| The SS590 Oyashio | |
| Class overview | |
|---|---|
| Name: | Oyashio (おやしお, Cold Current) |
| Builders: | Kawasaki Shipbuilding Corporation, Mitsubishi Heavy Industries |
| Operators: |  Japan |
| Preceded by: | Harushio-class submarine |
| Succeeded by: | Sōryū-class submarine |
| Built: | 1994–2008 |
| In commission: | 1998– |
| Planned: | 11 |
| Completed: | 11 |
| Active: | 11 |
| General characteristics | |
| Type: | Submarine |
| Displacement: | 2,750 tons (surfaced) 4,000 tons (submerged) |
| Length: | 81.7 m |
| Beam: | 8.9 m |
| Draught: | 7.4 m |
| Propulsion: | Diesel-electric 2 Kawasaki 12V25S diesel engines 2 Kawasaki alternators 2 Toshiba motors 3,400 hp (2,500 kW) surfaced 7,750 hp (5,780 kW) submerged |
| Speed: | 12 knots (surfaced) 20 knots (submerged) |
| Complement: | 70 (10 officers) |
| Sensors and processing systems: |
Sonar: Hughes/Oki ZQQ-6 hull-mounted sonar, flank arrays, 1 towed array. Radar: JRC ZPS 6 I-band search radar. |
| Armament: | 6 × HU-605 21 in (533 mm) torpedo tubes with 20 reloads for: 1.) Type 89 torpedoes 2.) UGM-84 Harpoon |