flight instrumentsFAA-published question bank (Private Pilot, 2008)
What is true altitude?
A
The vertical distance of the aircraft above sea level.✓ Correct Answer
B
The vertical distance of the aircraft above the surface.
C
The height above the standard datum plane.
Explanation
PHAK defines true altitude as the vertical distance of the aircraft above sea level. Height above the surface is absolute altitude, and height above the standard datum plane is pressure altitude.
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