航海英語雷達(dá)及ARPA的使用單項(xiàng)選擇題每日一練(2019.01.12)

來源：考試資料網(wǎng)

1 （）is not a job of the radar antenna.

2 You are using a radar in which your own ship is shown at the center，and the heading flash always points to 0°. If bearings are measured in relation to the flash，what type of bearings are produced? （）

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

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4 Radar makes it possible and much safer for us to sail（）.

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

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