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It all began in the 1930’s when pioneering waterman Tom Blake looked for a way to maintain some directional control whilst surfing his hollow, box-railed, paddle board. The sharp, square, edges of Blake’s “cigar box” paddle board sheared water away from the rails and the boards slid out of control easily until he came up with the idea of bolting a small metal keel from a water ski onto the bottom of the board to help it keep going in a straight line. By the 1950s fins had become de-rigeur on surfboards, although they were still used in conjunction with the rail line to provide hold.