Garmin GPS Receiver 400/500 User Manual download pdf (Page 58)

Section 2

TAWS Operation

TAWS Symbols

The symbols depicted in Figure 2-6 are used to represent obstacles and potential impact points on the

TAWS Page. Note that obstacle symbols are shown on display zoom ranges up to 10 nm.

Color Interpretation

Garmin TAWS uses black, yellow, and red to depict terrain information relative to aircraft altitude

(Figure 2-7). Each color is associated with an alert severity level and a suggested course of action. Color

assignments are used by terrain graphics, obstacle symbols, and visual annunciations.

Color TERRAIN/Obstacle Loca-

tion

Alert Level Suggested Aircrew Response

Red TERRAIN/Obstacle is within 100’ or

above aircraft altitude.

WARNING Initiate climb and/or turn away from

terrain/obstacle.

Yellow TERRAIN/Obstacle is within 1000’

of aircraft altitude.

CAUTION Be aware of surroundings.

Be prepared to take action.

Black TERRAIN/Obstacle is more than

1000’ below aircraft altitude.

NO DANGER No action required.

Table 2-1: TAWS Color Symbology

Potential Impact Point

Unlighted Obstacle

Projected Flight Path

1000' AGL

100' Threshold

Figure 2-7: Terrain Altitude/Color Correlation

Unlighted Obstacles

<1000’ AGL

Lighted Obstacles

<1000’ AGL

Unlighted Obstacles

>1000’ AGL

Lighted Obstacles

>1000’ AGL

Potential Impact Points

Figure 2-6: TAWS Symbols

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Garmin GPS Receiver 400/500 User Manual Page 58