CASE 08
Rule 42.1, Propulsion: Basic Rule
Rule 42.2(d) , Propulsion: Prohibited Actions
Repeated helm movements to position a boat to gain speed
on each of a series of waves generated by a passing vessel
are not sculling unless they are forceful, and the increase in
speed is the result of a permitted use of the water to increase
speed.
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 without undue force, in a series of course
changes rhythmically timed to the passage of the waves under his boat.
These actions were repeated for each wave and A gained speed on each
occasion. B protested A under rule 42.2(d) for sculling. The protest
committee disqualified A, and she appealed.
Decision
A’s appeal is upheld. She is to be reinstated.
The movement of the tiller, 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).
USA 1962/91