航海英語雷達及ARPA的使用單項選擇題每日一練(2019.01.24)

來源：考試資料網

1 When you turn on the fast time constant (differentiator) control of a radar it will（）.

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

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

4 （）is not used in modern radar.

5 The description Racon beside an illustration on a chart would mean a（）.