| Russian Designator: | Project 641 |
| NATO Designator: | Foxtrot-Class |
| Manufacturer's Number: | b-39 |
| Commissioned: | 1974 |
| Decommissioned: | 1994 |
| Non-nuclear | |
| Length: | 284 |
| Beam: | 24 ft 7 in |
| Draft: | 20 ft |
| Displacement: | 1952 tons surfaced; 2475 tons submerged |
| Built: | Sudomekh Shipyard, Leningrad |
| Construction: | 3/8 in outer light hull comprising ballast tanks; 7/8 in OT28 Nickel Steel pressure hull |
| Complement: | 56 sailors, 10 midshipmen, 12 officers |
| Maximum Diving Depth: | 985 ft |
| Speed: | 16 knots surfaced; 15 knots submerged; 9 knots snorkelling |
| Range: | 20,000 miles surfaced at 8 knots; 11,000 miles snorkelling; 380 miles submerged at 2 knots |
| Endurance: | 3-5 days submerged |
| Propulsion: | 3 x
Kolomna 2D42M diesel engines, 2000 hp each 3 x electric motors, 2 x 1350 hp, 1 x 2700 hp 1 x auxiliary motor, 180 hp 3 x propeller shafts, 6 bladed propellers |
| Torpedoes: | 22 torpedoes (21"); 10 tubes (6 bow, 4 stern) |
| Radar: | Surface search: Snoop Tray: 1 band |
| Sonar: | Herkules medium frequency active/passive; Feniks passive search/attack |
| Electronic Warfare: | Stop
Light, radar warning; Quad Look Directional Finder |