航海英語(yǔ)海上通信基本知識(shí)單項(xiàng)選擇題每日一練(2019.01.17)

來(lái)源：考試資料網(wǎng)

1 When should the emergency position-indicating radiobeacon be activated after abandoning a ship?（）

2 Automatic identification systems (AIS) are required to（）.

3 AMVER is a system which provides（）.

4 Take tug’s towing line to（）.

5 Electrical wiring on all T-Boats must be（）.