Winglets (maybe we should call them “finlets”) at the tip of the fin reduce turbulence and drag by preventing water on the high pressure side from swirling around to the low pressure side. Racing sailboats use the same technique on their keels, and airplanes on wingtips. Note also the guard to keep weed and other debris from getting jammed between fin and hull.
If you plan on going to Miami for the boat shows—or even if you don’t—it’s good to know what’s going on. Our panel of experts weigh in on what to look for at the Miami shows. See what they had to say here. ▶