Captain Tim Johnson Teaches Tides And Currents At Columbia

Captain Tim Johnson Teaches Tides And Currents At Columbia

Captain Tim Johnson, author of The History of Open-Water Marathon Swimming, gave a scientifically-oriented speech at the Global Open Water Swimming Conference at Columbia University on tides, currents and other marine elements that potentially have significant influence – either positive or negative – on the speed and direction of the swimmers.

Photo courtesy of Skip Storch.

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