航海英語雷達及ARPA的使用單項選擇題每日一練(2019.01.08)

來源：考試資料網(wǎng)

1 PPI is（）.

2 Which condition indicates that your radar needs maintenance?（）

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

4 Which statement concerning the operation of radar in fog is TRUE?（）

5 My radar is not working.I require shore based radar assistance.Is shore based radar assistance（）?