. . . f the Navy sticks to its schedule, by 2012 two DD(X) ships will be operational, each armed with a battery of two 155mm (6.1-inch) Advanced Gun Systems with a range of no less than 68 miles.
THE PRIMARY REQUIREMENT for the DD(X) program is to "carry the war to the enemy through offensive operations and destroy enemy targets ashore with precision strike and volume fires." Despite the impressive range of the Advanced Gun System, to achieve this requirement DD(X) will operate far closer to shore than its predecessors. In order to "dominate the littoral," the ship has been constructed with a number of features which will offer a tremendous improvement in survivability, the first among which is stealth.
DD(X) is designed to be the quietest surface ship in the fleet. The ship will be quieter even than the Los Angeles class submarines. More remarkable, however, is the ship's unique design, which will greatly enhance its ability to remain invisible to electronic surveillance. To reduce the ship's radar signature, the ship's designers have eliminated right angles from the deck. In addition, the ship's superstructure is built out of a composite material of wood and plastic--the effect of which is both to absorb radar and lessen the overall weight of the ship (leaving room for future, weight-intensive improvements).
Perhaps the most visibly striking feature of the DD(X) is its wave-piercing, tumblehome hull form. The tumblehome hull has a twofold effect. By having the hull slope inward from the waterline, the hull's exposure to waves is reduced, which in turn reduces the rocking motion of the ship, making it less easily detected by enemy radar. In addition, the tumblehome hull will make the DD(X) far more survivable than its predecessors in the event of an underwater explosion from a torpedo or mine.
There's also a rail gun in development for the DD(X) which would have a range of 267 nautical miles. Oh, and it'll make 30 kts.