USS Merrimack.

Robert Gray

Sergeant Major
Joined
Jul 24, 2012
USS Merrimack, also improperly Merrimac, was a steam frigate, best known as the hull upon which the ironclad warship CSS Virginia was constructed during the Civil War. Merrimack was the first of six screw frigates (steam frigates powered by screw propellers) begun in 1854. Like others of her class (Wabash, Roanoke, Niagara, Minnesota and Colorado), she was named after a river.

Merrimack was launched by the Boston Navy Yard June 15, 1855 and commissioned 20 February 1856. Shakedown cruises took the new screw frigate to the Caribbean and to Western Europe before returning to Boston and decommissioning April 22, 1857 for repairs. Recommissioning September 1, 1857, Merrimack got underway from Boston Harbor October 17 as flagship for the Pacific Squadron. She rounded Cape Horn and cruised the Pacific coast of South and Central America until heading for home November 14, 1859. Upon returning to Norfolk, she decommissioned February 16, 1860.

Merrimack was still in ordinary during the crisis preceding Lincoln's inauguration. Soon after becoming Secretary of the Navy, Gideon Welles took action to prepare the frigate for sea, planning to move her to Philadelphia. The day before the firing on Fort Sumter, Welles directed that "great vigilance be exercised in guarding and protecting" Norfolk Navy Yard and her ships. On the afternoon of April 17, 1861, the day Virginia seceded, Engineer in Chief B. F. Isherwood managed to get the frigate's engines lit off; but the previous night secessionists had sunk light boats in the channel between Craney Island and Sewell's Point, blocking Merrimack. On April 20, before evacuating the Navy Yard, the U.S. Navy burned Merrimack to the waterline and sank her to preclude capture.

The Confederacy, in desperate need of ships, raised Merrimack and rebuilt her as an ironclad ram, according to a design prepared by Lt. John Mercer Brooke, CSN. Commissioned as CSS Virginia February 17, 1862, the ironclad was the hope of the Confederacy to destroy the wooden ships in Hampton Roads, and to end the Union blockade which had already seriously impeded the Confederate war effort.

Edited from Wikipedia.

Photo credits:

Getty Images
D Van Nostrand Company - National Archives
www.lot-art.com

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1855 USS Merrimack.jpg


USS_Merrimack_(1855)_sectional_view.jpg
 
For once Wikipedia got it right. The casemate of the conversion is indeed John Mercer Brooke's. John L Porter produced the drawings and supervised the conversion. The Norfolk Chief Carpenter Joseph Pearce was occupied with His Rocketts counterpart James meads in constructing and supervising Brooke's experimental targets on Jamestown Island
 

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