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(2019.01.25)

來源：考試資料網(wǎng)

1 The Flinders bar on a magnetic compass compensates for the（）.

2 When adjusting a magnetic compass using the fore-and-aft permanent magnets，you should（）.

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

4 The vertical component of the Earth’s magnetic field causes induced magnetism in vertical soft iron. This changes with latitude. What corrects for this coefficient of the deviation? （）

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5 The quadrantal spheres are used to（）.

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