Obstacle Database Areas Of Coverage; Section 3: Htaws Alerts - Garmin GNC 420AW Pilot's Manual

Part Four: Section 3
HTAWS Alerts

Obstacle Database Areas of Coverage

The following describes the area of coverage avail-
able in each database. Regional definitions may change
without notice.
Database
Limited to the United States plus
United States (US) some areas of Canada, Mexico,
Caribbean, and the Pacific.
Alaska, Austria, Belgium, Canada*,
Caribbean*, Czech Republic,
Denmark, Estonia, Finland, France,
Germany, Greece, Hawaii, Iceland,
US/Europe Ireland, Italy, Latvia, Lithuania,
Mexico*, Netherlands, Norway,
Poland, Portugal, Slovakia, Spain,
Sweden, Switzerland, United
Kingdom, United States
* Indicates partial coverage
NOTE: It is very important to note that not all obstacles
are necessarily charted and therefore may not be con-
tained in the Obstacle Database.
54
Coverage Area
190-00356-30 Rev H

Section 3: HTAWS Alerts

Alerts are issued when flight conditions meet
parameters that are set within HTAWS software
algorithms. HTAWS alerts employ either a CAUTION
or a WARNING alert severity level. 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.
HTAWS Annunciation Field
HTAWS Annunciation Field
Annunciations are color-coded according to the
HTAWS Alert Summary table. Pop-up terrain alerts will
occur if an HTAWS alert is activated while not on the
HTAWS page. 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 HTAWS Page:
Press the ENT button.
NOTE: To further capture the attention of the pilot,
HTAWS issues aural (voice) messages that accom-
pany visual annunciations and pop-up alerts. Some
aural messages are configurable during installation of
the system. For a summary of aural messages, see the
HTAWS Alert Summary table.