Four Winns introduced its first split-chine boat, the SL262, in mid-2007. The exaggerated chines under the bow made the boat look like a tri-hull at first glance. When we tested it, however, those sponsons never touched the water. They were developed to support a higher sheerline, thus allowing the deck to meet the hull at its widest point and remain there all the way up the gunwales. In other words, it's wide from the bottom up instead of flaring out.