Garmin HTAWS User Guide - Page 40

TAWS Operation

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Part Three: Section 2 TAWS Operation Inhibit Mode TAWS provides an "inhibit mode". This mode is designed to deactivate PDA/FLTA aural and visual alerts when they are deemed unnecessary by the aircrew. 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 TAWS system and always remember to enable the system when appropriate. Only the PDA and FLTA alerts are disabled in the inhibit mode. See section 3 for more information on TAWS alerts. TERRAIN configured units will restore the "inhibit state" at startup to the last pilot-selected setting. TAWS configured units will always start up with TAWS alerts uninhibited. The annunciation is displayed in the terrain annunciator field whenever TAWS is inhibited. To enable PDA and FLTA alerts: 1. Select the TAWS Page and press MENU. "Enable Terrain?" is selected by default. 2. Press ENT. The PDA/FLTA alerts are functional again. External TAWS Inhibit Control An optional installation is allowed for providing an external TAWS Inhibit switch. Pressing the external TAWS Inhibit switch toggles the TAWS inhibit on and off in the same manner as using the Page Menu selection. 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. "Test TAWS" selection To manually test the TAWS system: 1. Select the TAWS Page and press MENU. 2. Select the "Test TAWS?" option. 3. Press ENT to confirm the selection. An aural message is played giving the test results: Inhibiting Terrain To inhibit PDA and FLTA alerts: 1. Select the TAWS Page and press MENU. "Inhibit Terrain?" is selected by default. 2. Press ENT. The PDA/FLTA alerts are inhibited. • "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 knots so as not to impede TAWS alerting. 34 190-00356-30 Rev H

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34
Part Three:
Section 2
TAWS Operation
Inhibit Mode
TAWS provides an “inhibit mode”. This mode is
designed to deactivate PDA/FLTA aural and visual
alerts when they are deemed unnecessary by the
aircrew. 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 TAWS system and always remember to enable the
system when appropriate. Only the PDA and FLTA
alerts are disabled in the inhibit mode. See section 3
for more information on TAWS alerts.
TERRAIN configured units will restore the “inhibit
state” at startup to the last pilot-selected setting. TAWS
configured units will always start up with TAWS alerts
uninhibited.
Inhibiting Terrain
To inhibit PDA and FLTA alerts:
1.
Select the TAWS Page and press
MENU
.
“Inhibit Terrain?” is selected by default.
2.
Press
ENT
. The PDA/FLTA alerts are inhibited.
The
annunciation is displayed in
the terrain annunciator field whenever TAWS
is inhibited.
To enable PDA and FLTA alerts:
1.
Select the TAWS Page and press
MENU
.
“Enable Terrain?” is selected by default.
2.
Press
ENT
. The PDA/FLTA alerts are functional
again.
External TAWS Inhibit Control
An optional installation is allowed for providing
an external TAWS Inhibit switch. Pressing the external
TAWS Inhibit switch toggles the TAWS inhibit on and off
in the same manner as using the Page Menu selection.
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.
“Test TAWS” selection
To manually test the TAWS system:
1.
Select the TAWS Page and press
MENU
.
2.
Select the “Test TAWS?” option.
3.
Press
ENT
to confirm the selection.
An aural message 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 knots so as not to impede TAWS alert-
ing.
190-00356-30 Rev H