block coefficient: a standalone construct

In naval architecture, the block coefficient is the ratio of a hull's submerged volume to the volume of the rectangular box that just encloses it, defined by the waterline length, the beam, and the draught. It expresses how full or fine the underwater body is: a value near one describes a boxy, full form like a bulk carrier, while a low value describes a fine, slender form like a fast warship or yacht, and the choice trades cargo volume against resistance and speed. Rawson and Tupper's Basic ship theory defines it alongside the related prismatic and waterplane coefficients. The referent is a dimensionless fullness measure of the submerged hull.[1][2]

Unit

Dimensionless ratio of displaced volume to the enclosing length-by-beam-by-draught box

Recovery means

Not applicable

Measured by

Computed as displaced volume divided by the product of waterline length, beam, and draught