Magnetic Dip
It is the inclination of magnetic needle of compass with horizontal Dip is 0 at equator, 90° at poles. Dip is not constant.
Magnetic Declination Magnetic declination is the horizontal ∠betn True Meridian & Magnetic Meridian through the pt under consideration.
Types
Declination west (θW)
If the magnetic meridian is on the left side of true meridian, the angle formed betn the two meridians is Declination west.
Declination east (θE)
If the magnetic meridian is on the right side of true meridian, the angle formed betn the two meridians is Declination east.