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Decision making and flight planningQuestion 934 of 934

A flight plan shows the aircraft type as C-150/X. What does the /X mean?

  1. The aircraft has no radio
  2. The aircraft has no GPS
  3. The aircraft has no navigation lights
  4. The aircraft has no transponder
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Correct answer: The aircraft has no transponder

The handbook gives C-150/X as an example of an aircraft with no transponder.

Source: Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 16: Navigation — Filing a VFR Flight Plan, page 408

Practice decision making and flight planning

Questions last reviewed: 18 October 2026