According to the International Institute for Strategic Studies (IISS), Russia has the world most dangerous submarine fleet, followed by China and South Korea.
The list includes seven Russian and two Chinese submarines, including the Kursk, which was built in the early 1970s.
According to a report by the Naval Research Laboratory, Kursks are the fastest-developing Russian submarine design.
The Kurska has been operational since the end of 2010.
The Chinese submarine was completed in 2012.
The Russian submarine was built at a time when Russia was building its own nuclear submarine, the Nudetes, which has yet to be launched.
The US Navy said it is currently evaluating the Krasnodar Submarine, which is being built in Georgia by Russia’s Rosoboronexport.
The two submarines have been based in Sevastopol since the 1960s, and were decommissioned in 2010.
According the IISS report, Russia has more than 20 nuclear-powered submarines, but is not included in the IISSS list due to its relatively small size and lack of advanced submarine technology.
The IISS also said the Korsu submarine has two nuclear reactors.
The other three are: the Tu-90S submarine, which Russia began construction of in 1991; the Tu, a Russian submarine with a nuclear reactor; and the Nodel submarine, a Type-95B surface-to-surface ballistic missile submarine.
Russia’s biggest threat to the IUSSS, according to the report, is its ballistic missile capabilities, with the ISS listing Russia as having the “third largest missile threat” to the United States.
According, Russia’s largest missiles are the Tu and the Tu90S, which have a range of 5,000 kilometers and 2,000 miles, respectively.
In its report, the IISC said the Tu has a nuclear warhead of 10,000 kilograms and has a range up to 6,000 km.
Russia has also launched the Tu30S and Tu90K missiles.
Russia is the only country to have two submarines built in Russia, which the Russian Defense Ministry said have a combined range of 1,000 to 2,500 kilometers.
Russia also launched its newest submarine, Tu-95S, in July.
The Tu-30S, a sub-hunting vessel that can reach depths of 100 kilometers, is the third sub to be built by Russia.
The new Tu-35, also named Tu-45, has a similar design, but was developed by Russia, the US, France and Israel.
The first two Tu-boats were launched in 2011.
The third, Tu30, was launched in 2013.
Russia continues to build its submarine force, the Russian defense ministry said.
It is currently building an upgraded Tu-105S, Tu90, Tu80, Tu75, Tu65 and Tu65-250 submarines, which are capable of carrying up to 40 submarines, according the Iiss report.
Russia said the new submarine force will be ready for delivery by 2020, and that it is in the final stages of the development of new submarine technology, including new propulsion systems and radar systems.
The construction of new submarines is the main focus of the Russian Navy’s modernization program, which also includes the acquisition of new aircraft carriers, warships and submarines.
Russia did not respond to a request for comment from Military Times.
The United States has the most dangerous sub fleets.
The U.S. Navy has five operational submarines.
The three nuclear-armed submarines are the USS John Paul Jones and USS Carl Vinson, both of which are deployed in the Western Pacific.
The four surface-based subs are the U.K.’s HMS Queen Elizabeth, the U, S, and VSS Enterprise, which were built in 1968 and 1969 respectively.
The fifth submarine, USS Enterprise, was built as a nuclear-independent sub in 1986.
The Navy has two submarines with nuclear weapons, the USS Freedom and USS Nitze.
The USS Freedom, the first of two U.N. subs built by the U and the Nitze, is currently on its final refit in Japan, the Navy said in a statement.
The Freedom is currently conducting exercises off the Korean Peninsula, and is scheduled to deploy to the U-band, an area that can only be accessed by ships in the UAM (United Nations AM Broadcast) band.
Nitze is also on its last refit.
The subs were originally built in 1958 and 1964, and each was armed with three nuclear warheads.
The ship, which can carry up to four nuclear weapons on board, is expected to enter service by 2020.
Russia and the United Kingdom are the only countries in the world that have submarines that can carry nuclear warheads, the Defense Department said in March 2016.
Russia launched its first submarine, Krasna, in April 2014.
The sub was built by Rosoborsk and is one