This document discusses the classification and types of ships. It covers merchant ships such as general cargo vessels, tankers, bulk carriers, and container ships. It also discusses naval and coast guard vessels, recreational vessels, utility tugs, research and environmental ships, and ferries. Ships can be classified by their usage and by their support type, including aerostatic, hydrodynamic, hydrostatic, and submarine classifications. Common merchant ship types include general cargo, tankers, bulk carriers, and container ships, which vary in their cargo capacities and handling equipment.