Garmin GNC 420A Skrócona instrukcja obsługi - Strona 20

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Garmin GNC 420A Skrócona instrukcja obsługi

FLYING AN APPROACH

Activating the approach with vectors to

final:

With an approach loaded in the active flight

plan, press the PROC Key to display the

Procedures Page.

Turn the large right knob to highlight 'Activate

Vector-To-Final?' and press the ENT Key.

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 the following general guidelines

in mind while flying the approach:

• The pilot will typically select the destination airport

as the last waypoint in the active flight plan or

using the Direct-to Key. Doing so ensures that

the desired waypoint will automatically appear

when choosing the 'Select Approach?' option from

the Procedures Page. (Otherwise, first choose the

airport, then the approach procedure.)

• 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 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').

GNC 420/420A Quick Reference

190-00140-21 Rev. F