a
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