Terrain Limitations; Terrain Awareness And Warning System (Taws-B) Optional; Taws-B Requirements - Garmin GTN 625 Pilot's Manual

10.2.2

Terrain Limitations

Terrain Proximity displays terrain and obstructions relative to the altitude of the
aircraft. The displayed alerts are advisory in nature only. Individual obstructions
may be shown if available in the database. However, all obstructions may not
be available in the database and data may be inaccurate. Terrain information
should be used as an aid to situational awareness. Never use this information for
navigation or to maneuver to avoid obstacles.
Terrain Proximity uses terrain and obstacle information supplied by
government sources. The displayed information should never be understood as
being all-inclusive.
NOTE: The data contained in the Terrain Proximity databases comes from
government agencies. Garmin accurately processes and cross-validates the
data but cannot guarantee the accuracy and completeness of the data.
NOTE: TERRAIN, TAWS-A, TAWS-B, HTAWS, or HTERRAIN PROXIMITY
functionality will be available via the Terrain page, depending on the
installed hardware and configuration. HTAWS or HTERRAIN PROXIMITY
are available in software version 4.00, or later. TAWS-A is available in
software version 5.00, or later.
10.3 Terrain Awareness and Warning System
(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).
10.3.1

TAWS-B Requirements

TAWS requires the following to operate properly:
• A valid terrain/obstacle database
• A valid 3-D GPS position solution
190-01004-03 Rev. F Garmin GTN 625/635/650 Pilot's Guide
Foreword
Getting
Started
Xpdr Ctrl
Com/Nav
FPL
Direct-To
Proc
Wpt Info
Map
Traffic
Terrain
Weather
Nearest
Services/
Music
Utilities
System
Messages
Symbols
Appendix
Index
10-5