The Confederacy , in desperate need of ships , raised Merrimack .
The Confederacy , in desperate need of ships , rebuilt her as an ironclad ram , according to a design prepared by Lt. John Mercer Brooke , CSN .
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 .