The Tench-class is a series of submarines used by the Royal Navy of the United Kingdom. Designed in the late 1950s, these submarines were primarily intended for anti-submarine warfare and reconnaissance missions. They are known for their distinctive teardrop shape, which enhances their hydrodynamic efficiency. These submarines were equipped with advanced sonar systems and torpedoes, making them effective in their roles. The Tench-class submarines were built in several variants, with improvements made over time to enhance their capabilities. They played a significant role during the Cold War, contributing to the NATO alliance's maritime defense strategies.