Garmin GNS 430 Pilot's Manual And Reference page 171

• RAIM Prediction - Predicts if GPS coverage is
available for the current location or at a specified
waypoint at any time and date. Receiver
Autonomous Integrity Monitoring (RAIM)
performs checks to ensure that the GNS 430
will have adequate satellite geometry during the
flight. RAIM availability is near 100% in Oceanic,
Enroute, and Terminal phases of flight. Because
the FAA' s TSO requirements for non-precision
approaches specify significantly better satellite
coverage than other flight phases, RAIM may not
be available when flying some approaches. The
GNS 430 automatically monitors RAIM during
approach operations and warns the pilot if RAIM
is not available. In such cases, use the GNS 430' s
VLOC receiver instead for many of the non-
precision and precision approaches stored on the
Jeppesen NavData card. RAIM prediction helps
the pilot plan for a pending flight to confirm GPS
operation during an approach.
An 'INTEG' annunciation at the bottom left
corner of the screen (Figure 10-32) indicates that
satellite coverage is insufficient to pass built-in
(RAIM) tests. When this occurs, the GPS receiver
continues to provide navigation information,
but should not be used for primary navigation
guidance. Use the GNS 430' s VLOC receiver or
another suitable navigation source.
Figure 10-32 'INTEG' Annunciation
If a 'WARN' annunciation appears at the
bottom left corner, GPS satellite coverage may
be sufficient, but the GNS 430 has detected a
position error which exceeds protection limits.
In this condition, all GPS navigation data on the
GNS 430 is disabled. Use the GNS 430' s VLOC
receiver or an alternate navigation source.
• Sunrise/Sunset - Allows the pilot to calculate the
time of sunrise and sunset at any waypoint or the
present position for a specified date.
• Software Versions - Provides software version
information for the operating software within the
GPS receiver, COM transceiver, VOR/localizer
receiver, glideslope receiver, and main processor
board.
• Database Versions - Displays the current Jeppesen
database type and expiration date, along with the
version and type of built-in land database.
• Terrain Database Versions - Displays the current
version and area of coverage of each terrain and
obstacle database. If a database is found to be
missing and/or deficient, the TERRAIN system
fails the self-test and issues a failure message.
GNS 430 Pilot's Guide and Reference
SECTION 10
AUX PAGES
10-13