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
A’s appeal is upheld. She is to be reinstated.
The action, while repeated, was not forceful. Any gain in speed did not result
directly from the tiller movement, but from positioning the boat to take advantage
of wave action, which is consistent with rule 42.1. To do so, a helmsman may
move his tiller as he thinks best, provided that his movements do not break
rule 42.2(d).
USSA 1962/91