Ship classes refer to categories of ships that share similar design features, capabilities, and purposes. These classifications help in organizing naval vessels, making it easier to understand their roles within a fleet. Common ship classes include destroyers, aircraft carriers, and submarines, each designed for specific missions such as combat, support, or transportation. Each ship class is further divided into subclasses based on size, armament, and technology. For example, within the destroyer class, there may be guided-missile destroyers and frigates. This structured classification system aids in naval strategy, logistics, and training, ensuring that each vessel can effectively fulfill its intended role.