航海英語(yǔ)雷達(dá)及ARPA的使用單項(xiàng)選擇題每日一練(2019.01.23)

來(lái)源：考試資料網(wǎng)

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

2 When using an ARPA，what should you consider in order to evaluate the information displayed?（）

3 No assumptions（）on the basis of scanty information，especially scanty radar information.

4 The radio waves used for radar are very short，only（）long.

5 What is TRUE of the history display of a target’s past positions on an ARPA?（）