CASE 08        

Rule 42.1, Propulsion Basic Rule
Rule 42.2(d) ,Propulsion: Prohibited Actions

While reaching at good speed, a boat does not break rule 42 when her helmsman, anticipating and taking advantage of waves generated by a passing vessel, makes helm movements timed to the passage of each wave. This is not sculling but using the natural action of the water on the hull.

Summary of the Facts
Two small dinghies, A and B, were reaching at about hull speed in an 8- knot wind. A large power cruiser passed by rapidly on a parallel course to leeward, creating several large waves. As each wave reached A’s quarter, her helmsman moved his tiller across the centre-line in a series of course changes rhythmically timed to the passage of the waves under his boat. This was done only during the encounter with the waves generated by the cruiser. B protested A under rule 42.2(d) for sculling. The race committee disqualified A and she appealed.

Decision
Taking advantage of wave action is consistent with rule 42.1. To do so, a helmsman may move his tiller as he thinks best. Appeal upheld.

USSA 1962/91