In-Flight (continued)
Indication Problem
MSG light is on.
Displayed message is:
LORAN1 [or 2]
STATIONS HAVE
SIGNAL BLINK
Ifthe Loran sensor is selected as thein-use
position sensor, a blink condition is
occurring.This isasignal generatedbythe
operator of the transmitter indicating a
temporary technical problem with the
transmitted signal.
Action
Signal information appears normal. The
MSG clears when the problem clears.
Indication Problem
MSG light is on.
Displayed message is:
LORAN1 [or 2]
TD SENSOR 1 [or 2]
FAILURE
The Loran TD sensor has failed.
Action
Return MCLS for service.
Indication Problem
Bearing and distance
displays appear to be
wrong.
A mistake was made in entering the
Latitude/Longitude coordinates of a User
waypoint, or the wrong waypoint is
selected.
Action
Verify that coordinates of the User
waypoint are accurate. Check the
hemispheric identifier. Check the
“From” and “To” waypoints.
Verify that “ManualMagVar” hasnot
been selected and set to an incorrect
value.
315
Apollo NMS Troubleshooting
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