CSS Albemarle
CSS Albemarle was a steam-powered casemate ironclad ram constructed for the Confederate States Navy during the American Civil War.[1] Built in secrecy on the Roanoke River at Edwards Ferry, North Carolina, between 1863 and 1864 under the direction of Commander James W. Cooke, the vessel measured 158 feet in length, had a beam of 35 feet 3 inches, and drew 9 feet of water when loaded.[1][2] Her casemate was protected by 4-inch iron armor plating sloped at 30 degrees, and she was armed with two 6.4-inch Brooke rifled cannons mounted in a single pivot.[3] Albemarle achieved her greatest success in the Battle of Plymouth on April 17–19, 1864, when she rammed and sank the USS Southfield, damaged the USS Miami, and drove off the Union flotilla, enabling Confederate forces to recapture the strategic town of Plymouth and secure control of the Roanoke River and Albemarle Sound.[3][2] On May 5, 1864, she engaged and repelled seven Union warships in the Battle of Batchelor's Bay, demonstrating her effectiveness despite her limited armament and shallow-draft design suited to coastal operations.[4][5] Her operational career concluded on the night of October 27–28, 1864, when she was attacked and sunk in the Roanoke River at Plymouth by a steam launch carrying a spar torpedo, commanded by Union Lieutenant William B. Cushing, which exploded beneath her hull and created a fatal breach.[3][6] The destruction of Albemarle removed the primary Confederate obstacle in the sounds, allowing Union forces to retake Plymouth shortly thereafter.[2]Design and Construction
Technical Specifications
The CSS Albemarle measured 158 feet (48 m) in length overall, with a beam of 35 feet 3 inches (10.7 m) and a loaded draft of 9 feet (2.7 m), dimensions that facilitated operations in shallow inland waterways such as the Roanoke River while limiting seaworthiness.[7][8] Her hull depth was approximately 8 feet 2 inches (2.5 m), contributing to a low profile suited for riverine defense.[9] Propulsion was provided by two horizontal, non-condensing steam engines with link motion, each driving a three-bladed screw propeller via geared transmission, yielding a maximum speed of around 6 knots under favorable conditions despite the engines' reputation for unreliability.[8][7] The engines, constructed on-site by the builder Gilbert Elliott, produced approximately 200 horsepower total, enabling sustained but modest maneuverability in confined waters.[10] The armored casemate, extending 60 feet along the central hull, featured two layers of 2-inch-thick iron plates bolted over 22 to 24 inches of oak and pine wooden backing, with the structure sloped at approximately 30 to 35 degrees to enhance projectile deflection.[11][7] This configuration provided effective protection against contemporary naval gunfire but imposed weight penalties that restricted speed and agility.[12] The ship's complement typically consisted of 150 officers and enlisted men, adequate for operating the vessel, manning its guns, and conducting extended patrols with onboard provisions for self-sufficiency in remote riverine environments.[7][9]| Category | Details |
|---|---|
| Displacement | Approximately 376 tons |
| Hull Material | Yellow pine framing with iron plating |
| Deck Armor | 1-inch iron over timber |