航海英語(yǔ)航海儀器使用說(shuō)明書單項(xiàng)選擇題每日一練(2019.01.15)

來(lái)源：考試資料網(wǎng)

1 The principal purpose of adjustment of the magnetic compass is to eliminate（）as far as possible.

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

3 If the gyrocompass error is east，what describes the error and the correction to be made to gyrocompass headings to obtain true headings?（）.

4 The number of pulses of energy transmitted per second is call the（）.

5 The radar component that generates the radio-frequency energy in the form of short powerful pulses is which of the following?（）.