Kammala jumla mai zuwa: Yuan ya kasance mai tunani ne na teku, yana ƙoƙari da yawa na binciken teku. Bayan mamayewar Mongol na Japan (1274, jirgi 900, kuma a cikin 1281, jirgi 4400), mamayewar Mongol na Champa (1282),
mamayewar Mongol na Java (1292, jirgi 1000), a cikin 1291 Yuan yayi ƙoƙari amma a ƙarshe bai ci gaba da mamaye tsibirin Ryukyu ba. Duk da haka, babu ɗayan waɗannan mamayewar da suka yi nasara. Kublai yayi tunanin kaddamar da mamayewa na uku na Japan amma an tilasta masa komawa baya saboda tsananin rashin amincewar jama'a. An bayyana ci gaban ruwan ruwan zamanin Yuan a matsayin magaji na nasarorin daular Song da kuma abin da ya gabata na jiragen ruwa na Ming. Wani muhimmin aiki na sojojin ruwan Yuan shi ne jigilar hatsi daga Kudu zuwa babban birnin Beijing na zamani. Akwai mummunar gwagwarmayar shekaru 50 tsakanin rundunonin jiragen ruwa da ke jigilar kayayyaki ta hanyar Grand Canal da kuma jigilar kayayyaki ta hanyar Bahar Rum, wanda ya ƙare da mamayar Grand Canal a China har zuwa zamani. Har ila yau, hare-haren da ba su yi nasara ba sun nuna rashin ƙarfi na Mongols <unk> rashin iyawar hawa jiragen ruwa na nasara.