Marine mageesel injunan injunan injunan zafi, tattalin arziki mai kyau, mai sauqi farawa, da babban dacewa ga nau'ikan jiragen ruwa daban-daban. Bayan gabatarwar su, da sauri sun kai da sauri a matsayin babban ikon da ke kan jiragen ruwa. A shekarun 1950s, injunan Diesel sun kusan maye gurbin injunan Steam gaba daya a cikin sabbin jiragen ruwa na farar hula kuma a yanzu haka suna da jiragen ruwa na farar hula, da kuma jirgin ruwa mai matsakaici. Dangane da rawar da suka taka a cikin jiragen ruwa, ana iya rarrabe su a matsayin manyan injuna da injunan taimako. Ana amfani da manyan injuna don jigilar kayayyaki, yayin da injunan AUXIZAT, ko kuma matattarar ruwa, da kuma injunan ruwa, da injunan dizal.
Manufar injin din na duniya na duniya sun hada da Deutz daga Jamus), Cummins, Volvo, Jafananci, Jamus, Jafan Yankmar