An ironclad frigate in 1854, a central-battery ship in 1861, as well as plans to convert wooden ships into ironclads in 1862.
Inqanawa ekhuselweyo enesantya ngo1854, inqanawa yebhethri esembindini ngo1861, kunye nezicwangciso zokutshintsha inqanawa yokhuni kwiinqanawa ezikhuselweyo ngamacangci entsimbi.