This resulted in larger, high-freeboard ironclad frigates or battleships the British dubbed "centre battery ships" and the French "casemate" or "barbette" (if the citadel was circularly shaped) ships, which were oceangoing, unlike the American originals (excepting the Confederacy's , the only Confederate high-freeboard and oceangoing barbette/casemate ironclad, and the Union's rather unusual low-freeboard, but equally oceangoing, casemate ironclad ).
This resulted in larger, high-freeboard ironclads with a higher freeboard that were called "centre battery ships" by the British and "casemate" or "barbette" by the French. These were seaworthy vessels unlike the American originals (except for the Confederacy's , the only Confederate high-freeboard and oceangoing barbette/casemate ironclad, and the Union's rather unusual low-freeboard, but equally seaworthy, casemate ironclad ).