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INTRODUCTION
Warnings and Cautions
W
ARNING: Terrain data is obtained from third party sources. Garmin is not able to independently
verify the accuracy of this data which should be used only as an aid for situational awareness. Ter-
rain data must not be used as the sole basis for decisions or maneuvers to avoid terrain or obstacles.
Terrain data must not be used for navigation.
CAUTION: Use the 400/500 Series Units at your own risk. To reduce the risk of unsafe operation,
carefully review and understand all aspects of the Owner’s Manual and the Flight Manual Sup-
plement, and thoroughly practice basic operation prior to actual use.
CAUTION: The Global Positioning System is operated by the United States government, which is
solely responsible for its accuracy and maintenance. The system is subject to changes which could
affect the accuracy and performance of all GPS equipment. Although Garmin 400/500 Series Units
are precision electronic NAVigation AIDS (NAVAID), any NAVAID can be misused or
misinterpreted and therefore become unsafe.
CAUTION: Use the Weather Data Link Interface, TIS, TAWS, and TERRAIN at your own risk. To reduce
the risk of unsafe operation, thoroughly practice basic operation prior to actual use. When in actual
use, carefully compare indications from the Garmin unit to all available navigation sources, including
the information from other NAVAIDS, visual sightings, charts, etc. For safety, always resolve any dis-
crepancies before continuing navigation. The GPS altitude format calculated by the Garmin 400/500
Series units is geometric height above mean sea level and could vary significantly from altitude
displayed by pressure altimeters in aircraft. Never use GPS altitude for vertical navigation.
CAUTION: The Jeppesen database incorporated in the Garmin 400/500 Series Units must be updated
regularly in order to ensure that its information is current. Updates are released every 28 days. A
database information packet is included in your Garmin 400/500 Series Unit package. Pilots using
an out-of-date database do so entirely at their own risk.
CAUTION: The Weather Data Link, TIS, TAWS, and TERRAIN information contained in this Pilot’s Guide
Addendum is not intended to replace the documentation that is supplied with the applicable Garmin
400/500 Series Unit and the GTX 330 Transponder. The user must know how to operate the 400/500
Series Unit and be knowledgeable of the information in the 400/500 Pilot’s Guide.
TIS CAUTION:
TIS is NOT intended to be used as a collision
avoidance system and does not relieve the
pilot responsibility to “see and avoid” other
aircraft. TIS should not be used for avoid-
ance maneuvers during IMC or other times
when there is no visual contact with the
intruder aircraft. TIS is intended only to
assist in visual acquisition of other aircraft
in VMC.
Avoidance maneuvers are not
recommended, nor authorized, as a
direct result of a TIS intruder display or
TIS alert.
While TIS is a useful aid to visual traffic
avoidance, it has some system limitations that
must be fully understood to ensure proper
use. Many of these limitations are inherent
in secondary radar surveillance. In other
words, the information provided by TIS will
be no better than that provided to ATC.
