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The diagram shows the relationship between true, magnetic, and grid azimuths and bearings.

Azimuths

The diagram shows the relationship between true, magnetic, and grid azimuths and bearings.

"Measurement of distance on a map by means of an engineer's scale." -U.S. Chief of Engineers

Engineer's Scale

"Measurement of distance on a map by means of an engineer's scale." -U.S. Chief of Engineers

"The map measurer is an instrument specially designed for quickly measuring distances or lines on a map. It consists of a dial case, handle, and a small wheel or roller." -U.S. Chief of Engineers

Map Measurer

"The map measurer is an instrument specially designed for quickly measuring distances or lines on a…