Garmin GPS 400 Pilot's Manual And Reference page 4

INTRODUCTION
Cautions
NOTE: This device complies with Part 15 of the
FCC limits for Class B digital devices. This equip-
ment generates, uses, and can radiate radio fre-
quency energy and, if not installed and used in
accordance with the instructions, may cause harm-
ful interference to radio communications.
Furthermore, there is no guarantee that interfer-
ence will not occur in a particular installation.
If this equipment does cause harmful interfer-
ence, the user is encouraged to try to correct the
interference by relocating the equipment or connect-
ing the equipment to a different circuit than the
affected equipment. Consult an authorized dealer or
other qualified avionics technician for additional help
if these remedies do not correct the problem.
Operation of this device is subject to the follow-
ing conditions: (1) This device may not cause harm-
ful interference, and (2) this device must accept
any interference received, including interference
that may cause undesired operation.
The GARMIN GPS 400 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 Part 15 regulations.
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 the GARMIN GPS 400 is a precision electronic NAVigation AID
(NAVAID), any NAVAID can be misused or misinterpreted and therefore become
unsafe.
Use the GPS 400 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 GPS 400 to all available
navigation sources, including the information from other NAVAIDS, visual sightings,
charts, etc. For safety, always resolve any discrepancies before continuing navigation.
The altitude calculated by the GPS 400 is geometric height above mean sea level
and could vary significantly from altitude displayed by pressure altimeters in aircraft.
GPS accuracy may be degraded by the U.S. Department of Defense imposed
Selective Availability (SA) program. With "SA" on, GPS altitude may be in error by
several hundred feet. Never use GPS altitude for vertical navigation.
The Jeppesen database incorporated in the GPS 400 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 GPS 400 package.
Pilots using an out-of-date database do so entirely at their own risk.