This term normally refers to [x,y,z] points which define the intersection of waterlines and buttocks with each station of the hull. These points can then be organized into an "offsets table". X is the station location, Y is the half-breadth, and Z is the height of the offset.
Eli gama liqhele ukusetyenziswa kwiindawo ezingu [x, y, z] echaza unqamlezo lwendlela zamanzi neempundu kwindawo nganye yesiqu senqanawe. Ezi ndawo zingaphinde zilungiswe zibe "luluhlu olulungileyo". U-X yindawo yokuhlala, u-y sisiqingatha sobubanzi, aze u-Z abe bubude bomlinganiso.