Garmin gns 500w Manuale Utente

41

190-00356-00 Rev E

Terrain Operation

“Restore Defaults?” resets all four user-selectable

data fields to their original factory default settings. 

During power-up of the 400W Series unit, the

terrain/obstacle database versions are displayed along 
with a disclaimer. At the same time, the Terrain system 
self-test begins. A failure message is issued if the test fails. 

Garmin TERRAIN is a non-TSO-C151b-certified 

terrain awareness system provided as a standard feature 
of 400W-Series units to increase situational awareness 
and help reduce controlled flight into terrain (CFIT). 
Operating Criteria

TERRAIN requires the following to operate properly: 

•  The system must have a valid 3-D GPS position

solution. 

•  The system must have a valid terrain/obstacle/air-

port terrain database. 

TERRAIN 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 obstruc-
tions may not be available in the database and data may 
be inaccurate. Never use this information for navigation 
or to maneuver to avoid obstacles. 

Terrain  information  is  based  on  terrain  elevation 

information in a database that may contain inaccuracies.  
Terrain information should be used as an aid to situational 
awareness. Never use it for navigation or to maneuver to 
avoid terrain. 

TERRAIN  uses  terrain  and  obstacle  information 

supplied  by  government  sources.  The  data  undergoes 
verification by Garmin to confirm accuracy of the content, 
per  TSO-C151b.  However,  the  displayed  information 
should never be understood as being all-inclusive.