last two posts ...
good points raised.
possible database "latitude for error" especially so (A van).
The implication is that whilst we put trust in the system performance day in day out, if there are accuracy disclaimers in mountainous regions (and lets not beat about the bush .. this is the last hole in the cheese model) it's a point worth examining and bringing our collective experience of TAWS to the table.
My own is that pre-TAWS (basic GPWS) I had one hard warning due to an ATC slip-up .. post enhanced GPWS/TAWS .. no incident or observed false warning ... but others have a contribution to make in the light of experience, and more system related in depth knowledge perhaps ?