Quote:
Originally Posted by Matador.es
simple, get the ships lengt, measure the seconds it takes to move from the front to back over the vertical line of your scope. Divide meter by seconds, multiply by, 1.856 and you have speed in knots.
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Not quite, 3600/1852= 1.944 (you also have to deal with seconds-to-hours)
But 2 would be easy and good enough for short range shots.