Regulations Governing the Installation and Use of Ship Radio Stations Article 13
When distress traffic has ceased on a frequency which has been used for distress traffic, or complete silence is no longer necessary for a frequency which is being used for the traffic, the ship radio station for controlling the traffic shall transmit on that frequency a message addressed to all radio stations, indicating that normal conditions may be resumed.
中文原文 船舶無線電臺設置使用管理辦法第13條
遇險之船舶無線電臺或管制遇險通信之電臺，當遇險通信已告終止，或作為遇險通信之頻率已無靜默之必要時，應在該頻率上發送對所有電臺之通信，告知得恢復正常工作。