Nuclear submarines are advanced underwater vessels powered by nuclear reactors. This technology allows them to operate for long periods without needing to surface for fuel, making them ideal for stealthy military operations. They can travel at high speeds and dive to great depths, which enhances their ability to evade detection. These submarines are equipped with various weapons systems, including torpedoes and ballistic missiles, enabling them to carry out strategic missions. They play a crucial role in national defense, providing a powerful deterrent against potential threats while maintaining the ability to gather intelligence from beneath the ocean's surface.