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Strangler View Drop Down
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Posts: 154 		Post Options Post Options   Quote Strangler Quote  Post ReplyReply Direct Link To This Post Topic: Rule 42 interpretations
    Posted: 07 Dec 15 at 11:33pm
Referring to the ISAF interpretations doc
http://www.sailing.org/tools/documents/R42intMay13-[15083].pdf
I am trying to resolve what is legal regarding body pumps [Laser].

ROCK 1 A roll of the boat caused by a gust or a lull followed by a corrective body movement to restore proper trim is permitted by rule 42.1.

Does this mean in non planing conditions its legal even if the leech FLICKS and results in an increase in speed [but remember the gust was going to increase speed anyway].

Or do we have to consider
BASIC 4 Except when permitted under rule 42.3, any single action of the body that clearly propels the boat (in any direction) is prohibited.

But the body movement is not directly causing an increase in speed.

Meanwhile
PUMP 6 Repeated flicks of a sail due to body pumping are prohibited.

This implies a single flick is ok.
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Presuming Ed View Drop Down
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Posts: 641 		Post Options Post Options   Quote Presuming Ed Quote  Post ReplyReply Direct Link To This Post Posted: 07 Dec 15 at 11:48pm
Laser specific guide here: 
http://www.sailing.org/tools/documents/Rule42Laser201320032014-[16804].pdf

Ar you asking about upwind or down? 

Downwind 

  1. DOWNWIND 1. Pumping

    Pumping breaches are most likely to occur on downwind legs. Both body pumping and sheet pumping are not permitted by 42.3(c).
    When reaching in stronger wind conditions, sailors will hike out aggressively in order to keep the boat flat. This trimming is seamanlike and allowed by the rule. Sailors will also change course continuously as they surf the waves, and adjust the trim of the mainsheet accordingly. They may also pump once per wave (or gust) to initiate surfing (or planing). The resulting combinations of movements need to be carefully observed to determine which movements are permitted and which are not.

    Movements that are not permitted include athwartships body movement causing the leach to flick, or sheet pumping when the boat is already on a plane.
    Illegal sheet and or body pumping may also be observed during the run. Positioning of the judges is crucial to be able to distinguish between aggressive but legal sailing and rule 42.2(a) breaches.

    On a reach body pumping may best be seen from behind and to leeward of the Laser, in order to observe the athwartships body movement and the effect it has on the leach.
    On a run sheet pumping best seen from a position abeam of the observed boat, and to leeward.

    Permitted actions:

    • Trimming the boat or sail in the prevailing conditions. – PUMP 2

    • Pumping a sail once per wave or gust of wind to initiate surfing or planing. Note that to

      qualify as surfing, the boat must rapidly accelerate down the front of the wave – 42.3(c) Prohibited actions: 

      • Body pumping causing repeated flicks on the leach. – PUMP 6

      • Trimming the sail in order to fan it. – PUMP 1

      • Pumping the sail when already surfing or planing. – PUMP 12

      • A third consecutive unsuccessful attempt is prohibited – PUMP 8

        Gathering evidence:

      • Are there surfing or planing conditions?

      • Does one pump per wave or gust of wind initiate surfing or planing?

      • Is the boat pumping while already surfing or planing?

      • Could the trim and release be a response to wind shifts, gusts or waves?

      • Is the repeated trim and release fanning the sail?

      • Can you connect the flicking leach with body movements?

 
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Strangler View Drop Down
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Posts: 154 		Post Options Post Options   Quote Strangler Quote  Post ReplyReply Direct Link To This Post Posted: 08 Dec 15 at 12:33am
Thanks for that link. I had downwind in mind, particularly reaching.
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