Types of Bearing - 

1. Grid Bearing 

2. True Bearing 

3. Magnetic Bearing 

To Convert a Magnetic Bearing to a Grid Bearing. 

Suppose the bearing of a certain point P is measured with a compass and is found to be 1600. To convert this Magnetic Bearing to a True Bearing, follow under mentioned steps:- 

(a) First find out the Magnetic Variation of the Area. Magnetic Variation is given on the Top Right corner of each Map. 

(b) Suppose 50 is the Magnetic Variation of the area. Now subtract this Magnetic Variation to the Magnetic Bearing. 

(c) The resultant is the Grid Bearing i.e. 1550 

To Convert Grid Bearing to Magnetic Bearing. 

(a) Measure the Grid Bearing of an object on the map with help of the service protractor from your own position. 

(b) Suppose the Grid Bearing of the object is 1500.

(c) Now, find out the Magnetic Variation of the area with the help of Map (Magnetic Variation is given on the Top right corner of the map). Suppose Magnetic Variation of the area is 60. 

(d) Now, add this Magnetic Variation to the Grid Bearing. 

(e) The resultant will be the Magnetic Bearing of the object i.e. 1560.