Foxtrot-class submarine

The Foxtrot class was the NATO reporting name of a class of diesel-electric patrol submarines that were built in the Soviet Union. The Soviet designation of this class was Project 641.

The Foxtrot class was designed to replace the earlier Zulu class, which suffered from structural weaknesses and harmonic vibration problems that limited its operational depth and submerged speed. The first Foxtrot keel was laid down in 1957 and commissioned in 1958 and the last was completed in 1983. A total of 58 were built for the Soviet Navy at the Sudomekh division of the Admiralty Shipyard (now Admiralty Wharves), St. Petersburg. Additional hulls were built for other countries.

The Foxtrot class was comparable in performance and armament to most contemporary designs. However, its three screws made it noisier than most Western designs. Moreover, the Foxtrot class was one of the last designs introduced before the adoption of the teardrop hull, which offered much better underwater performance. Also, although the Foxtrot was larger than a Zulu Class Submarine, the Foxtrot Class had 2 of it's 3 decks dedicated to batteries that gave it a range of 10 days but adding weight making the Foxtrot's average speed a slow 2 knots. Due to the batteries taking up 2 decks, it meant that conditions were relatively small with space comparing to older submarines such as the much older American Balao Class Submarine. The Foxtrot class was completely obsolete by the time the last submarine was launched. The Russian Navy retired its last Foxtrots between 1995 and 2000, units were scrapped and disposed of for museum purposes. The last operational unit, Zaporizhzhia, served in the Ukrainian Naval Forces until it was surrendered to Russia on March 22, 2014, as part of the Russian annexation of Crimea.[4] Russia decided not to accept it due to its age and operational unsuitability.

Foxtrot-class submarine
Class Ship
Type Submarine
Manufacturer Sudomekh, Galerniy Island
Production Period 1957 - 1983
Origin Russia (USSR)
Country Name Origin Year
Russia (USSR) 1958
Country Name Operational Year Retirement Year
Cuba 1958 2000 View
India 1958 2000 View
Libya 1958 2000 View
Poland 1958 2000 View
Russia (USSR) 1958 2000 View
Ukraine 1958 2000 View
ManufacturerName Production From Production To Quantity
Sudomekh, Galerniy Island 1957 1983 74 View

