{
  "id": "sierra-ii",
  "name": "Sierra II Class (Project 945A Kondor)",
  "aliases": [
    "Project 945A Kondor Class"
  ],
  "domain": "naval",
  "country": "RUS",
  "category": "Nuclear-powered attack submarine",
  "status": null,
  "fielded": 1988,
  "operators": [
    "RUS"
  ],
  "prolif_count": 1,
  "summary": "The Sierra II Class (Project 945A Kondor) Russian Nuclear-Powered Attack Submarine is a follow-on to the Sierra I class. It was a small and expensive project.",
  "specs": [
    {
      "k": "crew",
      "v": 61,
      "src": [
        "weg-sierra-ii"
      ],
      "conf": "medium"
    },
    {
      "k": "length_m",
      "v": 110.5,
      "src": [
        "weg-sierra-ii"
      ],
      "conf": "medium"
    },
    {
      "k": "beam_m",
      "v": 14.2,
      "src": [
        "weg-sierra-ii"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Draft",
      "section": "dims",
      "v": "8.8 m",
      "src": [
        "weg-sierra-ii"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Displacement (surface)",
      "section": "dims",
      "v": "7,722 tons",
      "src": [
        "weg-sierra-ii"
      ],
      "conf": "medium"
    },
    {
      "k": "displacement_t",
      "v": 9246,
      "src": [
        "weg-sierra-ii"
      ],
      "conf": "medium",
      "label": "Displacement (submerged)"
    },
    {
      "k": "propulsion",
      "v": "1 x VM-5",
      "src": [
        "weg-sierra-ii"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Engine power",
      "section": "mobility",
      "v": "48,000 total shp",
      "src": [
        "weg-sierra-ii"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Surface Search / Navigation Radar",
      "section": "firecontrol",
      "v": "1 x MRK-50 Albatros' series (Snoop Pair) surface search/navigation",
      "src": [
        "weg-sierra-ii"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Passive Flank Array Sonar",
      "section": "firecontrol",
      "v": "1 x MGK-540 Skat-3 (Shark Gill) low frequency suite that includes Shark Rib passive flank arrays",
      "src": [
        "weg-sierra-ii"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Mine-Avoidance Sonar",
      "section": "firecontrol",
      "v": "1 x MG-519 (Mouse Roar) active high-frequency mine-avoidance system",
      "src": [
        "weg-sierra-ii"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Towed Passive Array Sonar",
      "section": "firecontrol",
      "v": "1 x large aperture towed passive hydrophone array",
      "src": [
        "weg-sierra-ii"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Hull Armor",
      "section": "protection",
      "v": "The Project 945A nuclear-powered submarine is the sole submarine in the world with a titanium hull, which reduces its radar signature considerably.",
      "src": [
        "weg-sierra-ii"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "NBC Water Washdown System",
      "section": "protection",
      "v": "Yes",
      "src": [
        "weg-sierra-ii"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "EW Intercept",
      "section": "protection",
      "v": "1 x Rim Hat intercept",
      "src": [
        "weg-sierra-ii"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "EW Direction-Finding",
      "section": "protection",
      "v": "1 x Park Hat direction-finding",
      "src": [
        "weg-sierra-ii"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Communication: communications suite",
      "section": "armament",
      "v": "The class is fitted with the Omnibus combat system, Molnaya-MTs communications suite and the Symfoniya navigation suite.",
      "src": [
        "weg-sierra-ii"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Torpedo System: torpedo launcher",
      "section": "armament",
      "v": "6 x 533-mm bow",
      "src": [
        "weg-sierra-ii"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Torpedo System: torpedo name",
      "section": "armament",
      "v": "USET-80 torpedo",
      "src": [
        "weg-sierra-ii"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Torpedo System: basic load",
      "section": "armament",
      "v": "40 x USET-80 torpedoes carried]",
      "src": [
        "weg-sierra-ii"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Mine System",
      "section": "armament",
      "v": "42 x mines max in lieu of torpedoes and/or other weapons",
      "src": [
        "weg-sierra-ii"
      ],
      "conf": "medium"
    },
    {
      "k": "armament",
      "v": "SS-N-21 Sampson Cruise Missile; 1 x Man-portable SAM system",
      "src": [
        "weg-sierra-ii"
      ],
      "conf": "medium"
    },
    {
      "k": "hulls",
      "v": 2,
      "src": [
        "weg-sierra-ii"
      ],
      "conf": "medium",
      "note": "Hulls listed in the source card"
    }
  ],
  "payloads": [
    {
      "name": "SS-N-21 Sampson Cruise Missile",
      "role": "Sea-Launched Cruise Missile",
      "src": [
        "weg-sierra-ii"
      ],
      "conf": "medium",
      "caps": {
        "Type": "Sea-Launched Cruise Missile",
        "Guidance": "Sprut inertial with terrain contour matching homing",
        "Warhead": "200 kt nuclear; or 400 kg high-explosive or submunitions",
        "Speed": "390 knots (720 km/h)",
        "Length": "8.1 m"
      },
      "range_km": 2400,
      "qty": "40 x SS-N-21 Sampson Cruise Missile"
    },
    {
      "name": "1 x Man-portable SAM system",
      "role": "Strela-2M missiles",
      "src": [
        "weg-sierra-ii"
      ],
      "conf": "medium",
      "caps": {
        "Type": "Strela-2M missiles",
        "Guidance": "Proportional navigation logic",
        "Warhead": "1.15 kg directed-energy blast fragmentation warhead",
        "Speed": "430 m/s",
        "Length": "1.44 m"
      },
      "range_km": 4.2,
      "qty": "12 x Strela-2M missiles"
    }
  ],
  "variants": [
    {
      "name": "NIZHNIY NOVGOROD   (ex-ZUBATKA)",
      "text": "Commissioned: 1988 Status: Active Fleet: Northern Fleet",
      "src": [
        "weg-sierra-ii"
      ]
    },
    {
      "name": "PSKOV",
      "text": "Commissioned: 1992 Status: Active Fleet: Northern Fleet",
      "src": [
        "weg-sierra-ii"
      ]
    }
  ],
  "art": "submarine",
  "image": {
    "file": "sierra-ii.jpg",
    "thumb": "sierra-ii-thumb.jpg",
    "credit": "DoDMedia",
    "license": "Public domain",
    "url": "https://commons.wikimedia.org/wiki/File:Sierra_class_SSN.jpg",
    "title": "File:Sierra class SSN.jpg"
  },
  "verified": null,
  "changelog": [
    {
      "date": "2026-10-10",
      "change": "Entry created from the Worldwide Equipment Guide (ODIN), bulk import"
    },
    {
      "date": "2026-10-10",
      "change": "Added photo (Public domain)"
    }
  ],
  "url": "https://www.defensepedia.com/systems/sierra-ii.html",
  "sources": {
    "weg-sierra-ii": {
      "title": "Sierra II Class (Project 945A Kondor) Russian Nuclear-Powered Attack Submarine",
      "publisher": "U.S. Army TRADOC G-2 Worldwide Equipment Guide (ODIN)",
      "url": "https://odin.t2com.army.mil/WEG/Asset/Sierra_II_Class_Project_945A_Kondor_Russian_Nuclear-Powered_Attack_Submarine",
      "published": "2026-03-20",
      "tier": 1,
      "checked": "2026-10-10"
    }
  }
}