Garmin Flight Deck 100 Manual

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Embraer Prodigy

Flight Deck 100 Pilot’s Guide

190-00728-04 Rev. A

398

HAZARD AVOIDANCE

FORWARD LOOKING TERRAIN AVOIDANCE

TheForwardLookingTerrainAvoidancefeatureofTAWS-Acomparestheaircraft’sprojectedightpathwith

known terrain and obstacles in their respective databases and issues four types of alerts as either a caution or

awarning:

Reduced Required Terrain Clearance (RTC) and Reduced Required Obstacle Clearance (ROC)

alerts are issued when the aircraft ﬂight path is above terrain, yet is projected to come within the minimum

clearancevaluesinFigure6-91.WhenanRTCalertisissued,apotentialimpactpointisdisplayedonthe

TAWS-APage.

Imminent Terrain Impact (ITI) and Imminent Obstacle Impact (IOI) alerts are issued when the

aircraftisbelowtheelevationofaterrainorobstaclecellintheaircraft’sprojectedpath.ITIandIOIalerts

areaccompaniedbyapotentialimpactpointdisplayedontheTAWS-APage.Thealertisannunciatedwhen

theprojectedverticalightpathiscalculatedtocomewithinminimumclearancealtitudesinFigure6-91.

Required Terrain Clearance

100

200

300

400

500

600

700

800

0 5 10 15 20 25 30

Distance From Runway (NM)

Required Terrain Clearance (FT)

RTC Level (FT) RTC Descending (FT)

Figure 6-91 FLTA Alert Minimum Terrain and Obstacle Clearance Values

Distance From Runway (NM)

Required Terrain Clearance (FT)

FLTAalertsareautomaticallyinhibitedwhentheaircraftislessthan200feetabovethedestinationrunway

elevationwhilewithin0.5nmoftheapproachrunwayortheaircraftisbetweenrunwayends.