Garmin SOCATA TBM850, Pilot'S Manual

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190-00709-04 Rev. A
Garmin G1000 Pilot’s Guide for the Socata TBM 850
409
HAZARD AVOIDANCE
6.6 TERRAIN-SVS
WARNING:
Do not use Terrain-SVS information for primary terrain avoidance. Terrain-SVS is intended only
to enhance situational awareness.
NOTE:
Terrain data is not displayed if the aircraft is outside of the terrain database coverage area.
NOTE:
Terrain-SVS is standard when the Synthetic Vision System (SVS) option is installed. The TAWS-B
option will take precedence over the Terrain-SVS and Terrain Proximity features.
G1000 Terrain-SVS is a terrain awareness system available with the Synthetic Vision System (SVS). SVS
functionality is offered as an optional enhancement. Optional Terrain Awareness and Warning System - Class B
(TAWS-B) or standard Terrain-SVS is integrated within SVS to provide visual and auditory alerts to indicate the
presence of threatening terrain relevant to the projected flight path. For detailed information regarding SVS, refer
to the Synthetic Vision System (SVS) section of the G1000 Pilot’s Guide.
Terrain-SVS does not comply with TSO-C151b certification standards. It increases situational awareness and
aids in reducing controlled flight into terrain (CFIT). Do not confuse Terrain-SVS with Terrain Awareness and
Warning System (TAWS). TAWS is more sophisticated and robust, and it is TSO-C151b certified. Although the
terrain and obstacle color map displays are the same, TAWS uses more sophisticated algorithms to assess aircraft
distance from terrain and obstacles.
Terrain-SVS does not provide the following:
• Premature Descent Alerting (PDA)
• Excessive Descent Rate (EDR)
• Negative Climb Rate (NCR)
• Descent to 500 Feet Callout (DFC)
Terrain-SVS requires the following components to operate properly:
• Valid 3-D GPS position
• Valid terrain/obstacle database
Terrain-SVS displays altitudes of terrain and obstructions relative to the aircraft position and altitude with
reference to a database that may contain inaccuracies. Terrain and obstructions are shown only if they are in the
database. Terrain and obstacle information should be used as an aid to situational awareness. They should never
be used to navigate or maneuver around terrain.
Note that all obstructions may not be available in the terrain and obstacle database. No terrain and obstacle
information is shown without a valid 3-D GPS position.
The G1000 GPS receiver provides the horizontal position and altitude. GPS altitude is derived from satellite
position. GPS altitude is then converted to the height above geodetic sea level (GSL), which is the height above
mean sea level calculated geometrically. GSL altitude is used to determine terrain and obstacle proximity. GSL
altitude accuracy is affected by satellite geometry, but is not subject to variations in pressure and temperature that
normally affect pressure altitude sensors. GSL altitude does not require local altimeter settings to determine MSL
altitude. It is a widely-used MSL altitude source.