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True airspeed is obtained from equivalent airspeed by correcting for

  • A.Air density
  • B.Compressibility
  • C.Position error
  • D.Wind

Answer: A

Correct answer: Air density

The chain runs indicated, calibrated, equivalent, true, and each step removes one effect. Instrument and position error take indicated to calibrated, compressibility takes calibrated to equivalent, and density takes equivalent to true. Wind belongs to none of them - it converts true airspeed to ground speed, which is a navigation quantity rather than an air data one.

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