At the present time experiments in the use of sails for ship propulsion are mainly taking place on small tankers, since masts and sails interfere least with the handling of cargo on this class of ship.
Kwixesha esikulo imifuniselo ekusetyenzisweni kweeseyile kwinqanawa eziqhutyelwa phambili ziyenzeka kwinqanawa zokuthutha ipetroyile ezincinci, ngenxa yeemasti kwakunye neeseyile zibandakanyeka kancinci ngokuphathwa kwemithwalo ethuthwayo kule klasi yenqanawa.