Changes

'''Altitude''' is the measurement of the height of something relative to the sea level and/or the seabed itself. It is vital to have an altitude measuring instrument in flying machines such as [[airplane]]s and [[helicopter]]s, for the pilots to be sure they avoid coming dangerously close to the ground and/or other terrain.

'''Altitude''' is the measurement of the [[height]] of something relative to the [[sea]] level and/or the seabed itself. It is vital to have an altitude measuring instrument in flying machines such as [[airplane]]s and [[helicopter]]s, for the pilots to be sure they avoid coming dangerously close to the ground and/or other terrain.

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[[category:Aviation]]

[[category:Aviation]]