Garmin GPS 400 Pilot's Manual And Reference page 149

FPL waypoint was deleted
—At least one flight plan (FPL) way-
point is no longer available when a new NavData® card was
installed (database change).
GPS has failed
—The GPS 400 has detected a failure in its GPS
receiver. The GPS receiver is not available and the unit should be
returned to your GARMIN dealer for service.
GPS is not responding
—Internal system-to-system communica-
tion between the main processor and the GPS receiver has failed.
Operational status of the GPS receiver is unknown and the unit
should be returned to your GARMIN dealer for service.
GPS needs service
—The GPS 400 has detected a failure in its
GPS receiver. The GPS receiver may still be usable, but the unit
should be returned (at your earliest convenience) to your GARMIN
dealer for service.
GPS stored data was lost
—Satellite almanac, ephemeris and time
data have been lost due to a memory battery failure, system reset or
data expiration (data over six months old).
Inside airspace
—Your GPS-calculated position lies within the
boundaries of a special use airspace. This message is automatically
disabled within 30 nautical miles of an arrival airport, when an
approach is loaded.
Invalid closest pt of FPL
—A closest point cannot be created from
the waypoint entered on the "Closest point of flight plan" window.
This occurs when the selected waypoint is beyond the limits of all
legs in the flight plan, too far away, or when a unique waypoint name
for the closest point cannot be created.
Invalid FPL modifications
—An attempt was made to modify the
final course segment (FAF to MAP) of an instrument approach. The
GPS 400 will not allow the modifications.
Invalid waypoint ident
—An attempt was made to create a user
waypoint with an invalid name. The GPS 400 will not allow spaces
between characters in the waypoint name.
MAIN processor requires service
failure in the main system processor. The GPS 400 is not usable and
should be taken to your GARMIN dealer for service.
Memory battery low
—The internal battery that sustains user
memory is low and should be replaced by a GARMIN dealer as soon
as possible. Failure to do so may result in loss of stored data, includ-
ing flight plans, user waypoints, unit settings and satellite data.
Near airspace -- less than 2 nm
within 2 nautical miles of a special use airspace boundary, but you
are not projected to enter the airspace. This message is automatical-
ly disabled within 30 nautical miles of an arrival airport, when an
approach is loaded.
MESSAGES,
8
aBBREVIATIONS
& nav tERMS
—The GPS 400 has detected a
—Your GPS-calculated position is