What altitude value is associated with the Radio Altimeter?

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Multiple Choice

What altitude value is associated with the Radio Altimeter?

Explanation:
The radio altimeter directly measures height above the ground, so its altitude value is always expressed in feet AGL (above ground level), not above mean sea level. This is why a readout like 2500 ft AGL is the appropriate way to represent the radio altimeter height. The other items don’t relate to altitude above the terrain: one is a parameter of engine or pneumatic systems (speed of high pressure spool), another is a navigation aid (VOR), and the last is unrelated hardware (a harness count).

The radio altimeter directly measures height above the ground, so its altitude value is always expressed in feet AGL (above ground level), not above mean sea level. This is why a readout like 2500 ft AGL is the appropriate way to represent the radio altimeter height. The other items don’t relate to altitude above the terrain: one is a parameter of engine or pneumatic systems (speed of high pressure spool), another is a navigation aid (VOR), and the last is unrelated hardware (a harness count).

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