What Is a Back Bearing

Back Bearing (B.B) *Back bearing is the bearing of the line in the opposite direction of surveying. *The formula used to calculate the back bearing of line B.B = F.B ± 180° { + sign when F.B less than 180° and – sign when F.B more than 180° }.

What is a back bearing used for?

Using a Back Bearing to identify your position when on a Line Feature. 1. Point the Compass at an easily identifiable feature – e.g. the summit of a prominent hill, some farm buildings, a corner or edge of a forest etc.

What is front bearing and back bearing?

One technique is to do the math. Add or subtract 180° from you forward bearing to get your back bearing. You want the result to fall between 0° and 360°, so if the forward bearing is less than 180°, add 180° to it, and if it’s greater than 180°, subtract 180°. Calculating a back bearing.