Ship Buoyancy — Displacement, Stability & Metacentre

🚢 Ship Buoyancy — Displacement, Stability & Metacentre Maritime

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Hull Geometry

Beam (width) 20 m

Draught (depth) 6 m

Hull Height 12 m

Cargo Load 50%

Stability Test

Heel Angle 0°

Presets

Statistics

Displacement—

GM (metacentric ht.)—

Roll Period—

Righting Lever GZ—

Stability—

Physics: F_b = ρ·V·g. Equilibrium when F_b = W. GM = BM − BG where BM = I/V (second moment of waterplane / displaced volume). GM > 0 → stable; GM < 0 → capsizes. GZ = GM·sin(θ) is the righting lever.

Side view with waterline, centre of buoyancy B (blue), centre of gravity G (red), metacentre M (green)

GZ Righting Arm Curve (righting lever vs heel angle)