The convertible sport-fish customer has a need for speed. Simply put: You must be in the 40-knot range to compete with the custom-built pelagic pugilists. Hatteras Yachts answered with its GT Series. Ranging from 54 to 70 feet, the GT line is designed to run at 40-knot speeds with a mid-30-knot cruise. The GTs are the builder’s first totally resin-infused hulls, which saves weight, although the boats retain a sturdy, solid-fiberglass hull bottom common to all Hatteras models. Inspired by her home state — with Carolina bow flare, handsome tumblehome and a pod-style helm on her flybridge — the Hatteras GT is at once sleek and imposing. The modified-V hull form and sharp entry ensure plenty of giddyap from the hole; lifting strakes and double chines promise a dry ride. Prop tunnels help create lift while backing down on big fish, keeping the cockpit dry. The GTs also have PipeWelders tuna towers, carbon fiber hardtops (on the convertibles), mezzanine decks and commodious cockpits ready for big-fish battles.