On September 6, North Korea launched the first missile submarine, Hero Kim Gun Ok, fully equipped with tactical nuclear weapons. Currently, the new submarine is preparing to go to sea for a test voyage, technical details have not been reported. Presumably, the submarine was created on the basis of analogues of the Chinese diesel-electric torpedo submarines of Project 033, previously built in the DPRK, this is a licensed copy of the submarines of the Soviet Project 633. The submarine has a two-shaft design similar to the submarines of Project 633. The submarine is equipped with a missile compartment with ten missiles silos for nuclear ballistic missiles. North Korean leader Kim Jong-un said that the country has made significant progress in the development of the shipbuilding industry. All commanders of the submarine vowed to glorify the DPRK Navy.