AeroNav 900/880 Series Pilot’s Guide
89000039-010
4-40 Map Subsystem Rev 1 May 2019
PDA is suppressed during normal VFR operations in the airport area
and will only generate alerts in the following range and altitude
categories:
If a PDA alert has been triggered, a CAS message and aural alert
“Too Low Terrain” will be issued and repeat every 6 seconds until it is
acknowledged or the condition is no longer true. For the condition to
no longer be true, the aircraft must clear the alerting altitude by 100
feet. So, for example, if the aircraft is 4 NM away from the airport
and descended to 150 feet AGL, a climb to 250 feet AGL must be
completed to clear the condition.
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