Inhibit Mode - Garmin GPS 500 Pilot's Manual & Reference

Inhibit Mode

TERRAIN has an inhibit mode that deactivates the FLTA/
PDA aural and visual alerts. Pilots should use discretion
when inhibiting TERRAIN and always remember to enable
the system when appropriate. For more information, see
Section 10.3, TERRAIN alerts.
Inhibiting TERRAIN:
Select the TERRAIN Page and press the MENU
1)
Key. 'Inhibit Terrain?' is selected by default
(Figure 2-31).
Figure 2-31 TERRAIN Page Menu
2) Press the ENT Key. The 'TER INHB' annunciation
is displayed in the annunciator field when
TERRAIN is inhibited (Figure 2-32).
Annunciator Field
Figure 2-32 TERRAIN Annunciator Field
Enabling TERRAIN:
Select the TERRAIN Page and press the MENU
1)
Key. 'Enable Terrain?' is selected by default.
2) Press the ENT Key. The TERRAIN system is
functional again.
190-00181-60 Rev. G
TERRAIN Symbols
The following symbols (Figure 2-33) are used to
represent obstacles and potential impact points on the
TERRAIN Page.
• Red Symbol - Terrain/Obstacle is above or within
100 feet below the aircraft altitude
• Yellow Symbol - Terrain/Obstacle is between 100
feet and 1000 feet below the aircraft altitude
• Black Symbol - Terrain/Obstacle is more than
1000 feet below the aircraft altitude
Unlighted
Obstacles
<1000 feet AGL
GPS 500 Pilot's Guide and Reference
NOTE: See Section 10.2 for a complete
description of TERRAIN symbology.
NOTE: Obstacle symbols are shown on display
zoom ranges up to 10 nm.
Lighted
Obstacles
<1000 feet AGL
Lighted Potential
Obstacles Impact Points
>1000 feet AGL
Figure 2-33 TERRAIN Symbols
NOTE: If an obstacle and the projected flight path
of the aircraft intersect, the display automatically
zooms in to the closest potential point of impact
on the TERRAIN Page.
SECTION 2
NAV PAGES
Unlighted
Obstacles
>1000 feet AGL
2-17