Inhibit Mode - Garmin GPS 400W,GNC 420W Pilot's Manual & Reference

2 - NAV PAGES
Terrain Operation
The TERRAIN Page has two selectable view
settings:
• 360˚ View—View from above aircraft depicting
surrounding terrain on all sides
• 120˚ View—View of terrain ahead of and 60˚ to
either side of the aircraft flight path
TERRAIN Page
NOTE: The TERRAIN Page gives a "Track Up" dis-
play orientation, as indicated by the "TRK" label
shown on the display. This is the only orientation
available on this page.
To display a 120˚ view:
Select the TERRAIN Page and press MENU.
1.
2. Select "View 120˚?".
3. Press ENT. To switch back to a 360˚ view,
repeat step 1, select "View 360˚?", and press
ENT.
Seven display ranges are available, allowing for a
more complete view of the surrounding area.
To change the display range:
1. Select the TERRAIN Page and press up or down
on the RNG key to select the desired range:
1 NM, 2 NM, 5 NM, 10 NM, 25 NM, 50 NM,
100 NM.
Aviation information such as airports, VORs,
and other navaids can be turned on or off from the
TERRAIN Page.
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To show or hide aviation data:
1. Select the TERRAIN Page and press MENU.
2. Select "Show (or Hide) Aviation Data" and
press ENT. Pressing the CLR key when the
TERRAIN Page is displayed will also toggle
aviation information on or off.

Inhibit Mode

The Garmin TERRAIN system provides an
"inhibit mode". This mode is designed to deactivate
Premature Descent Alert/Forward Looking Terrain
Avoidance (PDA/FLTA) visual alerts when they are
deemed unnecessary by the pilot. Flying VFR into
an area where unique terrain exists could cause the
system to annunciate a nuisance alert. Pilots should
use discretion when inhibiting the TERRAIN system
and always remember to enable the system when
appropriate. When terrain is inhibited, the Terrain
page will still be active, but alerts and messages will
not be generated. See the Terrain Alerts section for
more information on terrain alerts.
Inhibiting Terrain