Garmin Flight Deck 100 Marine Instruments User 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
0
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.
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