Armed with SLBM-SS-N-23 Skiff missiles and 21"and 25'6" torpedo tubes. Displacement 10.750 tons surfaced and 12.150 tons submerged with dimensions "544'6" x 39'4" x 28'5". Speed 19 knots surfaced and 24 knots submerged. The operational diving depth of Delta IV is 320 m with a maximum depth of 400 m. The 7 Delta IV project 667BDRM, Delfin SSBN submarines were built at Severodvinsk. Their base is the Saida Guba Naval base as part 12th squadron of the Russian Northern Fleet. The class existed of the
Verkhotury (K 51), laid down 23 February 1981, launched 7 March 1984 and commissioned 28 December 1984.
Ekaterinburg (K 84), laid down 17 February 1981, launched 17 March 1985 and commissioned 30 December 1985.
The ? (K 64), laid down 18 December 1982, launched 2 February 1986 and commissioned 23 December 1986. She was rebuilt as a platform for special operations.
Tula (K 114), laid down 22 February 1984, launched 22 January 1987 and commissioned 30 October 1987
Bryansk ( K117), laid down 20 April 1985, launched 8 February 1988 and commissioned 30 September 1988.
Karelia (K 18), laid down 7 February 1986, launched 2 February 1989 and commissioned 10 October 1989.
Novomoskovsk (K 407), laid down 2 February 1987, launched 28 February 1990 and commissioned 27 November 1990.
