Garmin GTN 725 Cockpit Reference Manual page 2

WARNING: Navigation and terrain separation must NOT be predicated
upon the use of the terrain function. The GTN 725/750 Terrain Proximity
and HTerrain Proximity features are NOT intended to be used as a primary
reference for terrain avoidance and does not relieve the pilot from the
responsibility of being aware of surroundings during flight. The Terrain
Proximity feature is only to be used as an aid for terrain avoidance and is
not certified for use in applications requiring a certified terrain awareness
system. Terrain data is obtained from third party sources. Garmin is not
able to independently verify the accuracy of the terrain data.
WARNING: The displayed minimum safe altitudes (MSAs) are only
advisory in nature and should not be relied upon as the sole source
of obstacle and terrain avoidance information. Always refer to current
aeronautical charts for appropriate minimum clearance altitudes.
WARNING: The Garmin GTN 725/750 has a very high degree of functional
integrity. However, the pilot must recognize that providing monitoring
and/or self-test capability for all conceivable system failures is not
practical. Although unlikely, it may be possible for erroneous operation
to occur without a fault indication shown by the GTN 725/750. It is thus
the responsibility of the pilot to detect such an occurrence by means of
cross-checking with all redundant or correlated information available in
the cockpit.
WARNING: The altitude calculated by GPS receivers is geometric height
above Mean Sea Level and could vary significantly from the altitude
displayed by pressure altimeters, such as the output from the GDC 74A/B
Air Data Computer, or other altimeters in aircraft. GPS altitude should
never be used for vertical navigation. Always use pressure altitude
displayed by pressure altimeters in the aircraft.
WARNING: Do not use outdated database information. Databases used
in the GTN 725/750 system must be updated regularly in order to ensure
that the information remains current. Pilots using an outdated database
do so entirely at their own risk.
WARNING: Do not use basemap (land and water data) information for
primary navigation. Basemap data is intended only to supplement other
approved navigation data sources and should be considered as an aid
to enhance situational awareness.
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GTN 725/750 Cockpit Reference Guide (CRG) 190-01007-04 Rev. D