French submarines are naval vessels designed for underwater operations, primarily used by the French Navy. They play a crucial role in national defense, intelligence gathering, and deterrence. These submarines can be powered by nuclear energy or conventional diesel-electric systems, allowing them to operate for extended periods without surfacing. The most notable class of French submarines is the Triomphant-class, which includes four nuclear-powered ballistic missile submarines. These submarines are equipped with advanced technology, including stealth capabilities and long-range missile systems, ensuring that France maintains a credible nuclear deterrent in the global arena.