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(2019.01.07)

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（）.

2 Magnets are placed in horizontal trays in the compass binnacle to compensate for the（）.

3 Knowing the compass heading that is 90°to the side of a ship will enable the operator of a survival craft to initially steer（）.

4 A ship under construction or major repair will acquire permanent magnetism due to（）while sitting stationary in the earth’s magnetic field.

5 True heading differs from magnetic heading by（）.