Military sketching and map reading; including panoramic sketching and aerial photography (1921)
Grieves, Loren Chester, 1878- · Washington : United States Infantry Association · leaf 16
eobtained. Third Method By Aid of the Watch and Sun.—Lay the watch onsome level surface and revolve it until the hour hand pointsdirectly under the sun. Then by reference to the divisionson the dial, determine a point on it midway between thehour hand and twelve oclock. A line through this pointand… … Fig. 2 straight stick across the face of the watch and then bring-ing the hour hand into this shadow. The watch method will not answer during certain sea-sons in the tropics when the sun passes directly overhead. There is also another slight error due to the fact thatin some sections there is a…
Maps, Military · Military sketching
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