esults of the tests is published in the January-February issue of the Journal the first cost of a range finder; while the latter is depression instrument, or where the height of the battery and surrounding fortifications is too low to more accurate and far more durable than the gun itself of the… … The position under is located in a masked position on some suitaDie elevation of known height above tide level. This height forms tne Dace for calculating tne triangle. The angle at the base is 90 degrees ; and the angle at the instrument being observed, the distance to the ship is calculated. This…
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