 Ramba uchiverenga ndima iyi - Pakati pezvinyorwa zvinonyanya kuzivikanwa zvina-funnels, yakanyura parwendo rwayo rwokutanga, uye, torpedoed, mukati meHondo Yenyika Yokutanga. Pamwe chete, ngarava gumi neshanu dzomumutsetse mina dzakabudiswa; Great Eastern muna 1858, uye dzasara pakati pa 1897 na 1922. Ina yakanyura mukati meHondo dzeNyika, uye dzimwe dzose kunze kweTitanic dzakaparadzwa. 