Largest Submarine : Typhoon, 170 m, Russia.
Russia has 128 submarines of which 91 are nuclear powered.

USA has 74 nuclear powered submarines. Of the 12 US Aircraft carriers, 10 is nuclear powered. First nuclear powered US Aircraft carrier is USS Nimitz. USS Enterprise : Length 335.2 metre, 32 knots speed, 3325 crew, 99 aircrafts on board. World's largest Air Force & Navy - USA.

First nuclear submarine - Nautilus, USA.

India has 19 submarines of whch none is nuclear powered. In 1988, India has leased a nuclear submarine - INS Chakra from Russia - later returned it.

More than 80 % of the power comes from nuclear reactors in developed countries.