So far as ocean-going marine transport employing normal types of ships is concerned, the principle of the marine propeller will continue to suffice to enable the maximum speeds required to be achieved, with an efficiency that is always higher than that of water-jet propulsion.
Okwangoku njengokuba inqanawa zorhwebo zelizwe xa zizonke zothutho ezihamba unxweme ziqesha intlobo ntlobo zeenqanawa eziqhelekileyo, umthetho womqhubi wenqanawa zorhwebo zelizwe xa zizonke uyaqhubekeka ukonela ukunceda inani elingaphezulu lezantya ekufuneka ziphunyezwe, ngempumelelo esoloko ingaphezulu kwale yenqwelo moya yamanzi eqhutyelwa phambili.