The Midship Coefficient (Cm)

One issue that had never occurred to me, until Frank Fox pointed it out to me, is that using his system, a midship coefficient can be greater than 1.0. I had always assumed that the box used to compute the Cm would be drawn to touch the widest part of the hull, for the width. The height is the mean draft, and that remains undisputed. This becomes important for ships that are bulged. Frank Fox (probably correctly) draws the box, using the waterline beam as the width of the box. Thus, the bulges could protrude outside of this box. Frank Fox gives the Cp as 0.661 and the Cm as 1.021, while Garzke and Dulin give the Cp as 0.612 and the Cm as 1.121. The bulges don't seem to protrude enough to give a Cm as high as 1.121, so I am sure that 1.021 is accurate.