| | Large rescue submarine
Project 940 LenokNATO:
India Ñlass
Completed 2
units
Ships Shipyard named after
Leninskogo komsomola, Komsomolsk-on-Amur
| Name |
Yard ¹ |
Laid Down |
Launched |
Commissioned |
Note |
| S-486 |
¹194 | 22.02.1974 |
7.09.1975 | 30.06.1976 | from
3.08.1977 - BS-486, from 9.06.1980 - BS-486 Komsomolets Uzbekistana, from 15.02.1992
- BS-486 | | S-257 |
¹195 | 23.02.1978
| 27.05.1979 |
1.09.1979 | from 3.08.1977
- BS-257 |
General characteristics
- Project 940
| Displacement (tons): | | Surfaced: | 3950 |
| Submerged: | 5095 |
| Dimensions (m): | | Length: | 106 |
| Beam: | 9,7 |
| Draught: | 7,4 | | Speed
(knots): | | Surfaced: | 12,5 |
| Submerged: | 15 |
| Range: | | Surfaced: | 5000
nmi (12,5 knots) | | Under snorkel: | - |
| Submerged: | 85 nmi (4 knots) |
| Diving depth (m): | | Operational: | 240 |
| Maximum: | 300 |
| Endurance (days): | 45 |
| Propulsion: | 2x4000 hp 1D43
diesels, 2x3550 hp PG-14 electric motors1, 2x190 hp PG-104 electric motors, 2õ50
hp PG-103K electric motors, 2 fixed pitch propellers in nozzles, 1 bow and 1 stern
thrusters, 1x1300 kW 2D42 diesel-generator | | Armament: | 2
Project 1837 rescue submersibles
1 diving complex (2 pressure chambers) – 300
m | | Electronics: |
MRK-50 Kaskad radar complex, Nakat ESM Radar system, Khrom-KM IFF, MG-10M2 Kola
noise detection sonar, Plutoniy mine detection sonar, 2 MGA-5 underwater communications
systems (then Krilyon), MGA-1 underwater communications system, MGV-55 underwater
communications system, MG-15 Sviyaga, MG-25, Gamma-P, MG-23, Most navigation complex |
| Complement: | 94 (17 officers) |
Schematics 
Large rescue submarine - Project 940
Modernizations
Nakat ESM Radar system was replaced by MRP-25
Khrom-KM IFF was replaced by
Parol`-301
Plutoniy mine detection sonar was replaced by MG-519 Arfa-M
Added MGA-19 Krilyon sonar
Additionally equipped for maintenance of work with
Project 1837K, Project 1839, Project 1855, Project 18270
Fleets Northern Fleet: S-257
Pacific Fleet:
S-486
Hull Numbers S-257: 223,
435(1991), 417(1997)
S-486: 511(1977)
Decommissioned 1994
– S-486 (17.12)
1999 – S-257
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