Finch, James Kip, 1883- · New York : John Wiley & Sons, Inc. · leaf 120
BUnder b … Fig. 56.—Traversing with a Sketch Board. with a scale of paces along the line drawn on the map froma in the direction of B. The board is now moved and is set up over the point B,Fig. 56b. The first step is to orient the board, or so turnit that it will be in a parallel position to that occupied at…
Cartography · Military maps
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
