航海英語(yǔ)航海儀器使用說(shuō)明書(shū)單項(xiàng)選擇題每日一練(2019.01.09)

來(lái)源：考試資料網(wǎng)

1 AREAS WHICH CANNOT BE SCANNED BY THE RADAR OF THE VESSEL BECAUSE THEY ARE SHIELDED BY PARTS OF ITS SUPERSTRUCTURE，MASTS，ETC means（）.

2 The transmission time duration of a single pulse of radio-frequency energy is a function of the（）.

3 （）20 targets can be tracked at one time．When maximum tracking capacity is reached，no further acquisitions are possible.

4 A radar range to a small，charted object such as a light will provide a line of position in which form?（）.

5 If a magnetic compass is not affected by any magnetic field other than the Earth’s，which statement is TRUE?（）.