Borei-class submarine

The Borei class is a series of Russian nuclear-powered ballistic-missile submarines designed to carry Bulava submarine-launched ballistic missiles. It forms a sea-based component of Russia’s strategic nuclear forces.

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R-30 Bulava: A Russian submarine-launched ballistic missile designed for deployment from Borei-class submarines. The class was built around carrying and launching this missile.
Project 955 Borei: The original design program for Russia’s Borei-class nuclear ballistic-missile submarines. This project established the class’s initial design and construction program.
Nuclear triad: A state’s nuclear forces divided among land-based missiles, aircraft, and submarine-launched missiles. Borei submarines provide the maritime leg of Russia’s nuclear triad.
Ohio-class submarine: A United States Navy class of nuclear-powered ballistic-missile submarines that forms a central part of U.S. nuclear deterrence. It is the closest U.S. counterpart to Borei in strategic role.
Nuclear submarine: A submarine powered by a nuclear reactor, which can provide propulsion and onboard electricity. Nuclear propulsion lets Borei boats remain submerged for extended patrols.
Project 955A Borei-A: An improved variant of the Borei-class submarine with design changes intended to enhance performance and reduce detectability. Later boats use this refined version of the class.
Ballistic missile submarine: A submarine designed to carry and launch ballistic missiles, especially nuclear-armed weapons. Borei is a modern example of this strategic submarine type.
Columbia-class submarine: A planned United States Navy class intended to replace the Ohio-class ballistic-missile submarines. It represents the next-generation U.S. approach to a sea-based nuclear force.
Submarine-launched ballistic missile: A ballistic missile designed to be launched from a submarine, usually against distant land targets. Bulava belongs to this weapon class, which defines the submarine’s strategic role.
Dmitry Donskoy: A Russian nuclear-powered ballistic-missile submarine, originally built as a Typhoon-class vessel and converted to test Bulava missiles. Its missile trials helped prepare the Bulava system later carried by Borei boats.