Define angle of declination.

Define angle of dip.

The angle between the geographical axis and the magnetic axis is 17^(@) , then why does the value of angle of declination change from place to place ?

A ship is to reach a place 20^(@) south of west . In what direction should it be steered if angle of declination at the place is 16^(@) west ?

The angle of declination cannot be equal to zero.

Define angle of rotation.