航海英語GMDSS單項(xiàng)選擇題每日一練(2019.01.21)

來源：考試資料網(wǎng)

1 （）are operated as a secondary method of alerting in the GMDSS.

2 How long must GMDSS Radio Logs be retained by the licensee when they relate to a distress situation or disaster? （）

3 Please use（）for（）.

4 We consider（）send a helicopter with medical facilities to the distress area.

5 If your vessel is equipped with a radiotelephone，what must also be aboard?（）