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En route aircraft should, whenever possible, maintain a listening watch for aircraft in distress on

  1. Athe receiver mode of the ELT.
  2. B121.5 MHz on the aircraft receiver.Correct answer
  3. C121.5 MHz during the first 5 minutes of each hour.
  4. Dthe voice frequency of the navigation aid in use.

Why this is the answer

Per the TC AIM, en-route aircraft should keep a listening watch for aircraft in distress on 121.5 MHz — the international VHF emergency frequency — using the aircraft receiver, not the ELT receiver.

Reference

TC AIM-SAR– ELT Operating Instructions

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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