GPS 400 Pilot’s Guide and Reference
190-00140-60 Rev. E
SECTION 12 – MESSAGES,
ABBREVIATIONS, & NAV TERMS
12-1
SECTION 12: MESSAGES, ABBREVIATIONS, AND NAV TERMS
12.1 MESSAGES
The GPS 400 uses a flashing ‘MSG’ annunciator at the bottom of the screen (directly above the
MSG
Key) to alert the
pilot of any important information or warnings. While most messages are advisory in nature, warning messages may
require pilot intervention.
When the ‘MSG’ annunciator flashes, press the
MSG
Key to display the message. Press the
MSG
Key again to return
to the previous page.
The following is a list of available messages and their meanings:
Message
Description
Airspace ahead -- less
than 10 minutes
The GPS-calculated course is projected to enter a special use airspace within 10 minutes.
This message is automatically disabled within 30 nm of an arrival airport, when an approach
is loaded.
Airspace near and
ahead
The GPS-calculated position is within 2 nm of the boundary of a special use airspace and the
course is projected to enter the airspace within 10 minutes. This message is automatically
disabled within 30 nm of an arrival airport, when an approach is loaded.
All data referenced to
True North
The GPS 400 has not detected a NavData Card in the left data card slot.
Altitude input failure
The GPS 400 is configured to receive altitude serializer data (Icarus, Rosetta, or Shadin) and
it is not being received. Or, the data was being received, but has been interrupted. If a grey
code altitude input is available, it is used instead. If the problem persists, contact a Garmin
dealer and check the installation and installation settings. When this message occurs, no
pilot action is required if enough satellites are available for a 3D position fix (provided no
RAIM warnings are present). However, if only a 2D position fix is possible, the pilot should
maintain the GPS altitude within 1,000 feet of pressure altitude by entering the altitude on
the Position Page.
Approach is not active
The approach could not transition to ‘active’, at 2 nm or closer to the FAF. Verify that ‘SUSP’
does not appear directly above the OBS Key, indicating the auto waypoint sequencing is
suspended. This message also appears if Receiver Autonomous Integrity Monitoring (RAIM)
has determined that sufficient GPS satellite coverage does not exist for the current phase of
flight (along with a ‘RAIM not available from FAF to MAP’ message).
Approaching target
altitude
The current GPS-computed altitude is within 500 feet of the final Vertical Navigation target
altitude.
