From English Russia: "This is submarine 'Typhoon' as it was called in NATO documents or 'Shark' as it was called in Russia. It is considered to be the biggest submarine in the world, over 170 meters (515 feet) long and 23 meters (70 feet) wide. It can carry 20 ballistic nuclear missiles and there were only six of those submarines built. Only three left intact, but are staying now out of service with armament control according to the agreement between USSR and USA signed by M. Gorbachev."