航海英語安全用語單項(xiàng)選擇題每日一練(2019.01.24)

來源：考試資料網(wǎng)

1 Deficient oxygen content inside a chain locker can be detected with（）.

2 Before entering the chain locker，you should（）.

3 （）of the following messages is allowed to be transmitted on the radiotelephone without the authority of the Master.

4 Continuous sounding of a fog whistle by a vessel is a signal（）.

5 Proper use shall be made（）radar equipment if fitted and operational.