(4) HOLD key - Depress and check illuminated. Coordinates in data display shall freeze at values
present when Hold key was pressed.
While HOLD key is illuminated, TACAN and data link updates
UTM Inertial Position - Check as follows: (1) Data selector - UTM WYPT (check HOLD key
(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) Left-hand display - Read extra precision northing values to nearest meter.
(7) Right-hand display - Read zone and extra precision easting values to the nearest meter.
(8) HOLD key - Depress to return the INS to normal