How to Torpedo a Ship

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For a torpedo to intercept a ship, their trajectories to impact must take the same time. The locus of all points meeting this condition, subject to the parameters of bearing, distance, and relative speeds, is the circle of Apollonius.

Contributed by: Bensøn R. Sundheim (March 2011)
Open content licensed under CC BY-NC-SA




P. J. Nahin, Chases and Escapes, Princeton, NJ: Princeton University Press, 2007.

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