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Multiple Choice

DME distance readout is best described as?

DME distance readout is the slant range—the straight‑line distance from the aircraft to the DME ground station. DME works by sending pulses and measuring the two‑way travel time, then converting that time to distance using the speed of light. The readout reflects the direct line‑of‑sight distance, not just the vertical altitude difference or the ground horizontal distance. While time to station is a part of how the measurement is made, the cockpit display shows distance, not time. At higher altitudes, the slant range is slightly longer than the horizontal ground distance, but in all cases the value shown is the line‑of‑sight distance to the station.

DME distance readout is the slant range—the straight‑line distance from the aircraft to the DME ground station. DME works by sending pulses and measuring the two‑way travel time, then converting that time to distance using the speed of light. The readout reflects the direct line‑of‑sight distance, not just the vertical altitude difference or the ground horizontal distance. While time to station is a part of how the measurement is made, the cockpit display shows distance, not time. At higher altitudes, the slant range is slightly longer than the horizontal ground distance, but in all cases the value shown is the line‑of‑sight distance to the station.