from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An instrument for determining elevation, especially an aneroid barometer used in aircraft that senses pressure changes accompanying changes in altitude.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An apparatus for measuring altitude.
from the GNU version of the Collaborative International Dictionary of English
- n. An instrument for taking altitudes, as a quadrant, sextant, etc.
from The Century Dictionary and Cyclopedia
- n. An instrument for measuring altitudes, as a quadrant, sextant, or theodolite.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. an instrument that measures the height above ground; used in navigation
An altimeter measures the distance from the satellite, where the altimeter is placed, to the surface of the Earth.
The Service Release limits operations involved in these activities to: no prolonged flights over water; no flights with sand filters fitted; no night flights using night vision devices; no flights where the radar altimeter is to be relied upon, and; no take-off, landing or operations close to the ground above 5000 foot pressure altitude.
A standard altimeter could not tell the astronauts when they reached their perilune because an altimeter was an instrument that determined altitude based on changes in atmospheric pressure and the Moon has no atmosphere.
So we teach a very unique course called altimeter navigation, and when the soldier learns to figure out exactly where he is on that line of advance by comparing the altimeter to the contoural lines on the map, very precise, and also very helpful for weather prediction.
They were landing on runway 21 and the altimeter was the same.
The TS3 also includes a compass, altimeter and barometer, which may be helpful for hiking or tracking hurricanes.
In order for a bomb like this to go off in mid-flight, considering it was in cargo, it would have had to have some kind of automatic detonator built into it, like an altimeter switch that would set it off at a certain altitude or a timer.
I like the Casio Triple Sensor watch, with compass, altimeter and barometer/thermometer.
Subject further spoke of making HALO jumps using an altimeter and popping his chute at 1000 feet.
Switchback after switchback (50-some in all) winds you upward from the muffled roar of the creek bottom ( "here bear, coming through Mr. Bear!") to an eventual alpine plateau where the altimeter strikes 10 grand.