Private Pilot Private Exam

What is absolute altitude?

1. The vertical distance of the aircraft above the surface

2. The altitude stated on the altimeter

3. The height above the mean sea level

4. The pressure altitude used in navigation

The correct answer is: The vertical distance of the aircraft above the surface

Absolute altitude refers to the vertical distance of an aircraft above the surface of the Earth directly beneath it. This measurement indicates how high the aircraft is flying relative to the terrain or ground immediate below, which can be crucial during approaches, landings, and for avoiding obstacles. It differs from other altitude measures such as pressure altitude or indicated altitude, which are referenced to standard atmospheric conditions or sea level. Understanding absolute altitude is essential for pilots, especially in various flight scenarios where terrain awareness is critical. For instance, it helps in maintaining safe distances from the ground, particularly when flying over mountainous terrain or in areas where obstacles may be present.