Maritime Terminology

Metacentric Height (GM)

Metacentric Height (GM)

Definition

A measure of a vessel’s initial stability — the distance between the center of gravity (G) and the metacenter (M); positive GM indicates stable vessel, negative indicates unstable

Exam Relevance

This term is tested in DG Shipping MEO Class 4 orals, 2nd Mate FG assessments, and STCW competency evaluations. Ensure you can define, apply, and give an operational example.

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