Fins work best when they’re tight against the hull throughout their rotation. Water escaping between the top of the fin and the hull adds drag, reduces efficiency. Here, a section of the round bottom has been flattened to accommodate the fin.
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. ▶