Garmin GNS 430 - Manual (Page 173)

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Messages
The GNS 430 uses a flashing “MSG” annunciator at the bottom of
the screen (directly above the M key) to alert you of any important
information or warnings. While most messages are advisory in nature,
warning messages may require your intervention.
Whenever the “MSG” annunciator flashes, press the M key to
display the message. Press M again to return to the previous page.
The following is a list of available messages and their meanings:
Airspace ahead -- less than 10 minutes —Your GPS-calculated
course is projected to enter a special use airspace within 10 minutes.
This message is automatically disabled within 30 nautical miles of an
arrival airport, when an approach is loaded.
Airspace near and ahead —Your GPS-calculated position is within
2 nautical miles of the boundary of a special use airspace and your
course is projected to enter the airspace within 10 minutes. This mes-
sage is automatically disabled within 30 nautical miles of an arrival
airport, when an approach is loaded.
Altitude input failure —The GNS 430 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 will be used instead. If the
problem persists, contact your GARMIN dealer and check the
Section 11
Messages, Abbreviations and Navigation Terminology MESSAGES,
aBBREVIATIONS
& nav tERMS
11
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 posi-
tion 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 nautical miles or closer to the FAF. Verify that “SUSP” DOES NOT
appear directly above the
O 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 phase of flight you are
currently in (along with a “RAIM not available from FAF to MAP” mes-
sage).
Approaching target altitude —The current GPS-computed altitude is
within 500 feet of the final Vertical Navigation target altitude.
Approaching VNAV profile —You are within one minute of reaching
the initial Vertical Navigation descent, or climb, point.
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