Garmin GPS 400 Pilot's Manual And Reference page 150

MESSAGES,
8
aBBREVIATIONS
& nav tERMS
Need altitude - display position page
altitude input in order to start and/or continue 2D navigation. Select
the position page and verify the altitude reading. If the altitude is in
error by more than 500 feet, enter the current altitude as accurately
as possible. An inaccurate altitude will directly translate into inaccu-
rate position information.
No altitude input is being received
received from RS-232 (Serializer: Icarus, Rosetta or Shadin) or grey
code inputs. If the problem persists, contact your GARMIN dealer
and check the installation and installation settings. When this mes-
sage occurs, no pilot action is required if enough satellites are avail-
able for a 3D position fix (provided no RAIM warnings are present).
However, if only a 2D position fix is possible, the pilot should main-
tain the GPS altitude within 1,000 feet of pressure altitude—by
entering the altitude on the position page.
No basemap data available
in the built-in basemap (land data) memory. Land data will not
appear on the map page. Other unit functions will continue to work
normally, however the GPS 400 should be taken to your GARMIN
dealer for service at your earliest convenience.
—The GPS receiver needs
—No altitude data is being
—The GPS 400 has detected a failure
Non-WGS84 wpt navigation
—The active "to" and/or "from" way-
points are based upon a map datum other than WGS 84 and cannot
be converted from that map datum to WGS 84. Expect some error
in the position of the waypoint(s) and cross-check with an alternate
means of navigation.
Not receiving input data on 429 Channel #1
been received on the ARINC 429 channel #1 connection for a period
exceeding five seconds. If the problem persists, the installation
should be checked by your GARMIN dealer.
Not receiving input data on 429 Channel #2
been received on the ARINC 429 channel #2 connection for a period
exceeding five seconds. If the problem persists, the installation
should be checked by your GARMIN dealer.
Not receiving input data on 232 Channel #1
been received on the RS-232 channel #1 connection for a period
exceeding ten seconds. If the problem persists, the installation
should be checked by your GARMIN dealer.
O
OBS key stuck
—The key is stuck in the enabled (or pressed)
O
state. Try pressing the key again to cycle its operation. If the
message persists, contact your GARMIN dealer for assistance.
Poor GPS coverage
—The GPS receiver cannot acquire a sufficient
number of satellites to compute a position and provide navigation.
Power down and re-initialize
position due to abnormal satellite conditions. The unit is unusable
until power has been cycled off and back on. Abnormal satellite
conditions may exist and you may need to use an alternate means of
navigation.
—No data has
—No data has
—No data has
—The GPS 400 cannot calculate a