Garmin GDL 69A Pilot's Manual Addendum - Page 36

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Part Three: Section 2

TAWS Operation

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 Terrain" selection

To manually test the TAWS system:

Select the TAWS Page and press MENU.

Select the "Test Terrain?" option.

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 fail the test

NOTE: TAWS System Testing is disabled when ground

speed exceeds 30 knots so as not to impede TAWS

alerting.

The symbols depicted below are used to represent

obstacles and potential impact points on the TAWS

Page. Note that obstacle symbols are shown on display

zoom ranges up to 10 NM.

Alerts are issued when ﬂight conditions meet

parameters that are set within TAWS software algo-

rithms that detect a potentially hazardous situation.

TAWS alerts typically employ either a CAUTION or a

WARNING alert severity level, or both. When an alert

is issued, visual annunciations are displayed. Aural

alerts are simultaneously issued.