The chapter “Nomenclature of Naval and Oceanic Engineering” introduces the fundamental terminology used in naval and ocean engineering, essential for the design, construction, and operation of marine vessels and offshore structures. It describes the main structural components of a ship—such as the hull, bow, stern, deck, bulkheads, rudder, propeller, and keel—along with their reinforcing elements and functional roles in ensuring structural integrity and seaworthiness. The chapter also explains the six degrees of freedom that characterize a ship’s motion at sea (heave, sway, surge, roll, pitch, and yaw), distinguishing between linear and rotational movements. This technical vocabulary forms the foundation for clear and precise communication among naval engineers, designers, and offshore operators.