Ifashipisproceedingtowardsthemagneticequatortheun

If a ship is proceeding towards the magnetic equator, the uncorrected deviation due to permanent magnetism ______.

A.increases

B.remains the same

C.decreases

D.is unimportant and may be neglected

正确答案：C
假如船舶正朝着磁赤道航行未经修正的自差由于永久磁性影响而减少