Leeward mark roundings embody many of the considerations needed with a skinny-keel boat. In an Etchells, you can be turning as you pass the mark. In fact, you can even luff up a bit, use your momentum and then turn back down without a ton of speed, and you’ll create a beautiful lane. The boat glides, the keel is fat, and you don’t really stall. Do that on a Melges 24, Melges 20, or a J/70, and you’ll go sideways. Onboard, it might not be obvious how much you’re losing, but from a coach boat it is: Boats that do those button-hook turns around the leeward mark get crushed. It’s important to be more calculating and a little farther away from the mark as you approach it—at least as much as the fleet allows.