SC-21 (Surface Combatant for the 21st century) was a research and development program started in 1994 intended to design land attack ships for the United States Navy. A wide variety of designs were created and extensively examined, including an …

USS SC-21, until July 1920 known as USS Submarine Chaser No. 21 or USS S.C. 21, was an SC-1 -class submarine chaser built for the United States Navy during World War I. SC-21 was a wooden- hulled 110-foot (34 m) submarine chaser built at …

The SC-1 class was a large class of submarine chasers built during World War I for the United States Navy. They were ordered in very large numbers in order to combat attacks by German U-boats, with 442 vessels built from 1917 to 1919. This …

Commissioned 19 October 1917 and was assigned to the Second Naval District, operating with the Experimental Unit at New London, Connecticut. Sold 24 June 1921 to Joseph G. Hitner of Philadelphia, PA. Fate unknown. Displacement 85 t. Speed 18 kts. Propulsion: Three Standard 220hp gasoline engines, three shafts.

USS SC-21, until July 1920 known as USS Submarine Chaser No. 21 or USS S.C. 21, was an SC-1 -class submarine chaser built for the United States Navy during World War I.

SC 21 was built at the New York Shipyard in Brooklyn. This chaser was placed into commission on 20 September 1917, under the command of Lt. Alfred Y. Lanphier, who would later take command of the USS Patterson Group.

The SC-21 System Program represents a family of ships for the Navy's surface forces for the 21st Century. This Family includes a destroyer class (DD 21) and a cruiser class of ships.

Shortly after completing the COEA in 1997, the SC 21 was renamed DD 21 to emphasize its "destroyer" missions. The Navy plans to acquire a class of 32 DD 21s, with two primary operational capabilities: Land Attack and Maritime Dominance.

uss SC-21,united states navy world war 1,WWI victory,medal,transport clasp,escort clasp,armed guard clasp,grand fleet clasp,patrol clasp,asine operation, anine-marneoperation,st mihiel operation,meuse-argonne operation ,toulon-tryonsector,chateau-thierry sector,marbache sector,limey sector -lorraine

SC21 (United States), a United States Navy program of the 1990s for new ship designs USS SC-21, a United States Navy submarine chaser commissioned in 1917 and sold in 1921 South Carolina Highway 21 Scandium, chemical element, symbol Sc and atomic number 21 Topics referred to by the same term