PROCEDURE TROUBLESHOOTING REFERENCE
Depress. Key will dim.
Right display Check. Display
should read 1-XX4, indicating
that the INS is in the TACAN
Data selector (while in flight) L/L
WYPT or UTM WYPT.
simultaneously. The number of
the TACAN station being used
for navigation shall flash on and
number of stations eligible for
mixing will be displayed. A " 0 "
indicates that none of the 9
stations are eligible for update.
Mixing will not take place if TACAN
station data is loaded in error or if the
ratio of the distance from the station to
the aircraft altitude is less than 2 to 1.
indicate the range to the station
used for update. If no station is
being used for update, the