Page 65 - Judge Manual 2017

In stronger winds, it is often difficult to differentiate between rapid trimming and
pumping. The rules permit trimming that is in response to changes in wind,
gusts or waves, even if rapid. However, they do not permit repeated trimming
that is not connected to wind or waves. A competitor may not constantly pump
their sails.

Common infractions
Repeated trimming that is not in relation to waves or wind.
Pumping a sail more than once per wave
Body pumping to promote surfing and/or planing
Pumping a sail when already surfing or planing
Ooching (generally in stronger winds to promote surfing)

Positioning of Jury boats

One Jury boat should stay to leeward of the fleet. The boat that was at the
windward mark watches from the windward side of the fleet.

If you see an improper action during a mark rounding, wait until the boat is clear
of the mark and on the next leg to signal the penalty.

I.8.4 Run

If Judges see the competitor rolling the boat by repeatedly moving their bodies
the same way as the mast with no change of direction, the competitor is rocking.
In positive rocking, the windward roll is caused by the competitor moving to
windward first. In negative rocking, the competitor begins the rocking by moving
to leeward first. If the competitor is moving his body to counter the roll of the
boat it is permitted trimming.

The best way to identify boats that may be rocking illegally is to keep a wide
view. Your eyes will naturally pick out boats that are rolling more than those
around them. Watch those boats to identify what is causing the extra rolling.
You should penalize body motion or repeated trimming not related to the wind
or waves that is inducing the rolling and is not permitted by the exception.
This can be difficult to judge, as competitors combine permitted and prohibited
actions. Talk over the specifics of what you see with your fellow Judge. If you
are not certain that the motion is permitted, watch for a little longer, and penalize
only when both Judges are satisfied that the rolling is prohibited and that they
would be able to describe clearly the prohibited body motion to the competitor.

The World Sailing interpretation, ROCK 3 notes that competitors are not
required to stop their boat’s background rolling. However, when the boat is set
up to be unstable, a single roll may be enough to induce repeated rocking and
is prohibited (ROCK 5).

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