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Ekelund Range 2.0

Ekelund Range
This app is designed to check the accuracy of a submarine officer's Ekelund range estimate of a target based on bearing rate, using the formula developed at the US Navy Submarine School.

The Ekelund range is useful for estimating range to a contact with only its SONAR bearings. The app takes your vessel's speed, course, bearing to the target, and the target's change in bearing rate over two maneuvering legs.