单选题
Which of the following statements about transmitting distress messages by radiotelephone is INCORRECT?（）
发布日期：2021-03-22
Distress messages should first be transmitted on 2182 kHz
Channel 16 (156.8 MHz) may be used for distress messages
If no answer is received on the designated distress frequencies，repeat the distress call on any frequency available
It is advisable to follow a distress message on 2182 kHz by two dashes of 10 to 15 seconds duration
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