The U.S. Navy's Major Caliber Lightweight Gun (MCLWG) program was the 8"/55 caliber Mark 71 major caliber lightweight, single-barrel naval gun prototype (spoken "eight-inch-fifty-five-caliber") that was mounted aboard the USS Hull (DD-945) in 1975 to test the capability of destroyer-sized ships to provide shore bombardment support with the range previously available from decommissioned cruisers. United States naval gun terminology indicates the gun fired a projectile in diameter, and the barrel was 55 calibers long (barrel length is 8" × 55 = 440" or 11.165 meters.)