Garmin GNC 420W Pilot's Manual Addendum

Also see for GDL 69: Pilot's guide addendum Pilot's guide addendum Activation Instructions Pilot's guide Activation Instructions

Contents

Garmin GNC 420W Pilot's Manual Addendum Manual pdf 44 page image

40Part Three: Section 3TAWS AlertsWARNING—The annunciation and pop-up terrainalert are accompanied by the aural message “PullUp”.Negative Climb Rate After Takeoff Alert (NCR)The purpose of the Negative Climb Rate AfterTakeoff alert (also referred to as “Altitude Loss AfterTakeoff”) is to provide suitable alerts to the pilotwhen the system determines that the aircraft is losingaltitude (closing upon terrain) after takeoff. Theaural message “Don’t Sink” is given for NCR alerts,accompanied by an annunciation and a pop-up terrainalert on the display.The “Don’t Sink” pop-up terrain alert accompanies the auralmessage 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 anairport and when the following conditions are met:• The height above the terrain is less than 700feet• The distance from the departure airport is 2 NMor less• The heading change from the heading at thetime of departure is less than 110 degreesThe NCR alerting parameters as defined by TSO-C151b are shown in the Negative Climb Rate graph.Altitude Loss (feet)Height Above Terrain (Feet)0020 40 60 80 100 120 1402004006008001000"DON'T SINK"Negative Climb Rate (NCR) Graph