Ship Damage Stability Lost Buoyancy Calculator

Calculate ship damage equilibrium via the Lost Buoyancy method: parallel sinkage, longitudinal trim, transverse list, and damaged metacentric height ($GM_{dam}$).

Intact Ship Hydrostatics

Displacement Δ (tonnes):

Intact Draft T_0 (m):

Waterplane Area A_WP (m²):

Intact GM_0 (m):

Trim Stiffness MTC (t·m/cm):

Freeboard to Deck (m):

Flooded Compartment Parameters

Flooded Volume v (m³):

Cut-Out Area a_wp (m²):

Arm from LCF (m): + Fwd, - Aft

Transverse Arm (m): 0 for centerline

Permeability μ: 0.85 machinery, 0.6 cargo

Post-Flooding Equilibrium & Margins

Damaged GM (GM_dam)

Parallel Sinkage (δT)

Change in Trim

Heel List Angle

Residual Freeboard

Damage Stability Assessment (SOLAS Ch. II-1)

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Ship Damage Stability Lost Buoyancy Calculator

Intact Ship Hydrostatics

Flooded Compartment Parameters

Post-Flooding Equilibrium & Margins

Frequently Asked Questions