All the new Bavarias have them. So do the latest offerings in the Jeanneau Sun Odyssey and Hunter lines, as well the subjects of this review, the 2012 Beneteau Oceanis 41 and 45. We’re talking about distinct hull chines, at one time, due largely to fabrication matters, an exclusive feature of metal boats. The design feature began turning up in fiberglass production boats, though, when Beneteau introduced its redesigned First models, and later the company carried it to its Sense line. It turns out that a chine—in the case of the new Beneteaus, a subtle, angled crease, almost halfway up the freeboard, that runs continuously for the full length of the hull—can do more than make a welder’s life easier.