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Part Four: Section 2
HTAWS Operation
To display the HTAWS Page, select the NAV group
and turn the
small right
knob until the HTAWS
Page is displayed. Terrain information, aircraft ground
track, and GPS-derived MSL altitude are displayed
on the page. Altitude is shown in increments of 20
feet or in increments of 10 meters, depending on unit
configuration. The “G” to right of the MSL altitude
display reminds the pilot that altitude is GPS-derived.
Page Menu
The HTAWS page menu provides options to
acknowledge caution alerts, reduce protection, or
inhibit alerting. The acknowledge caution alert
functionality suppresses the issuance of caution
aural messages, while still displaying the visual
annunciations, but allows warnings to remain
annunciated both visually and aurally.
The HTAWS Page has two selectable view settings:
120
˚
Viewing Angle on the HTAWS Page
• 360˚ View—View from above aircraft depicting
surrounding terrain on all sides.
• 120˚ View—View of terrain ahead of and 60˚ to
either side of the aircraft flight path.
NOTE:
The HTAWS Page gives a “Track Up” display
orientation, as indicated by the “TRK” label shown on
the display. This is the only orientation available for the
HTAWS Page.
To display 120˚ or 360˚ view:
1. Select the HTAWS Page and press
MENU
. Select
“View 120˚?” or “View 360˚?”.
2. Press
ENT
. The HTAWS Page displays the
selected view. Repeat step 1 to select the
alternate view, and press
ENT
.
Seven display ranges are available, allowing for a
more complete view of the surrounding area.
To change the display range:
1. Select the HTAWS Page and press up or down
on the
RNG
key to select the desired range:
1 NM, 2 NM, 5 NM, 10 NM, 25 NM, 50 NM,
100 NM.
Aviation information such as airports, VORs, and
other navaids can be turned on or off on the HTAWS
Page.
To show or hide aviation information:
1. Press
MENU
.
2. Select “Show (or Hide) Aviation Data?” and
press
ENT
. Pressing the
CLR
key when the
HTAWS Page is displayed can also be used to
toggle aviation information on or off.
Aviation Data
190-00356-30 Rev H