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Troubleshooting
Verify your position by activating the
Emergency Search Listing. The correct
bearing/distance to the nearest airports should be
displayed.
Indication
MSG light stays on
after power-up.
Displayed message is:
LORAN1
STATIONS
HAVE
LOW SNR
Indication
(Same as above).
Indication
(Same as above).
316
In-Flight (continued)
Hint
On The Ground
The wrong Loran GRI is manually
selected.
Use Auto GRI, or manually select an
appropriate GRI.
Required secondary is shut down.
Check Loran signals in SYS mode to
see if unit is receiving signals from
each station.
Signal is weak due to distance from
transmitters.
You may not obtain lock-on until
after takeoff.
Apollo NMS
Problem
Action
Problem
Action
Problem
Action
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