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Part Three:

TAWS Interface

Section 1: Introduction

NOTE: GNS 530W units may display a TERRAIN

Page, a TAWS Page, or neither, (but not both)

depending upon the installed hardware and

configuration.

Overview

Garmin' s Terrain Awareness Warning System

(TAWS) is an optional feature (500W-series only) to

increase situational awareness and aid in reducing

controlled flight into terrain. Garmin TAWS satisfies

TSO-C151b Class B requirements for certification.

Class B TAWS is required for all Part 91 aircraft

operations with six or more passenger seats and for

Part 135 turbine aircraft operations with six to nine

passenger seats (FAR Parts 91.223, 135.154).

TAWS provides visual and aural annunciations

when terrain and obstacles are within the given altitude

threshold from the aircraft.

Garmin TAWS satisfies TSO-C151b Class B

requirements for certification

Operating Criteria

Garmin TAWS requires the following to operate

properly:

• The system must have a valid 3D GPS position

solution

• The system must have a valid terrain/obstacle/

airport terrain database

Limitations

NOTE: The data contained in the TAWS databases

comes from government agencies. Garmin accurately

processes and cross-validates the data, but cannot

guarantee the accuracy and completeness of the data.

TAWS displays terrain and obstructions relative

to the altitude of the aircraft. The displayed alerts

and warnings are advisory in nature only. Individual

obstructions may be shown if available in the database.

However, all obstructions may not be available in the

database and data may be inaccurate. Never use this

information for navigation or to maneuver to avoid

obstacles.

Terrain information is based on terrain elevation

data contained in a database that may contain

inaccuracies. Terrain information should be used

as an aid to situational awareness. Never use it for

navigation or to maneuver to avoid terrain.

TAWS uses terrain and obstacle information sup-

plied by government sources. The data undergoes veri-

fication by Garmin to confirm accuracy of the content,

per TSO-C151b. However, the displayed information

should never be understood as being all-inclusive.

190-00356-30 Rev C

Part Three: Section 1

TAWS Introduction