PSTAR Online Course

Part 3: Communications

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

(1) the receiver mode of the ELT.
(2) 121.5 MHz on the aircraft receiver.
(3) 121.5 MHz during the first 5 minutes of each hour.
(4) the voice frequency of the navigation aid in use.

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