My 2 cents worth....Try using the damm thing in my neck of the woods and you might change your ideas on GPS reliability. We fly GPS NPA into a field with no other aids and have failures on a regular basis, lucky for me the other side kept working, but we do have times when both sides fail, luckily in VMC though. But still my company insists that it's nothing to be worried about, especially the high terrain ....which they say is depicted on the EHSI via the TAAD of EGPWS, .....I guess not. God knows how we got approved to do the approach?
