This equals the quantity of water displaced and as the kilogram is the unit of mass and 1000 <kg = 1 tonne this is the unit which is used when referring to the size of a ship.
Oku kulingana nobuninzi bamanzi ashenxisiweyo nanjengokuba ikhilogram iyiyunithi yesambuku. Iikhilogram ezili-1000=itoni enye, le yiyunithi esetyenziswa xa kubhekiswa kubukhulu benqanawe.