Garmin GPS 400, Quick Reference

GPS 400 Quick Reference

190-00140-61  Rev. E

FLYING AN APPROACH

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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 in the lower right corner of 
the display (see page 14).

•  Turn advisories (‘TURN TO # # #º’) will appear in 

the lower right corner 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.

•  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 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).