航海英語雷達及ARPA的使用單項選擇題每日一練(2019.01.25)

來源：考試資料網(wǎng)

1 The ARPA may swap targets when automatically tracking if two targets（）.

2 What provides little or no indication that a vessel is dragging anchor? （）

3 Which statement is true concerning a vessel equipped with operational radar?（）.

4 You are scanning the radar screen for a buoy fitted with racon. How should this signal appear on the PPI display?（）

5 When hitting a solid object such as a ship or an airplane，the radar waves are reflected back （）they came.

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