航海英語遇險通信單項選擇題每日一練(2019.07.26)

來源：考試資料網(wǎng)

1 What is the fundamental purpose for imposing radio silence? （）

2 A distress signal（）.

3 Which of the following statements about transmitting distress messages by radiotelephone is INCORRECT?（）

4 Wat is NOT required in the radiotelephone log?（）

5 What is NOT a distress signal?（）