The reaction of a gyrocompass to an applied force is known as（）.

A.remove deviation on the intercardinal headings
B.remove deviation on the cardinal compass headings
C.remove heeling error
D.compensate for induced magnetism in vertical soft iron

A.reduce the variation as much as possible
B.reduce the deviation as much as possible
C.reduce the magnetic dip as much as possible
D.allow the compass bowl to swing freely on its gimbals

A.a collision with another vessel
B.being moored on a constant heading for a long period of time
C.being struck by lightning
D.All of the above