This is the distance from the baseline (Z=0) to the vertical position of the centre of gravity of all of the hull weights. This value is obtained from a weight study (see the Weights program) of the boat which identifies all of the weight items (hull, joinery, machinery, etc.) that make up the boat. This is a very important number which affects the motions and stability of the boat.
Lo ngumgama ukusuka kumgca wesiseko (Z=0) ukuya kwindawo ethe nkqo yombindi wombizane womhlaba wabo bonke ubunzima besiqu senqanawe. Eli xabiso lifumaneka kuphononongo lobunzima (jonga ku-the Weights program) besikhephe obalatha zonke izinto zobunzima. Eli linani elibaluleke kakhulu nelichaphazela intshukumo nozinzo lwesikhephe.