The P Class Submarine refers to a series of submarines built for the Royal Navy during the early 20th century. These submarines were designed for coastal defense and were notable for their relatively small size and limited range. They typically featured a single hull and were equipped with torpedoes for offensive capabilities. The P Class submarines were primarily used during World War I and played a role in patrolling the waters around the British Isles. Their design focused on stealth and maneuverability, allowing them to operate effectively in shallow waters. Despite their limitations, they contributed to the development of submarine warfare tactics.