DME distance is determined by measuring what?

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Multiple Choice

DME distance is determined by measuring what?

Explanation:
DME distance comes from the round-trip time of the radio signal between the aircraft and the ground station. The aircraft sends an interrogation, the ground station replies, and the DME receiver measures the time elapsed. That time is then converted, using the speed of radio waves (essentially the speed of light), into a distance, displayed in nautical miles. It’s a timing-based measurement, not something you get from counting beacons, reading GPS, or guessing from airspeed.

DME distance comes from the round-trip time of the radio signal between the aircraft and the ground station. The aircraft sends an interrogation, the ground station replies, and the DME receiver measures the time elapsed. That time is then converted, using the speed of radio waves (essentially the speed of light), into a distance, displayed in nautical miles. It’s a timing-based measurement, not something you get from counting beacons, reading GPS, or guessing from airspeed.

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