Can anyone tell me what vertical and lateral dimensions are around an airfield the egpws recognises as being the airfield environment...... eg would it trigger a terrain warning if the a/c was 1nm ofset from the FAT at say 2nm.
Am I also right in saying that the system terrain database can only be updated by the manufacturer/specialist tech and than it's not a simple matter of slotting in a new card/laptop update like FMS ?
Thanks for the sensible replies.