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(2019.01.18)

來源：考試資料網(wǎng)

1 What is used to correct for both induced and permanent magnetism，and consequently must be readjusted with radical changes in latitude（）.

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2 The magnetism in the various structures of a ship changing as a result of cruising，vibration，or aging is termed（）.

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3 A vessel is heading magnetic east and its magnetic compass indicates a heading of 086°.Which action should be taken to remove this error during compass adjustment（）.

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4 The magnetic compass magnets are acted on by the horizontal component of the Earth’s total magnetic force. This magnetic force is GREATEST at the（）.

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5 Variation in a compass is caused by（）.

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