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What distance does distance measuring equipment (DME) display?
Choices
✓ Slant-range distance to the station in nautical milescorrect
DME reads slant range — the straight-line distance from the aircraft to the station.
Horizontal distance over the ground in statute miles
DME measures slant range, not horizontal ground distance, and it reads in nautical miles.
The remaining fuel range of the aircraft
DME measures distance to a ground station, not fuel range.
Distance to the destination airport regardless of stations
DME requires a DME-equipped ground station such as a VOR/DME or VORTAC.
Why
DME displays slant-range distance — the straight-line distance from the aircraft to a DME-equipped station — in nautical miles, so directly overhead the station it reads approximately the height above it.
FAA source: PHAK Ch. 16browse the reference library →
Original study question written for this course — representative of FAA knowledge-test topics, not an actual current FAA exam question.