Warnings, Cautions, & Notes
WARNING: The altitude calculated by 4XX/5XX GPS receivers is geometric
height above Mean Sea Level and could vary significantly from the altitude
displayed by pressure altimeters in aircraft. GPS altitude should never be used
for vertical navigation. Always use pressure altitude displayed by pressure
altimeters in the aircraft.
WARNING: The Jeppesen database used in the 4XX/5XX system must be
updated regularly in order to ensure that its information remains current.
Updates are released every 28 days. A database information packet is included
in the 4XX/5XX package. Pilots using an outdated database do so entirely
at their own risk.
WARNING: The basemap (land and water data) must not be used for
navigation, but rather only for non-navigational situational awareness. Any
basemap indication should be compared with other navigation sources.
WARNING: For safety reasons, 4XX/5XX operational procedures must be
learned on the ground.
WARNING: The United States government operates the Global Positioning
System and is solely responsible for its accuracy and maintenance. The GPS
system is subject to changes which could affect the accuracy and performance
of all GPS equipment. Portions of the Garmin 4XX/5XX units utilize GPS as a
precision electronic NAVigation AID (NAVAID). Therefore, as with all NAVAIDs,
information presented by the 4XX/5XX units can be misused or misinterpreted
and, therefore, become unsafe.
WARNING: The GTS 8XX interface is intended for advisory use only to aid
the pilot in visually acquiring traffic. No avoidance maneuvers should be
based solely upon TAS or TCAS traffic information. It is the responsibility of
the pilot in command to see and manuever to avoid traffic.
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400/500 Pilot's Guide Addendum for GTS 8XX Interface
190-00140-78 Rev. A
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