Garmin GPS 400W Pilot's Manual & Reference page 3

Cautions
CAUTION: The Global Positioning System is operated
by the United States government, which is solely re-
sponsible for its accuracy and maintenance. The system
is subject to changes which could affect the accuracy
and performance of all GPS equipment. Although the
Garmin 400W-series are precision electronic NAViga-
tion AIDs (NAVAID), any NAVAID can be misused or
misinterpreted and therefore become unsafe.
CAUTION: Use the 400W-series at your own risk. To
reduce the risk of unsafe operation, carefully review
and understand all aspects of this Owner's Manual and
the Flight Manual Supplement, and thoroughly practice
basic operation prior to actual use. When in actual use,
carefully compare indications from the 400W-series to
all available navigation sources, including the informa-
tion from other NAVAIDS, visual sightings, charts, etc. For
safety, always resolve any discrepancies before continu-
ing navigation.
WARNING: The altitude calculated by the 400W-series
is geometric height above mean sea level and could
vary significantly from altitude displayed by pressure
altimeters in aircraft.
WARNING: The Jeppesen database incorporated in
the 400W-series 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 400W-series package. Pilots using
an out-of-date database do so entirely at their own
risk!
CAUTION: GPS receivers operate by receiving and
decoding very low power radio signals broadcast by
satellites. It is possible that in some situations other
radio equipment or electronic equipment used in close
proximity to a GPS receiver may create electromagnetic
interference (EMI) which may affect the ability of the
GPS receiver to receive and decode the satellite signals.
In such event, the interference may be reduced or
eliminated by switching off the source of interference
or moving the GPS receiver away from it.
Introduction
CAUTION: The electronic chart is an aid to naviga-
tion and is designed to facilitate the use of authorized
government charts, not replace them. Land and water
data is provided only as a general reference to your
surroundings. The positional accuracy of the land and
water data is not of a precision suitable for use in
navigation and it should not be used for navigation.
Only official government charts and notices contain
all information needed for safe navigation – and, as
always, the user is responsible for their prudent use.
CAUTION: The Terrain feature is for supplemental
awareness only. The pilot/crew is responsible for all
terrain and obstacle avoidance using information not
provided by the 400W-series Terrain feature.
CAUTION: The Garmin 400W-series does not contain
any user-serviceable parts. Repairs should only
be made by an authorized Garmin service center.
Unauthorized repairs or modifications could void your
warranty and authority to operate this device under
FCC Part 15 regulations.
NOTE: The GNS 400W-series units use a different
database than in the legacy units. The databases are in-
compatible between units. The GNS 400W-series units
must use a WAAS enabled database.
NOTE: This product, its packaging, and its components
contain chemicals known to the State of California to
cause cancer, birth defects, or reproductive harm. This
notice is being provided in accordance with California's
Proposition 65. If you have any questions or would like
additional information, please refer to our website at
www.garmin.com/prop65.
NOTE: It is the pilot's responsibility for initial missed
approach guidance in accordance with published pro-
cedure. The unit may not provide correct guidance until
established on a defined leg.
190-00356-00 Rev B
INTRODUCTION
Cautions