Garmin GTX 330 GPS Receiver User Manual


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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 in Appendix A.
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
seconds after pop-up alert and annunciation. FLTA caution
alerts are accompanied by the aural message “Caution Ter-
rain; Caution Terrain” OR “Terrain Ahead; Terrain Ahead”.
Similarly, a “Caution Obstacle; Caution Obstacle” or “Obstacle
Ahead; Obstacle Ahead” alert is also provided.
190-00356-30 Rev F
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