A captured David-class torpedo boat, possibly CSS David herself, taken after the fall of Charleston in 1865. The David was designed to operate low in the water like a submarine and carry a spar torpedo that would be detonated under Union warships. She attempted to break the Union blockade of Charleston by sinking the USS New Ironsides, USS Memphis, and USS Wabash, but failed to sink any enemy warships.

Library of Congress photo by Selmar Rush Seibert