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Kilo (class) / (Project 877 Paltus)

Diesel-Powered Attack Submarine [ 1982 ]

Though entering service in 1982, the Kilo-class is still in use by the Russian Navy among other operators world-wide.

Authored By: Staff Writer | Last Edited: 10/22/2021 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site.

The Kilo-class submarine was laid down by the Central Design Bureau for Marine Engineering and officially commissioned in April of 1982. 57 total vessels of the class were ultimately completed and 47 remain in active service as of this writing (September 2013). Two have been formally retired from service while a single boat was lost. The Kilo-class replaced the outgoing Tango-class boats while the Kilo-class itself was succeeded by the Lasa-class series. The boats have been exported beyond Soviet/Russian territories and have served with Algeria, China, India, Iran, Poland, Romania and Vietnam. The class is designed primarily for anti-ship/anti-submarine duties.

Design-wise, the Kilo-class displaces at 2,300 tons when surfaced and nearly 4,000 tons when submerged. She features a running length of up to 74 meters with a beam measuring 9.9 meters and a draught of 6.5 meters. The vessel has been tested to depths of 300 meters while oeprational service is typically at 240 meters. The Kilo-class is outfitted with a conventional powerplant arranged as a diesel-electric configuration. This includes 2 x diesel generators outputting 1,000kW of power and tied to 1 x motor delivering up to 6,800 shaft horsepower to a single, multi-bladed, fixed-pitch propeller held along a shaft at the stern. This arrangement allows the vessel a to surfaced speed of 12 knots with a submerged speed nearing 25 knots. Operational range is approximately 7,500 miles when cruising at seven knots along the surface. Range is reduced when submerged to 400 miles heading at 3 knots. The Kilo-class holds enough stores to supply a crew up to 45 days at sea before replenishment is required. Her crew consists of 52 personnel made up of officers and sailors.

As an attack submarine, the craft is outfitted with 6 x 533mm torpedo tubes with 18 x torpedo reloads. Some versions are outfitted further with the Club S anti-ship missile system. The craft can also disperse up to 24 naval mines if required (in place of the torpedo load). Russian variants are defensed on the surface through 8 x SA-N-8 "Gremlin" or 8 x SA-N-10 "Gimlet" surface-to-air missile systems.

The modern Russian Navy is believed to operate some 17 Kilo submarines today (2013). China, India and Vietnam represent the next largest operators with 12, 10 and 6 respectively. In the Russian Navy nomenclature, the Kilo-class is recognized as "Project 877 Paltus", Paltus meaning "Halibut".©MilitaryFactory.com
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Algeria; China; India; Poland; Iran; Romania; Russia; Soviet Union; Vietnam
Operators National flag of Algeria National flag of China National flag of India National flag of Iran National flag of Poland National flag of Romania National flag of Russia National flag of the Soviet Union National flag of Vietnam
Soviet Union
National Origin
Commissioned, Active
Project Status
Hull Class
Unnamed (B-248); Chita (B-260); Vyborg (B-227); Unnamed (B-229); Unnamed (B-404); Novosibirsk (B-401); Vologda (B-402); Tyumenskiy Komsomolets (B-405); Unnamed (B-351) / Orzel (291); Unnamed (B-801) / Delfinul (581); Sindhugosh (S55); Sindhudhvaj (S56); Unnamed (B-470); Unnamed (B-806); Rais Hadj Mubarek (012); Unnamed (B-439); Sindhuraj (S57); Rais Hadj Slimane (013); Sindhuvir (S58); Svyatoi Nikolai Chudotvorets (B-445); Sindhuratna (S59); Sindhukesari (S60); Yaroslavl (B-808); Komsomolsk Tadjikistana (B-394); Kaluga (B-800); Sindhukirti (S61); Ust'-Kamchatsk (B-464); Vledikavkaz (B-459); Sindhuvijay (S62); Alrosa (B-871); Magnitogorsk (B-471); Ust'-Bolsheretsk (B-494); Tareg (901); Unnamed (B-187); Lipetsk (B-177); Krasnokamensk (B-190); Noor (902); Mogocha (B-345); Yuan Zhend 64 Hao (364); Yuan Zhend 65 Hao (365); Yunes (903); Sindhurakshak (S63); Sindhushastra (S64)

Submerged Attack
Traveling under the surface to search, track, and / or engage or reconnoiter areas.
Maritime Patrol
Active patroling of vital waterways and maritime areas; can also serve as local deterrence against airborne and seaborne threats.
Fleet Support
Serving in support (either firepower or material) of the main surface fleet in Blue Water environments.

242.8 feet
(74.00 meters)
32.5 feet
(9.90 meters)
21.3 feet
(6.50 meters)
Displacement (Submerged)

2 x Diesel generators developing 1,000kW output with 1 x Motor generating up to 6,800 shaft horsepower while driving 1 x shaft.
12.0 knots
(13.8 mph)
Surface Speed
25.0 knots
(28.8 mph)
Submerged Speed
6,517 nm
(7,500 miles | 12,070 km)
1 knot = 1.15 mph; 1 nm = 1.15 mile; 1 nm = 1.85 km

Varies by nation and can include any of the following:

6 x 553mm torpedo tube launchers (18 torpedoes) OR 24 x Naval mines.
8 x SA-N-8 "Gremlin" surface-to-air missiles OR 8 x SA-N-10 "Gimlet" surface-to-air missiles
"Club S" surface-to-surface cruise missiles


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Image of the Kilo (class) / (Project 877 Paltus)
Image from the Russian Ministry of Defense; Public Release.
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Image of the Kilo (class) / (Project 877 Paltus)
Image from the Russian Ministry of Defense; Public Release.
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Image of the Kilo (class) / (Project 877 Paltus)
Image from the United States Department of Defense imagery network.

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