Group : Ballistic Submarines
Status : Retired - No Longer Operational
Also Known As : Delta I, Murena
Origin : Russia
Initial Operational Capability (IOC) : 1973
Total Production : 18

The Project 667B (Delta Class NATO designation) is the second generation of Project 667A (Yankee Class NATO designation) strategic submarines of which 34 units were produced with the first boat entering service in 1967. Their nuclear propulsion provides outstanding performance over conventionally-powered submarines as well as longer endurance while submerged. The first Project 667B boat was commissioned in 1973 and since then 43 boats were commissioned for the Russian/Soviet Navy.

The Project 667B, Murena Soviet designation and Delta I NATO designation, are an stretched variant of project 667A submarine design. They were equipped with 12 single warhead R-29 ballistic missiles and four 533mm torpedo tubes. The first boat entered service in 1973. The Soviet Navy commissioned 18 Delta I submarines through 1978. All these ships have been decommissioned.

Group : Ballistic Submarines
Status : Retired - No Longer Operational
Also Known As : Delta II, Murena-M
Origin : Russia
Initial Operational Capability (IOC) : 1975
Total Production : 4

The Project 667B (Delta Class NATO designation) is the second generation of Project 667A (Yankee Class NATO designation) strategic submarines of which 34 units were produced with the first boat entering service in 1967. Their nuclear propulsion provides outstanding performance over conventionally-powered submarines as well as longer endurance while submerged. The first Project 667B boat was commissioned in 1973 and since then 43 boats were commissioned for the Russian/Soviet Navy.

The Project 667BD, Murena-M Soviet designation and Delta II NATO designation, was developed to increase the number of ballistic missiles carried by the Soviet submarines from 12 to 16. The first Delta II submarine entered service in 1975 followed by three additional boats adding up to four submarines. The submarine is armed with 16 R-29D SLBMs, four 533mm torpedo tubes and two 400mm torpedo tubes. All of these ships have been decommissioned as of January 2004.

Group : Ballistic Submarines
Status : Active
Also Known As : Delta III, Kalmar
Origin : Russia
Initial Operational Capability (IOC) : 1976
Total Production : 14

The Project 667B (Delta Class NATO designation) is the second generation of Project 667A (Yankee Class NATO designation) strategic submarines of which 34 units were produced with the first boat entering service in 1967. Their nuclear propulsion provides outstanding performance over conventionally-powered submarines as well as longer endurance while submerged. The first Project 667B boat was commissioned in 1973 and since then 43 boats were commissioned for the Russian/Soviet Navy.

The development of Project 667BDR, Kalmar Russian designation and Delta III NATO designation, began in 1972 with the first boat entering service in 1976. It was equipped with 16 RSM-50 (R-29R) ballistic missiles carrying three nuclear warheads each. The R-29R was the first MIRVed SLBM introduced by the Soviet Union. The Soviet Navy commissioned 14 boats, the last one in 1982.

Currently, the Russian Navy operates six Delta III ballistic submarines. It is expected that sooner two or more of these ships are decommissioned due to aging. By 2010, the remaining ships could be replaced by the Borey-class submarines with the first boat joining the Russian fleet in 2006.

Group : Ballistic Submarines
Status : Active
Also Known As : Delfin, Delta IV
Origin : Russia
Contractor : Sevmash
Initial Operational Capability (IOC) : 1985
Total Production : 7

The Project 667B (Delta Class NATO designation) is the second generation of Project 667A (Yankee Class NATO designation) strategic submarines of which 34 units were produced with the first boat entering service in 1967. Their nuclear propulsion provides outstanding performance over conventionally-powered submarines as well as longer endurance while submerged. The first Project 667B boat was commissioned in 1973 and since then 43 boats were commissioned for the Russian/Soviet Navy.

The Project 667BDRM, Delfin Russian nickname and Delta IV NATO-designation, class nuclear-powered submarines are the last member of the successful Project 667 family started in the 1960s. They were designed to perform strategic deterrence patrols carrying 16 RSM-54 ballistic missiles with 4 nuclear warheads each. Four 533mm torpedo tubes have been provided for ship self-defense launching torpedoes and missiles.

The first Delfin-class submarine entered service with the Soviet Navy in 1985. A total of 7 Delfin-class submarines were procure between 1985 and 1992. These submarines will remain in service well into the 21st century depending upon successor availability. They are the quietest strategic submarines currently in service with the Russian Navy and six boats remain in service as of January 2004.