Garmin GPS 400W Addendum au manuel du pilote - Page 34
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Part Three: Section 2
TAWS Operation
lapse rates have fixed values), it is common for the
baro-corrected altitude (as read from the altimeter)
to differ from the GPS-MSL altitude. This variation
results in the aircraft' s true altitude differing from the
baro-corrected altitude.
Power Up
During power-up of the 500W Series unit, the
terrain/obstacle database versions are displayed along
with a disclaimer to the pilot. At the same time,
TAWS self-test begins. TAWS gives the following aural
messages upon test completion:
• "TAWS System Test, OK", if the system passes the test
• "TAWS System Failure", if the system fails the test
A test failure is also annunciated for TAWS, as
shown in the TAWS Alert Summary table.
TAWS Page
The TAWS Page is in the NAV group of pages (see
the 500W Series Pilot' s Guide for detailed information
regarding page groups and pages).
The TAWS Page
To display the TAWS Page, select the NAV group
and turn the small right knob until the TAWS Page
is displayed. Terrain information, aircraft ground
30
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.
The TAWS Page has two selectable view settings:
˚
120
Viewing Angle on the TAWS 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 TAWS 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
TAWS Page.
To display a 120˚ view:
1.
Select the TAWS Page and press MENU. Select
"View 120˚?".
Press ENT. The TAWS Page displays the 120˚
2.
view. To change to a 360˚ view, repeat step 1,
select "View 360˚?", and press ENT.
Seven display ranges are available, allowing for a
more complete view of the surrounding area.