Because of the sideways force exerted by the propeller there is always a tendency for the right-handed single-screw ship to turn to port when going ahead.
Ngenxa yonyanzelo lwendlela esecaleni ezisetyenziswa ngabaqhubi soloko kukho utyekelo lwesandla sasekunene isikrufu esinye senqanawa sokujika kwizibuko xa ihamba ngaphambili.