Wouter I am ignorant about this so bare with me.
I have used several cats these last years and one stood out as very fast on a reach and VERY stable. It planed like a speadboat. IT was an 18 foot Tiger Shark designed by Ron Given in NZ. IT has hard chines and a vee hull at the rear section.
I am presuming these new hulls are also trying to pierce waves but then convert that displacement as effectively as possible toward the rear of the boat.
This would help planing up wind and certainly keep it more stable downwind.?
Do I make sense?
