Bearings
Bearings are a measure of direction, with North taken as a reference.
If you are travelling North, your bearing is 000°, and this is usually represented as straight up on the page.
If you are travelling in any other direction, your bearing is measure clockwise from North.
Example
Look at the diagram below:
If you walk from O in the direction shown by the red arrow, you are walking on a bearing of 110 °.
REMEMBER: Bearings are always measured clockwise from North and are given as 3 digits.
Here are some more examples:
Note that the first two bearings above are in directly opposite directions to each other.
They have different bearings, but they are exactly 180° apart as they are in opposite directions.
A line in the opposite direction to the third bearing above would have a bearing of 150° because 330°  180° = 150°.
These bearings in the opposite direction are called back bearings or reciprocal bearings.
Example Questions
Example Question 1
Points of the compass can all be converted into bearings. We already know that North is 000°.
Find the bearings for:
(a) East (E)
(b) South (S)
(c) SouthEast (SE)
Example Question 2
A ship sails from A to B on a bearing of 120°.
On what bearing will it have to sail to return from B to A?
We can extend the line from A to B, then rotate through 180° to head in the opposite direction.
We can see from the diagram above that the bearing from B to A is 300°, because 120° + 180° = 300°.
REMEMBER: Bearings in exactly opposite directions are called back bearings and are always 180° apart.
