10-21
190-01004-03 Rev. P
GTN 625/635/650 Pilot’s Guide
Terrain
10.6 TAWS-B (Optional)
TAWS (Terrain Awareness and Warning System) is an optional feature to
increase situational awareness and aid in reducing controlled flight into terrain
(CFIT). TAWS provides visual and aural annunciations when terrain and
obstacles are within the given altitude threshold from the aircraft.
TAWS satisfies TSO-C151c Class B requirements for certification. Class B
TAWS is required for all Part 91 turbine aircraft operations with six or more
passenger seats and for Part 135 turbine aircraft operations with six to nine
passenger seats (FAR Parts 91.223, 135.154).
10.6.1 TAWS-B Requirements
• A valid terrain/obstacle database
• A valid 3-D GPS position solution
10.6.2 TAWS-B Limitations
NOTE:
The data contained in the TAWS databases comes from government
agencies. Garmin accurately processes and cross-validates the data but
cannot guarantee its accuracy or completeness.
TAWS displays terrain and obstructions relative to the altitude of the aircraft.
Compliance with TAWS B alerts and warnings is MANDATORY. When a TAWS
B "pull up" annunciation is issued, the pilot is required to pull up.
TAWS uses terrain and obstacle information supplied by government sources.
Terrain information is based on terrain elevation information in a database that
may contain inaccuracies. Individual obstructions may be shown if available in
the database. The data undergoes verification by Garmin to confirm accuracy of
the content, per TSO-C151c.
Summary of Contents for GTN 625
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