Quote:
Originally Posted by speeder
I know very little about aviation but even in the absence of the fancy "terrain avoidance" feature that it did not have, doesn't every aircraft have a simple gauge that tells you how far from earth you are? As in, how high above ground? 
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Altimeter, yes. Gives you height above sea level, more or less.
Height above terrain, no, not on all aircraft. That requires a radar altimeter. Don't know if that helicopter had one.
I think the biggest question might be whether or not the pilot had a good scan of the instruments going.