One class of aircraft carriers in the Royal Navy was fitted with triple screws, one each side and one on the centre line immediately before the rudder.
Iklasi enye yenqwelo moya abathwali kumkhosi wamanzi zifakwe ngezikrufu ezintlu-ntathu, kwicala ngalinye kumgca osesazulwini kwangoko nangoko phambi komphini.