航海英語磁羅經(jīng)與陀螺羅經(jīng)的使用單項選擇題每日一練(2019.01.09)

來源：考試資料網(wǎng)

1 By convention，the north seeking ends of a compass’ magnets are colored（）.

2 When crossing the magnetic equator the（）.

3 When a magnetic compass is not in use for a prolonged period of time it should（）.

4 The most accurate method of determining gyrocompass error while underway is by（）.

5 Which magnetic compass corrector（s）CANNOT be set on a heading of magnetic east or magnetic west（）.