Originally Posted by
gravity32
Some pilots have been telling me that the altimeter is more accurate than radalt. I am looking for Boeing's data to refute them.
Its a meaningless statement so other than by logic its not refutable.
Radalt measures distance to an object giving a radar return.
Altimeter uses pressure data to infer height above a reference datum.
You really can't compare the two. they aren't even really measuring the same thing. Depending on what you actually want to know, either may be better/"more accurate".