GNS 530(A) Pilot’s Guide and Reference 190-00181-00 Rev. E
SECTION 3
NAV PAGES
3-20
TAWS Manual Test
Garmin TAWS provides a manual test capability which
verifies the proper operation of the aural and visual
annunciations of the system prior to a flight.
Manually testing the TAWS system:
1) Select the TAWS Page and press the MENU
Key.
2) Turn the large right knob to highlight the ‘Test
Terrain?’ option (Figure 3-40).
Figure 3-40 TAWS Page Menu
3) Press the ENT Key to confirm the selection.
‘TER TEST’ is annunciated in yellow on the TAWS Page.
One of the following aural messages is played giving the
test results:
• “TAWS System Test, OK”, if the system passes the
test.
• “TAWS System Failure” if the system fails the test.
NOTE: TAWS system testing is disabled when
ground speed exceeds 30 kts, so as not to impede
TAWS alerting.
TAWS Symbols
NOTE: See Section 13.2 for a complete
description of TAWS symbology.
The following symbols (Figure 3-41) are used to
represent obstacles and potential impact points on the
TAWS 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
NOTE: Obstacle symbols are shown on display
zoom ranges up to 10 nm.
Unlighted
Obstacles
<1000 feet AGL
Lighted
Obstacles
<1000 feet AGL
Unlighted
Obstacles
>1000 feet AGL
Lighted
Obstacles
>1000 feet AGL
Potential
Impact Points
Figure 3-41 TAWS 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 TAWS Page.