The "P class" refers to a category of ships designed for specific purposes, often used in naval or maritime contexts. These vessels are typically characterized by their size, capabilities, and intended functions, such as patrol, research, or transport. The classification helps in organizing and managing different types of ships within a fleet. In some contexts, "P class" can also refer to a type of racing sailboat, known for its performance and agility on the water. These boats are often used in competitive sailing events and are designed to meet specific regulations and standards set by governing bodies like World Sailing.