Midship Coefficient (CM)

Compute CM from midship area, from CB & CP, via midship ordinates (Simpson), or sanity-check against typical ranges.

Rounds the two bottom corners.
Result

CM = —

Enter inputs to compute.
Report: Midship Coefficient (Direct)
—
—
Result

CM = —

Enter CB and CP.
Report: Midship Coefficient (From CB & CP)
—
—
Equal spacing from keel (z=0) to WL (z=T).
Result

AM (from ordinates) = — m²

CM = —

Enter B, T, levels & half-breadths.
Report: Midship Coefficient (Ordinates)
—
—
Typical Range

—

Use as a sanity check. Real values depend on hull form & draft.
Report: Midship Coefficient (Sanity Range)
—
—

Tip: Use moulded B and T at midship. CM should usually be between 0.85 and 1.00 for conventional ships.