Russia’s new nuclear-powered submarine, the Imperator Alexander III, successfully fired a Bulava intercontinental ballistic missile, the Russian Defense Ministry said on Sunday..

The rocket, which the Federation of American Scientists says is designed to carry up to six nuclear warheadswas launched from an underwater position in the White Sea off Russia’s northern coast and hit a target thousands of kilometers away on the Kamchatka Peninsula in the Russian Far East, the Defense Ministry said.

“The launch of a ballistic missile is the last element of the state tests, after which a decision will be made on the cruiser’s inclusion in the Navy,” the ministry said in a statement.

The Imperator Alexander III is the seventh of the Russian Project 955 Borei (Arctic Wind) class nuclear submarines and the fourth of the modernized Borei-A variant, according to Russian sources.

They are known to NATO as Dolgoruky-class submarines, after the first vessel, the Yuri Dolgoruky, became the first of a new generation of nuclear submarines to be launched by Russia since the Cold War.