航海英語(yǔ)雷達(dá)及ARPA的使用單項(xiàng)選擇題每日一練(2019.01.16)

來源：考試資料網(wǎng)

1 Radar reflectors are required for（）.

2 When will the float-free emergency position indicating radiobeacon be activated after abandoning ship? （）

3 What is TRUE when operating in fog and other vessels are detected by radar?（）.

4 The radar control that shortens all echoes on the display and reduces clutter caused by rain or snow is the（）.

5 You are underway in thick fog. You have not determined if risk of collision exists. Which statement is TRUE?（）.