NavigationQuestion 293 of 934

What does DME measure?

  1. Magnetic bearing to the VORTAC
  2. Slant range distance to the VORTAC
  3. Course deviation from the radial
  4. Groundspeed over the VORTAC
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Correct answer: Slant range distance to the VORTAC

Slant range is the direct distance between the aircraft and the VORTAC, so altitude affects it.

Source: Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 16: Navigation — Distance Measuring Equipment (DME), page 414

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Questions last reviewed: 18 October 2026