BM - from Waterline Inertia

Transverse metacentric radius BM from transverse moment of inertia of waterplane divided by displaced volume - fundamental stability geometry.

BMInertiaWaterplane

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Formula, assumptions, and limits

BM = I_T / \nabla

Symbol	Meaning	Unit
$I_T$	Transverse moment of inertia of WL	m⁴
$\nabla$	Displaced volume	m³

Source: Rawson & Tupper Vol 1

Transverse metacentric radius BM from transverse moment of inertia of waterplane divided by displaced volume - fundamental stability geometry.