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1. Model Descriptions

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 the Garmin 400W-series are precision

electronic NAVigation 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 Supple-

ment, 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

information from other NAVAIDS, visual sightings, charts, etc.

For safety, always resolve any discrepancies before continuing

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 Pilots using an out-of-date database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 decod-

ing 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.

WARNING: VNAV is to be used for advisory purposes only.

VNAV messages or vertical speed required should not be

used to maintain terrain or ATC clearances. Terrain and ATC

clearances are the sole responsibility of the pilot.

CAUTIONS

CAUTION: The electronic chart is an aid to navigation 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 posi-

tional accuracy of the land and water data is not of a preci-

sion 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 incompatible

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 be-

ing 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 ap-

proach guidance in accordance with published procedure. The

unit may not provide correct guidance until established on a

defined leg.

NOTE: GPS level of service annunciations (LPV, ENR, etc.)

are not applicable to the external CDI (or HSI) when VLOC is

active.

190-00356-01 Rev F