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Fig 2.6 The bearing of a line is measured from the north or from the south (whichever is
closer), in a clockwise or counterclockwise direction (whichever applies)

Assume that a compass is setup successively at points A, B, C and D and
bearings read on lines AB, BA, BC, CB, CD and DC. Bearings AB, BC and CD
are called Forward bearings and BA, CB, DC are Back bearings.

Fig. 2.7 Bearings

2.4 Azimuths
They are horizontal angles measured clockwise from any reference meridians.
They are generally measured from North. They can range from 0 to 360 and
they do not require letters to identify the quadrant.

Fig 2.8 Azimuths

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