IFD500 Series Pilot Guide
7-20 General
Position updated using dead reckoning
The system will use the last known position and
groundspeed (and heading if available) to estimate the
aircraft position following loss of GPS for up to 5 minutes.
Since Dead Reckoning assumes no directional or
groundspeed change, it will not be reliable even during
those first 5 minutes if either or both of these factors have
changed.
Use bottom LSK on FPL tab before A/P
APR
Applicable only when GPS Select is set to “Prompt” in
Maintenance Mode. Indicates that the FMS is ready to
provide approach guidance for the autopilot. The proper
action is to press the “Enable A/P Approach” LSK on the
FPL page, then put the autopilot into approach mode.
The hold is armed for exit and is set to sequence upon
crossing the hold fix.
Exiting Hold At Intercept
The active HF leg (hold in lieu of procedure turn) is armed
for exit and set to sequence at the completion of the
inbound turn.
Disabled in Setup Options
FLTA has been turned off via the Setup page or via external
TERR INHB discrete input.
Exiting Hold
At Intercept
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