Ericsson ya tsara USS'' Monitor'a shekara ta 1861.
Tabbas, wani nau'i mai rikitarwa na jumla shine "Ericsson ya tsara USS '' Monitor 'a 1861, mafi mahimmancin fasalinsa shine babban cylindrical gun turret wanda aka saka a tsakiyar jirgin sama sama da ƙananan jirgin sama na sama, wanda ake kira'' raft '. "