Wiktionary
absolute altimeter
n. (context aviation English) A type of altimeter which measures vertical distance to the surface below, using radio, radar, sonic, laser, or capacitive technology.
Usage examples of "absolute altimeter".
The chap working the absolute altimeter steadily fed his data into the fuse pots of the canister.
The chap working the absolute altimeter stea ily fed his data into the fuse pots of the canister.