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Souryuu-class Submarine

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The Sōryū-class submarines (16SS) are diesel-electric submarines that entered service with the Japan Maritime Self-Defense Force in 2009. The design is an evolution of the Oyashio-class submarine, from which it can most easily be distinguished by its X-shaped tail planes. The Sōryūs have the largest displacement of any submarine used by post war Japan.

The class are fitted with air-independent propulsion based on Kockums Stirling engines license-built by Kawasaki Heavy Industries, allowing them to stay submerged for longer periods of time.

Specifications[edit]

  • Type: AIP equipped Diesel Electric Submarine (Hull designation symbol SS)
  • Service Period: 2009-Present
  • Characteristics:
    • Length: 275 feet 7 inches (84 meters)
    • Beam: 29 feet 10 inches (9.1 meters)
    • Draft: 27 feet 11 inches (8.51 meters)
    • Displacement: 3,200 tons (Surfaced); 4,630 tons (Submerged)
  • Crew: 65 (9 officers, 56 enlisted)
  • Propulsion: 2 x Kawasaki 12V 25/25 SB-type diesel engines diesel-electric, 4 x Kawasaki Kockums V4-275R Stirling engines, 1 shaft 3,900hp (2,900 kW) surfaced, 8,000hp (6,000 kW) submerged
  • Range: AIP Endurance: 6,100 nautical miles (11,297 kilometers) at 6.5 knots (12.04 km/h)
  • Speed (Submerged): 20 knots (37.04 km/h)
  • Speed (Surfaced): 13 knots (24.08 km/h)
  • Sensor Suite:
    • ZPS-6F surface/low-level air search radar
    • Hughes/Oki ZQQ-7 Sonar suite: 1 x bow-array, 4 x LF flank arrays and 1 x Towed array sonar
  • Countermeasures:
    • ZLR-3-6 ESM equipment
    • 2 x 3" underwater countermeasure launcher tubes for launching of Acoustic Device Countermeasures (ADCs)
  • Armament:
  • 6 x HU-606 21" torpedo tubes (with 30 reloads for Type 89 torpedoes an UGM-84 Harpoon AShMs)

Unit Run[edit]

  • JS Souryuu (SS-501)
  • JS Unryuu (SS-502)
  • JS Hakuryuu (SS-503)
  • JS Kenryuu (SS-504)
  • JS Zuiryuu (SS-505)
  • JS Kokuryu (SS-506)
  • JS Jinyuu (SS-507)
  • JS Sekiryuu (SS-508) - sea trials
  • JS Seiryuu (SS-509) - fitting out
  • JS Shoryu (SS-510) - fitting out
  • JS Unnamed (SS-511) - under construction
  • JS Unnamed (SS-512) - planned for construction
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