USS Illinois (BB-7) was a pre-dreadnought battleship serving the United States Navy, notable as the lead ship of her class. Constructed by Newport News Shipbuilding & Dry Dock Company, her keel was laid in February 1897, and she was launched in October 1898, before being commissioned in September 1901. She measured 374 feet in length overall, with a beam of 72 feet 3 inches and a draft of 23 feet 6 inches. Her displacement was approximately 11,565 long tons designed, rising to 12,250 long tons at full load. Illinois was powered by two triple-expansion steam engines developing 10,000 indicated horsepower, driving two screw propellers, with steam supplied by eight coal-fired fire-tube boilers. Her top speed was 16 knots. The ship's armament consisted of four 13-inch (330 mm)/35 caliber main guns in twin turrets—two forward and two aft—and fourteen 6-inch (152 mm)/40 caliber secondary guns housed in casemates. For close-range defense, she carried sixteen 6-pounder guns and six 1-pounder guns, along with four 18-inch torpedo tubes. Her armor protection included a main belt of 16.5 inches over vital spaces, with the main gun turrets featuring 14-inch faces and the supporting barbettes armored with 15 inches of plating. The conning tower was protected by 10 inches of armor. Illinois's service history was distinguished by peacetime deployments, including service with the European Squadron and North Atlantic Fleet. She participated in the historic cruise of the Great White Fleet from 1907 to 1909, demonstrating American naval power globally. During her career, she experienced collisions with Missouri and Alabama and was the first in her class to win the Battenberg Cup. After her active service, Illinois was decommissioned in 1909 for modernization, rejoining the fleet until 1912. She was later loaned to the New York Naval Militia and converted into a floating armory in 1924, as mandated by the Washington Naval Treaty. Renamed Prairie State in 1941, she served as a training ship during World War II and remained in naval use until she was sold for scrap in 1956. Her long career encapsulates the evolution of pre-dreadnought battleships and reflects the shifting priorities of the U.S. Navy in the early 20th century.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.