English: From "FM 4-15 Coast Artillery Field Manual-Seacoast Artillery Fire Control and Position Finding," U.S. War Department, Government Printing Office, Washington, 1940, p. 133.
This image of the M1905 Coast Artillery deflection board is included because its scales are somewhat more legible than the photo image of 1910.
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2010-06-10 20:24 Pgrig 668×345× (55028 bytes) From "FM 4-15 Coast Artillery Field Manual-Seacoast Artillery Fire Control and Position Finding," U.S. War Department, Government Printing Office, Washington, 1940, p. 133. This image of the M1905 Coast Artillery deflection board is included because its
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