Maritime Glossary
Stability
Also known as: ship stability, GM, metacentric height, GZ curve
A ship's ability to return to an upright position after being heeled by an external force.
Status: ActiveVerified: Source confidence: high (96%)
Full Definition
Intact stability is governed by the metacentric height (GM): a positive GM means the ship rights itself when heeled; insufficient GM increases capsizing risk. The GZ curve (righting lever versus angle of heel) defines the range of stability. The International Code on Intact Stability (2008 IS Code) sets minimum GM and GZ criteria for all ship types. Damage stability requirements (SOLAS Chapter II-1) specify the ability to survive specified damage scenarios. Cargo loading computers (loading instruments) calculate GM, shear force, and bending moment in real time.
Domain Tags
seamanshipengineeringsafety