English English Wikipedia has an article on:prismatic coefficientWikipedia Noun prismatic coefficient (plural prismatic coefficients) (nautical, engineering) The ratio between the total submerged volume of a ship's or boat's hull, on the one hand, and the product of the length of the submerged portion of the hull with the area of the largest cross-sectional slice of the submerged portion of the hull, on the other. Coordinate terms block coefficient midship coefficient waterplane coefficientWikiwand - on Seamless Wikipedia browsing. On steroids.