Cb = V/(L x B x T), where V is the total underwater volume of the ship, L is the waterline length of the ship, B is the breadth of the ship and T is the draft of the ship. The block coefficient gives a crude indication of the underwater shape of the ship, with low values implying that the ship is shaped for speed at the expense of useable space, and high values implying a slow vessel concerned more for maximising useable internal space than for speed (note - this is a rule-of-thumb). A block coefficient of 1 would indicate that the ship was a rectangle, without any underwater shape. Modern super tankers have block coefficients above 0.9 and container ships (fast merchant ships) are around 0.65.
Cb = V/(L x B x T), apho u-V angumthamo wenqanawe opheleleyo wangaphantsi kwamanzi, u-L ububude bokuthi xhaxhe bokuma kwamanzi benqanawe. U-B ubububanzi benqanawe, aze u-T abe yi-drafti yenqanawe. Iblock coefficient inika umboniso ontlaka-ntlaka wokumila kwenqanawe phantsi kwamanzi. Iblock coefficient ka-1 iya kubonisa ukuba inqanawe yayime okoxande, ngaphandle kokumila kwaphantsi kwamanzi. Iinqanawe ezinkulu zine 'block efficient' engaphezu ko-0,9, ngelixa inqanawe zemithwalo (iinqanawe ezikhawulezayo zokuhambisa iimpahla zorhwebo) zimalunga no-0,65.