A new nuclear submarine just made its first dive after being commissioned for the Royal Navy. The 8,100-ton HMS Agamemnon successfully submerged near BAE Systems’s facility in Barrow, Cumbria. The ...

Nuclear submarines carry out multiple types of missions, but no matter the mission, it's vital that they remain hidden in the ocean's depths.

Ukraine’s domestic security service, the SBU, said Monday that it had carried out an attack on a Russian submarine in the Black Sea port of Novorossiysk, causing critical damage to the vessel and ...

As it tried to demonstrate its continuing ability to fight, Ukraine said it had used drones to inflict serious damage on a Russian Kilo-class submarine at a Black Sea port. By Maria Varenikova ...

From logistical hurdles to budgetary issues and delivery delays, the ambitious project is facing a spate of tests that could determine its ultimate fate.

US Secretary of Defense Pete Hegseth said Wednesday that a US submarine sank an Iranian warship in international waters after Sri Lanka’s Navy said it rescued more than two dozen people from an ...