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 .\r<br>\r<br>Cold War Submarines.\r<br>\r<br>Submarine warfare is one of the four divisions of underwater warfare, the others being anti-submarine warfare, mine warfare and mine countermeasures.\r<br>\r<br>This 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 .
