航海英語雷達及ARPA的使用單項選擇題每日一練(2019.01.09)

來源：考試資料網(wǎng)

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

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

3 The 3-cm radar as compared to a 10-cm radar with similar specifications will（）.

4 The radar control that reduces weak echoes out to a limited distance from the ship is the（）.

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