SloopJohnB

Thanks Eric.

Thanks John, let me get this straight, if a boat weights 4025 grms (sitting lower in the water), it still has to meet the 420 mm max keeel draft and the 60 mm hull draft?

Thanks John, so a top swivel is not permitted.

Is there a updated document that shows the size and location of the sail numbers and national letters, I have a copy of Marcus Wahlin 2012, is this an offical document?

Do the rules allow for a swivel at the top of the forestay just below the hook but above the forestay and topping lift attachments? This arrangement allows the jib boom to swing far more freely.

Thanks for the replies, I have been told that boats can be "wet measred" without the rig in and weights added to bring the hull up to 4000 grms, surely this method would make the LCG/LCB changes if the makeup weight does not match the LCG of the rig. So if measuring with the rig in and the total weight of the hull & rig is greater than 4000 grms this will make the hull float low and may increase the draft greater than 420 mm, what happens in this case. The immersion rate would vary greatly depending on the design take for example my Cockatoo and V10, at a guest the Coockatoo would have half the immersion rate of the V10. At regattas here the boats are checked for overall weight, sometimes the all 3 rigs are weighed and the fin and buld are weight separately.

John Thanks for your reply, is this procedure laid out in the "Measurer's Guide" or some other document?

I would like to know when using a tank for wet measuring C.4: a) does it have to have the rig in or b) make up weights to bring to 4000 grms I can see a problem with (a) if a boat weights more then 4000grms and (b) if the makeups are not in a location that represents the cog of the rig and alter the actual float trim. I can't find any information/procedures to carry out a "wet measurment". I look forward to your answers.

It was over at Adelaide for the SA IOM and Ozzie ION Nats Mar 2024, Red Ant Yachts had a great setup with a large digital countdown display great for us def skippers.

After reach across between the windward mark and the seperation mark the boat on the inside decides to do a gybe to port, at the seperation mark to sail the lefthand side of the run. In doing so she hits the mark, does that gybe constitutes part of the pently turn (1 gybe &1 tack or 1 tack & 1 gybe)? In doing her tack after the gybe she tangles up with following boats that have gybed to port, at that point the boat doing the PT is on starbord tack and the other boat are on the port gybe. At what point of the turn has she completed her turn, is it when she is back on course heading the bottom mark? I know that the boat in the wrong has to sail clear which maybe the case when she is in the first group of boats and is clear to take her penalty, but when the second wave of boats come around the mark and fan out for the run she is not clear.