FLYING AN APPROACH
GUideLineS foR fLyinG an aPPRoaCh
Due to the variety of available approach procedures,
the specific steps required will vary according to the
approach selected. Keep in mind the following while
flying the approach:
• Selecting the destination airport as the last
waypoint in the active flight plan, or using the
Direct-to Key ensures that the desired waypoint
will automatically appear when choosing the
'Select Approach?' option from the Procedures
Page. Otherwise, the airport should be selected
first, then the approach procedure.
• As the aircraft progresses to each approach
waypoint, a waypoint alert message ('NEXT
DTK # # #º') will appear along the bottom of the
display (see page 14).
• Turn advisories ('TURN TO # # #º') will appear
along the bottom of the display (see page 14)
when the pilot should begin a course change (via
a standard rate turn).
• For GPS-based approaches, receiver autonomous
integrity monitoring (RAIM) monitors satellite
conditions and alerts the pilot using an 'INTEG'
or 'WARN' annunciation at the bottom left corner
of the display (see page 14) 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.
20
• Within 30 nm of the destination airport, CDI
scaling will transition from 5.0 nm (enroute
mode, 'ENR') to 1.0 nm (terminal mode, 'TERM')
or when leaving the departure airport, from 1.0 to
5.0 nm. Within 2.0 nm of the final approach fix,
GPS-based approaches will see a second transition
from 1.0 to 0.3 nm (approach mode, 'APR').
• A 'START PROC TRN' prompt will appear along
the bottom 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 along the
bottom 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).
GPS 500 Quick Reference
190-00181-61 Rev. D
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