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Section 4.8
You say?
You say?
a and b are correct
c. bearing should be 180-1.4=178.6 degrees
For part (c), where did 180 degrees come from? Can you draw the correct geometric figure to illustrate all points of interest?
View attachment 1201 so, 180-1.4 degrees
Example 2
A ship sails from A to B on a bearing of 120°.
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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.
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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.