Garmin Appliance Data User's Guide Page 44

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Part Three: Section 2
TAWS Alerts
Section 3: TAWS Alerts
Alerts are issued when flight conditions meet
parameters that are set within TAWS software algorithms.
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. Annunciations appear in a
dedicated field in the lower left corner of the display.
TAWS Annunciation Field
TAWS Annunciation Field
Annunciations are color-coded according to the TAWS
Alert Summary table. Pop-up terrain alerts can also
appear during an alert, but only when the TAWS Page
is not displayed. There are two options when an alert
is displayed:
To acknowledge the pop-up alert and return to
the currently viewed page:
Press the CLR button.
To acknowledge the pop-up alert and quickly
access the TAWS Page:
Press the ENT button.
NOTE: To further capture the attention of the
pilot, TAWS issues aural (voice) messages that
accompany visual annunciations and pop-up
alerts. Some aural messages are configurable
during installation of the system. For a summary
of aural messages, see the TAWS Alert Summary
table.
NOTE: TAWS Caution Alerts are displayed as
constant black text on a yellow background;
TAWS Warning Alerts are displayed as constant
white text on a red background.
Forward Looking Terrain Avoidance
The unit will issue terrain alerts not only when the
aircraft altitude is below the terrain elevation but also
when the aircraft is projected to come within minimum
clearance values of the terrain. This alerting, called Forward
Looking Terrain Avoidance (FLTA), is also provided for
obstacles. Any potential impact points are depicted on the
display. There are 2 levels of severity for FLTA alerts. They
are cautionary (amber) and warning (red) in nature and
are described in further detail below.
CAUTION—Estimated potential impact in approximately 30 sec-
onds after a FLTA Caution pop-up alert and annunciation. FLTA
caution alerts are accompanied by the aural message Caution
Terrain; Caution Terrain OR “Terrain Ahead; Terrain Ahead.
Similarly, a “Caution Obstacle; Caution Obstacle” or “Obstacle
Ahead; Obstacle Ahead” alert is also provided. The time to an
alert can vary with conditions, therefore there is no guarantee
of a 30 second caution alert being issued.
190-00356-30 Rev L
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