Garmin GNS 430(A) Manual

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GNS 430(A) Pilot’s Guide and Reference

190-00140-00 Rev. P

10-13

SECTION 10

AUX PAGES

• 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

ight. RAIM availability is near 100% in Oceanic,

Enroute, and Terminal phases of ight. Because

the FAA’s TSO requirements for non-precision

approaches specify signiﬁcantly better satellite

coverage than other ight phases, RAIM may not

be available when ying 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 ight to conrm 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 decient, the TERRAIN system

fails the self-test and issues a failure message.