Ships in Class 

Number Shipyard Laid down Launched Decommissioned Status
B-94 Yard 196 Leningrad Yard 03.10.1957 28.12.1957 01.10.1984 Decommissioned for scrapping
B-95 02.02.1958 25.04.1958 22.02.1980 Decommissioned for scrapping
B-36 29.04.1958 31.08.1958 24.08.1993 Decommissioned for scrapping
B-37 18.07.1958 05.11.1958 11.01.1962 sank after fire and multiple explosions
B-133 27.09.1958 26.01.1959 01.10.1983 renamed B-833
B-135 20.12.1958 30.03.1959 01.07.1977 -
B-139 25.02.1959 30.05.1959 01.10.1976 renamed B-839
B-116 09.06.1959 10.10.1959 28.09.1994 -
B-130 22.08.1959 17.12.1959 01.10.1988 -
B-85 23.12.1959 19.03.1960 19.04.1990 -
B-59 21.02.1960 06.06.1960 19.04.1990 -
B-156 20.04.1960 02.08.1960 19.04.1991 -
B-153 06.08.1960 31.01.1961 24.06.1991 renamed B-854
B-164 26.10.1960 02.08.1960 03.07.1992 -
B-33 03.02.1961 27.04.1961 24.06.1991 -
B-105 01.07.1961 01.10.1961 24.08.1993 -
B-169 17.08.1961 29.11.1961 19.04.1990 -
B-38 30.10.1961 31.01.1962 25.04.1989 -
B-53 08.01.1962 12.04.1962 19.04.1990 renamed B-853
B-50 07.03.1962 15.06.1962 03.07.1992 -
B-8 09.05.1962 21.07.1962 19.04.1990 -
B-31 18.08.1962 03.11.1962 24.06.1991 -
B-2 27.10.1962 25.01.1963 24.06.1991 -
B-55 22.01.1963 05.04.1963 03.07.1992 renamed B-855
B-98 04.04.1963 15.06.1963 2001 renamed 292 Wilk
B-101 19.06.1963 30.08.1963 30.06.1993 -
B-6 09.08.1963 30.11.1963 24.08.1994 -
B-103 14.12.1963 16.04.1964 24.06.1991 -
B-109 22.02.1964 17.06.1964 28.09.1997 -
B-107 18.04.1964 25.07.1964 04.08.1995 renamed B-807
B-112 19.06.1964 27.10.1964 19.04.1990 -
B-25 26.08.1964 22.12.1964 03.07.1992 -
B-205 17.06.1969 29.08.1969 31.01.1996 -
B-143 21.10.1959 17.02.1960 24.06.1991 -
B-15 10.10.1963 21.02.1964 29.10.1992 -
B-427 10.04.1971 22.06.1971 28.04.1994 Museum, Long Beach, California, USA
B-39 09.02.1967 15.04.1967 05.07.1994 Museum, San Diego,California, USA
B-440 01.06.1970 16.09.1970 1999 Museum, Russia
B-435 24.03.1970 29.05.1970 unknown as U-01 "Zaporizhiya" in the Ukraine
B-9 26.12.1964 31.03.1965 17.07.1997 -
B-4 14.06.1960 03.10.1960 24.06.1991 -
B-57 23.04.1959 15.08.1959 24.06.1991 -
B-7 14.04.1961 29.06.1961 19.04.1990 -
B-21 29.10.1964 16.02.1965 03.07.1995 renamed B-821, Museum, Zeebrugge,Belgium
B-26 06.05.1965 10.08.1965 24.06.1991 -
B-28 24.05.1965 10.08.1965 30.06.1993 -
B-34 13.08.1965 16.11.1965 24.06.1991 -
B-40 24.09.1965 16.11.1965 30.06.1993 -
B-29 25.03.1966 20.05.1966 2003 1988 renamed 293 Dzik
B-41 07.04.1966 20.05.1966 24.08.1993 -
B-46 13.08.1966 24.12.1966 30.06.1993 -
B-49 12.10.1966 24.12.1966 31.12.1993 Museum, Rochester, Kent, England
B-397 07.05.1967 22.08.1967 30.06.1993 -
B-400 29.05.1967 22.08.1967 24.09.1991 -
B-413 28.06.1968 07.10.1968 1999 Museum, Kaliningrad, Russia
B-416 18.07.1968 25.02.1969 03.07.1992 -
B-213 01.10.1969 20.01.1970 30.06.1993 -
B-409 18.12.1970 02.03.1971 30.06.1993 -

Class overview
Builders: Sudomekh, Leningrad
Operators:  Soviet Navy /  Russian Navy
 Libyan Navy
 Cuban Navy
 Indian Navy
 Polish Navy
 Ukrainian Navy
Preceded by: Zulu-class submarine
Succeeded by: Tango-class submarine
Built: 1957–1983
In commission: 1958–2000
Completed: 74
General characteristics
Type: Submarine
Displacement: 1,952 long tons (1,983 t) surfaced
2,475 long tons (2,515 t) submerged
Length: 89.9 m (294 ft 11 in)
Beam: 7.4 m (24 ft 3 in)
Draft: 5.9 m (19 ft 4 in)
Propulsion: 3 × Kolomna 2D42M 2,000 hp (1,500 kW) diesel engines
3 × Electric motors, two 1,350 hp (1,010 kW) and one 2,700 hp (2,000 kW)
1 × 180 hp (130 kW) auxiliary motor
3 shafts, each with 6-bladed propellers
Speed: 16 knots (30 km/h) surfaced
15 knots (28 km/h) submerged
9 knots (17 km/h) snorkeling
Range: 20,000 nmi (37,000 km) at 8 kn (15 km/h) surfaced
11,000 nmi (20,000 km) snorkeling
380 nmi (700 km) at 2 kn (3.7 km/h) submerged
Endurance: 3-5 days submerged
Test depth: 246–296 m (807–971 ft)
Complement: 12 officers, 10 warrants, 56 seamen
Armament: 10 × torpedo tubes (6 bow, 4 stern)
22 torpedoes

End notes