The USS Arkansas (BM-7) was a notable example of the last generation of "New Navy" monitors built by the United States, designed primarily for coastal defense. Constructed by Newport News Shipbuilding & Dry Dock Company, she was ordered on May 4, 1898, and her keel was laid down on November 18, 1899. Launched on November 10, 1900, she measured approximately 255 feet in overall length, with a beam of 50 feet 1 inch and a draft of 12 feet 6 inches. Displacing around 3,225 long tons, Arkansas was manned by a crew of 13 officers and 209 men. Propelled by two vertical triple expansion engines driving screw propellers and powered by four Thornycroft boilers, her machinery was designed to produce 2,400 indicated horsepower, though sea trials achieved just over 1,700 ihp, attaining a top speed of about 12 knots. Her operational range was approximately 2,360 nautical miles at 10 knots. Arkansas's armament included two 12-inch/40 caliber guns mounted in a single turret, providing heavy firepower for coastal bombardments. Her secondary armament comprised four 4-inch/50 caliber guns, supplemented by three 57mm Hotchkiss QF 6-pounder guns. Her armor protection was substantial, with an 11-inch main belt tapering to 5 inches at the ends, and turret armor between 9 and 10 inches thick, ensuring significant resistance against enemy fire. Designed during a period of heightened coastal defense, Arkansas was initially part of a program authorized by Congress in 1898, intended to bolster U.S. shore defenses during the Spanish-American War. However, her role evolved as the Navy shifted focus, and she was renamed Ozark in 1909 to free her name for a new battleship. She served various roles, including instruction at the Naval Academy, and was later refitted as a submarine tender in 1913. Her service included participation in the U.S. occupation of Mexico during the Tampico Affair in 1914 and subsequent duties protecting American shipping interests along the Mexican coast during World War I. Decommissioned in 1919 and redesignated BM-7 in 1920, Ozark was sold for scrapping in 1922. Her construction and service reflect the transitional period in U.S. naval strategy from coastal defense monitors to a modern fleet, marking her as a significant vessel in the evolution of early 20th-century naval technology and tactics.

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