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On initial radio contact with an ATS unit the pilot shall transmit the

  1. Amanufacturer’s name or type of aircraft and last four letters of the registration in phonetics.Correct answer
  2. Blast three letters of the registration in phonetics.
  3. Cwhole registration in phonetics.
  4. Dtype of aircraft and the last three letters of the registration in phonetics.

Why this is the answer

Per the TC AIM call-sign procedure, the first call to an ATS unit gives the manufacturer's name or aircraft type plus the last four letters of the registration spoken in phonetics — not three letters and not the whole registration.

Reference

TC AIM-COM– Call Signs / Civil Aircraft

Question reproduced verbatim from Transport Canada’s PSTAR Study and Reference Guide (TP 11919E). The answer key is Transport Canada’s; the explanation is ours.

A study aid — not a substitute for the official guide, the CARs, or your instructor.

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