Altimeter; It allows the height of aircraft to be measured in feet above sea level.

The altimeter, which is used in aviation and mountaineering, was invented in 1928. It has undergone many changes until today.
WHAT IS ALTIMETER
An altimeter is a device that measures altitude relative to a fixed level. This constant level is generally considered to be sea level.
ALTIMETER TYPES
There are three types of altimeters in common use today. These can be listed as follows:
- Barometric altimeter
- radio altimeters
- Optical altimeters