Typhoon Class

Soviet-built Typhoons are the better submarines in the world, belief in at 48,000 bags (a U.S. Ohio-class ballistic missile sub weighs beneath than 20,000 tons, while an Arleigh Burke-class boner is alone about 9,000 tons).
Despite its size, the six Typhoons that were congenital were decidedly quiet and harder to detect. They agitated 20 SS-N-20 (NATO cipher name "Sturgeon") ballistic missiles able with assorted nuclear warheads, as able-bodied as anti-ship guided missiles and torpedoes. The boats featured assorted burden hulls for greater strength.

Type 7 U-boat

The Allies were advantageous that the Type XXI U-boat accustomed too backward to see combat. Had it been deployed afore the end of war, it could accept had a adverse appulse on the Battle of the Atlantic.
The Type XXI had abundant avant-garde appearance for its time, including high-capacity batteries that enabled it to abide underwater for days, a automated hull, and a snorkel to recharge the batteries while underwater. With an underwater acceleration of 17 knots, it could in fact outrace a lot of apparent warships.

George Washington Class

By the austere argumentation of the Cold War, submarines armed with cardinal nuclear missiles did abundant to accumulate the peace. Hidden beneath the ocean and acutely difficult to detect, the nuclear-powered ballistic missile abysmal (SSBN) was the absolute deterrent.
A abeyant antagonist knew that even if a abruptness nuclear advance wiped out land-based missiles and bombers afore they were launched, the SSBNs (or "boomers") would survive to retaliate.
The world's aboriginal SSBN was the USS George Washington, aboriginal ordered in 1957 and commissioned in 1959. Earlier Soviet subs had agitated nuclear-armed ballistic missiles, but they were diesel-powered boats with bound endurance.
The George Washington's nuclear propulsion enabled it to abide underwater for months after surfacing. Each of the 5 boats in the George Washington Class agitated 16 Polaris missiles, giving a individual abysmal the adequacy to demolish an opponent's heartland.