TM 55-1510-221-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
(4)
HOLD key - Depress and check illuminated.
Coordinates in data display shall freeze at values
present when Hold key was pressed.
NOTE
While HOLD key is illuminated, TACAN,
GPS, and data link updates are inhibited
n.
UTM Inertial Position - Check as follows:
(1)
Data selector - UTM WYPT (check HOLD key
illuminated).
(2)
Left-hand display - Read northing in kilometers.
(3)
Right-hand display - Read zone and easting in
kilometers.
(4)
Compare with values from UTM Position
procedure.
(5)
INSERT/ADVANCE - Depress.
(6)
Right-hand display - Read zone and extra precision
easting values to the nearest meter.
(7)
HOLD key - Depress to return the INS to normal
operation HOLD key will dim.
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