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. If the VLOC receiver will be used for the approach,
be sure to switch the external CDI (or HSI) to ‘VLOC’ by pressing the CDI Key (‘VLOC’ will appear directly above the CDI Key; see page 15).
. An ‘Auto ILS CDI’ setting provides automatic
switching to ‘VLOC’ once established inbound on the final course segment of an approach.
. As the aircraft progresses to each approach
waypoint, a waypoint alert message (‘NEXT DTK # # #o’) will appear in the lower right corner of the display (see page 15).
. When the pilot should begin a course change (via a
standard rate turn), turn advisories (‘TURN TO # # #o’) will appear in the lower right corner of the display (see page 15).
. For GPS-based approaches, receiver autonomous
integrity monitoring (RAIM) will monitor satellite conditions and alert the pilot using an ‘INTEG’ or ‘WARN’ annunciation at the bottom left corner of the display (see page 15) if protection limits cannot be maintained. If this occurs, the GPS receiver should not be used for primary navigation guidance. Revert to an alternate navigation source, or select an alternate destination airport.
. Within 30 nautical miles of the destination airport,
CDI scaling will transition from 5.0 nautical miles (enroute mode, ‘ENR’) to 1.0 nautical mile (terminal mode, ‘TERM’) or when leaving the departure airport, from 1.0 nm to 5.0 nm. Within
2.0 nautical miles of the final approach fix, GPS-based approaches will see a second transition from
1.0 nautical mile to 0.3 nautical mile (approach mode, ‘APR’).
. A ‘START PROC TRN’ prompt will appear in the lower right corner of the display to advise the pilot when the aircraft is at a safe distance to initiate a procedure turn. The procedure turn is displayed on the Map Page, but guidance through the turn itself is not provided.
. Alerts for proper holding pattern entry (e.g.’ HOLD DIRECT’) are displayed in the lower right corner of the display. Waypoint sequencing is automatically suspended (indicated by ‘SUSP directly above the OBS Key) at the holding waypoint. Press the OBS Key again to return to automatic waypoint sequencing. For course reversals, waypoint sequencing is suspended for one trip around the holding pattern only (after which it will return to automatic waypoint sequencing).
. The CDI will guide the pilot through a DME arc. Just keep the needle centered to fly along the arc. When using an autopilot, the course select on the CDI (or HSI) must be periodically updated with the desired track (DTK).
. When crossing the missed approach point, ‘SUSP’ will appear above the OBS Key, indicating that automatic sequencing of waypoint is suspended at the missed approach point, and a ‘from’ indication will appear on the CDI (or HSI).
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本文链接地址：GNS 430/430A Quick Reference 快速参考(11)
