What is true height?
(a) The vertical geometrical distance between an object and a datum level
(b) The vertical geometrical distance between a certain height and a datum level
(c) The horizontal geometrical distance between an object and a datum level
(d) The horizontal geometrical distance between a certain height and a datum level
The question was asked during an online exam.
I would like to ask this question from Standard Atmospheric Model in chapter Atmosphere and Air Data Measurement of Aircraft Performance