Hatteras' 68 Convertible is built on a solid fiberglass convex hull with deep propeller tunnels. The 68's hull shape features a warped bottom, which simply refers to a highly variable deadrise that flows from approximately 20 degrees in the midship sections to a nearly flat 2 degrees at the transom. The convexity of the bow reduces impact accelerations and contributes to an incredibly smooth head-sea ride. Double chines knock spray down and away, as does an exaggerated bow flare. Specially designed strakes that bisect the stagnation line -- the point at which the water's surface meets the hull bottom once on plane -- provide additional dynamic lift, increased stability and improved tracking in all sea conditions. Hatteras tunnels are significantly deeper than most, which reduces draft and allows larger propellers to be tucked in tighter to the hull. This reduces the amount of space needed between the tip of the blade and the hull bottom -- often to as little as 6 percent of the blade diameter. That tight fit into the tunnel provides uniform containment around the blades, which eliminates the slapping of water against the hull that you typically get with a flat bottom. It also helps accelerate the water through the blades, much like a bullet through the barrel of a gun. A sliding door leads to the luxurious salon, which features genuine cherry wood in either a satin or high-gloss polyester finish. A U-shaped, wrap-around lounge provides comfortable viewing of the 42-inch plasma TV, as well as storage below for assembled rods. In the galley you'll find several deep storage drawers and surplus pantry space. Under-counter refrigerators and solid-surface countertops keep the area clean, while a four-burner ceramic cooktop and microwave/convection oven keep it functional. Genuine cherry inserts dress up the appliance fascias. Across from the galley is a large U-shaped dinette with drawers underneath for storage. The area even includes a computer work station for increased productivity on the water. The four-stateroom, four-head layout includes a spacious full-beam master stateroom amidship with king-sized tapered berth and padded headboard. Twin portlights provide ambient light, as well as an emergency exit. Two nightstands, dressers port and starboard, and a walk-in cedar-lined hanging locker accommodate a full complement of gear. The master head features solid-surface countertops, bowed-front cabinetry and Plexi mirror fascia for a spacious feel. Guests can bunk in a VIP guest stateroom in the bow or in the starboard guest stateroom, which includes side-by-side sliding berths. Crew's quarters with an upper/lower bunk arrangement lies to port. All compartments feature padded wall coverings and headliners.
With the 68C, Hatteras uses a patent-pending trim tab design that is located within the propeller tunnel. The tunnel trim-tab system utilizes the thrust energy of the tunnel for increased trim control. In a basic sense, it's the marine version of a thrust nozzle. These tabs achieve the same trim adjustment with only 30 percent of the tab area. A cylindrical keyway and key eliminates stress risers, leading to a significantly longer life for your shafts. Cross-cut bearings use crisscrossing grooves to disperse water and ensure a consistent film of lubricating water, giving longer life to your bearings and less noise while trolling or cruising. Stainless-steel rudders are far stronger and lighter than comparable bronze rudders. All air required for combustion is drawn from underneath the cockpit gunwales via ventilation fans. These fans reduce saltwater intrusion in the engine room, clean up the hullsides, and allow a quicker cooling of the engine room. The fans sense engine rpm and automatically adjust to draw in more or less air, based on the engines' requirement.