Negative Climb Rate After Take-Off Alert (Ncr) - Garmin GTN 625 Pilot's Manual

10.3.8.5

Negative Climb Rate After Take-Off Alert (NCR)

The Negative Climb Rate (NCR) After Take-Off alert (also referred to as
"Altitude Loss After Take-Off") provides alerts when the system determines 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. NCR alerting is only active when departing
from an airport and when the following conditions are met:
• Height above the terrain is less than 700 feet
• Distance from the departure airport is 2 NM or less
• Heading change from the departure heading is less than 110º
The NCR alerting parameters as defined by TSO-C151b are shown below.
Figure 10-14 Negative Climb Rate (NCR) Alert Criteria
190-01004-03 Rev. B Garmin GTN 625/635/650 Pilot's Guide
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