RA refers to which type of altitude?

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Multiple Choice

RA refers to which type of altitude?

RA is the altitude measured by radio waves from the aircraft to the ground—the distance to the terrain below as determined by a radio (radio/ radar) altimeter. This height above ground is especially important during approach and low-altitude flight because it reflects height above terrain rather than above sea level. The term used for this measurement in aviation is radio altitude, which is why that option is the best choice. The other options imply a setting or use the radar terminology in a way that doesn’t describe the measurement itself.

RA is the altitude measured by radio waves from the aircraft to the ground—the distance to the terrain below as determined by a radio (radio/ radar) altimeter. This height above ground is especially important during approach and low-altitude flight because it reflects height above terrain rather than above sea level. The term used for this measurement in aviation is radio altitude, which is why that option is the best choice. The other options imply a setting or use the radar terminology in a way that doesn’t describe the measurement itself.

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