航海英語緊急用語單項(xiàng)選擇題每日一練(2019.01.18)

來源：考試資料網(wǎng)

1 The Urgency Signal（）indicates that the station calling has a very urgent message to transmit concerning the safety of a ship or aircraft，or of some person on board or within sight.

點(diǎn)擊查看答案

2 Which one of the following is the safety signal?（）.

點(diǎn)擊查看答案

3 The radiotelephone message that indicates a station is about to transmit a message concerning the safety of navigation or important meteorological warnings commences with（）.

點(diǎn)擊查看答案

4 In radiotelephone communications，the prefix PAN-PAN indicates that（）.

點(diǎn)擊查看答案

5 A Coast Guard radiotelephone message about an aid to navigation that is off station is preceded by the word（）.

點(diǎn)擊查看答案