The principle is the same as that used for aircraft, excepting that the effect in water, which has a density 800 times that of air, is much higher.
Umthetho uyafana nowawusetyenziswa kwinqwelo moya ngaphandle nje kwento yokuba iziphumo emanzini, ezinolwazelo lwamakhulu asibhozo amaxesha omoya, aphezulu kakhulu.