Sleek, black and rarely seen, submarines are the ultimate killing machine. Prowling the decks, their torpedoes can threaten any ship at sea, their missiles, any .\rbr\rbrCold War Submarines.\rbr\rbrSubmarine warfare is one of the four divisions of underwater warfare, the others being anti-submarine warfare, mine warfare and mine countermeasures.\rbr\rbrThis Royal Navy produced stock reel contrasts the RN versus the Soviet Navy, its chief perceived adversary in combat. The film begins with shots of different .