Garmin GPS 500W Pilot's Manual Addendum - Page 44

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Part Three: Section 3

TAWS Alerts

WARNING—The annunciation and pop-up terrain

alert are accompanied by the aural message "Pull

Negative Climb Rate After Takeoff Alert (NCR)

The purpose of the Negative Climb Rate After

Takeoff alert (also referred to as "Altitude Loss After

Takeoff") is to provide suitable alerts to the pilot

when the system determines that the aircraft is losing

altitude (closing upon terrain) after takeoff. The

aural message "Don't Sink" is given for NCR alerts,

accompanied by an annunciation and a pop-up terrain

alert on the display.

1000

800

600

400

200

Up".

Altitude Loss (feet)

Negative Climb Rate (NCR) Graph

The "Don't Sink" pop-up terrain alert accompanies the aural

message for the NCR alert. The aural message "Don't Sink" or

"Too low, terrain" is issued also.

NCR alerting is only active when departing from an

airport and when the following conditions are met:

• The height above the terrain is less than 700

feet

• The distance from the departure airport is 2 NM

or less

• The heading change from the heading at the

time of departure is less than 110 degrees

The NCR alerting parameters as deﬁned by TSO-

C151b are shown in the Negative Climb Rate graph.

"DON'T SINK"

100

120

140