My wristwatch has an altimeter, which as a backpacker, I find very useful.
my American friend Keith Giles has one which includes an altimeter
ive been looking for this answer for ages
Most altimeters use changes in atmospheric pressure to determine altitude. The altimeter is a crucial tool in air traffic control.
My handheld GPS instrument has a barometric altimeter in it also.
what are all the instruments use to measure altitude
The main difference between altimeter and cabin altimeter is the place where they take their pressure: Altimeter takes the pressure from static ports, while cabin altimeter takes it's pressure from the cabin.
There isn't one because it is a noun
to measure their altitude
true altitude at field elevation.
My GPS instrument contains a barometric altimeter.
The pilot checked the altimeter to be sure the plane had reached the optimum altitude before the skydivers were allowed to jump. Most altimeters have to be set to local air pressure to correctly determine the plane's height above the ground.
An altimeter is an altitude measuring device (alti + meter).