AeroNav 900/880 Series Pilot’s Guide
89000039-010
Rev 1 May 2019
SVS Subsystem
2-13
SVS FORWARD LOOKING TERRAIN ALERTING (FLTA)
FLTA alerting is triggered by either a projected imminent impact
with terrain or obstacle or reduced terrain and obstacle clearance.
Projected imminent impact with terrain occurs when the TVV/FPM
is projected to intersect with terrain up to 3.0nm (yellow caution)
or up to 1.5nm (red warning) in front of the aircraft flight path. By
way of reference, this means an aircraft traveling at 180 knots of
ground speed will have 60 seconds of notice for a caution and 30
seconds for a warning. Reduced terrain or obstacle clearance
occurs when the TVV/FPM is not projected to impact the terrain
but the projected clearance between the aircraft flight path and
nearby terrain or obstacles falls below a designated safe vertical
distance.
The projected imminent impact location or the projected reduced
terrain and obstacle clearance area is depicted on the SynVis
scene and the maps with a solid yellow (caution) or red (warning)
“flashlight” elliptical depiction. Depending on aircraft dynamics, it
may be possible for a solid red FLTA “flashlight” projected terrain
impact point to appear on top of a larger hatched yellow SV-TA
depiction.
SVS with Active FLTA Alerts
Summary of Contents for AeroNav 880
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