Before revision: The block coefficient of a ship is calculated as the ratio of the underwater volume of the ship 's hull (peach)to the volume of a rectangular block of the same length, width and height .
After revision: The volume of a ship is calculated as the ratio of the underwater volume of the ship 's hull below the waterline (solid), divided by the volume of a rectangular solid (lines) of the same length, height and width, determine a ship's block coefficient .