steam turbine ships, where the propulsion power is usually (but not invariably) higher than 20,000 kW, so that in the main these are large, fast ships;
Kwinqanawa ezine-injini ezijikeleziswa ngumsinga womphunga, apho amandla okuhamba (kodwa hayi ngokungaguqu-guqukiyo) kangangamashumi amabini amawaka ukuphakama, ukuze ezi zibe zezinkulu nezikhawulezayo iinqanawa.