{
  "id": "borei",
  "name": "Borei (Project 955)",
  "aliases": [
    "Project 955",
    "Dolgorukiy class"
  ],
  "domain": "naval",
  "country": "RUS",
  "category": "Nuclear-powered ballistic missile submarine",
  "status": "in-service",
  "fielded": 2013,
  "operators": [
    "RUS"
  ],
  "prolif_count": 1,
  "summary": "The Borei Class (Project 955 Borei Class) Russian Nuclear-Powered Ballistic Missile Submarine are series of nuclear-powered ballistic missile submarines being constructed by Sevmash for the Russian Navy. The class is projected to replace the Soviet-era Delta III, Delta IV, and Typhoon classes in Russian Navy service.",
  "specs": [
    {
      "k": "",
      "label": "Builders",
      "section": "system",
      "v": "Sevmash, designed by Rubin",
      "src": [
        "weg-borei"
      ],
      "conf": "medium"
    },
    {
      "k": "crew",
      "v": 107,
      "src": [
        "weg-borei"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Endurance",
      "section": "mobility",
      "v": "90 days",
      "src": [
        "weg-borei"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Normal diving depth",
      "section": "mobility",
      "v": "380 m",
      "src": [
        "weg-borei"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Maximum diving depth",
      "section": "mobility",
      "v": "480 m",
      "src": [
        "weg-borei"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Navigation Radar",
      "section": "firecontrol",
      "v": "1 x Medveditsa-M system radar",
      "src": [
        "weg-borei"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Towed Array Sonar",
      "section": "firecontrol",
      "v": "1 x MGK-540 Skat-3M with towed array sonar",
      "src": [
        "weg-borei"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Communications",
      "section": "firecontrol",
      "v": "1 x Molnaya-M system",
      "src": [
        "weg-borei"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Combat Control",
      "section": "firecontrol",
      "v": "1 x Omnibus system",
      "src": [
        "weg-borei"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "NBC Washdown",
      "section": "protection",
      "v": "Yes",
      "src": [
        "weg-borei"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Diminsions: length",
      "section": "armament",
      "v": "170.0 m",
      "src": [
        "weg-borei"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Diminsions: beam",
      "section": "armament",
      "v": "13.5 m",
      "src": [
        "weg-borei"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Diminsions: draft",
      "section": "armament",
      "v": "9.0 m",
      "src": [
        "weg-borei"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Diminsions: displacement, surface",
      "section": "armament",
      "v": "14,720 tons",
      "src": [
        "weg-borei"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Diminsions: displacement, submerged",
      "section": "armament",
      "v": "24,000 tons",
      "src": [
        "weg-borei"
      ],
      "conf": "medium"
    },
    {
      "k": "armament",
      "v": "12 x RSM-56 Bulava (NATO: SS-NX-30); 12 x Type 53 Torpedo; 1 x Igla-M shoulder-launched system",
      "src": [
        "weg-borei"
      ],
      "conf": "medium"
    },
    {
      "k": "hulls",
      "v": 10,
      "src": [
        "weg-borei"
      ],
      "conf": "low",
      "note": "Hulls listed in the source card"
    },
    {
      "k": "length_m",
      "v": 170,
      "src": [
        "weg-borei"
      ],
      "conf": "medium"
    },
    {
      "k": "beam_m",
      "v": 13.5,
      "src": [
        "weg-borei"
      ],
      "conf": "medium"
    },
    {
      "k": "displacement_t",
      "label": "Displacement (submerged)",
      "v": 24000,
      "src": [
        "weg-borei"
      ],
      "conf": "medium"
    }
  ],
  "payloads": [
    {
      "name": "12 x RSM-56 Bulava (NATO: SS-NX-30)",
      "role": "Submarine-Launched Ballistic Missile (SLBM)",
      "src": [
        "weg-borei"
      ],
      "conf": "medium",
      "caps": {
        "Type": "Submarine-Launched Ballistic Missile (SLBM)",
        "Guidance": "Inertial guidance, possibly with Astro-inertial guidance and/or GLONASS update",
        "Warhead": "6-10 × 100-150 kt MIRVs",
        "Length": "11.5 m (38 ft) (without warhead) 12.1 m "
      },
      "range_km": [
        8000,
        8300
      ],
      "qty": "12 x RSM-56 Bulava (NATO: SS-NX-30) missiles."
    },
    {
      "name": "12 x Type 53 Torpedo",
      "role": "ASUW Torpedo",
      "src": [
        "weg-borei"
      ],
      "conf": "medium",
      "caps": {
        "Type": "ASUW Torpedo",
        "Guidance": "Wake homing",
        "Speed": "83 km/h",
        "Length": "7.2 m"
      },
      "range_km": 18,
      "qty": "12 x Type 53 Torpedos"
    },
    {
      "name": "1 x Igla-M shoulder-launched system",
      "role": "man-portable infrared homing surface-to-air missile (SAM)",
      "src": [
        "weg-borei"
      ],
      "conf": "medium",
      "caps": {
        "Type": "man-portable infrared homing surface-to-air missile (SAM)",
        "Guidance": "dual waveband infra-red (S-version",
        "Warhead": "1.17 kg (2.6 lb) with 390 g (14 oz) explosive",
        "Speed": "570 m/s",
        "Length": "1.574 m"
      },
      "range_km": 5,
      "qty": "1 x Igla-M shoulder-launched system with 8 x 9K38 Igla Missiles"
    }
  ],
  "variants": [
    {
      "name": "Project 955 (Borei Class)",
      "text": "Despite being a replacement for many types of SSBNs, Borei-class submarines are much smaller than those of the Typhoon class in both volume and crew (24,000 tons opposed to 48,000 tons and 107 personnel as opposed to 160 for the Typhoons).",
      "src": [
        "weg-borei"
      ]
    },
    {
      "name": "Project 955A (Borei-A Class)",
      "text": "Units of Project 955A include improved communication and detection systems, improved acoustic signature, and have major structural changes such as the addition of all moving rudders and vertical endplates to the hydroplanes for higher maneuverability, and a…",
      "src": [
        "weg-borei"
      ]
    },
    {
      "name": "Project 955B (Borei-B Class)",
      "text": "Project 955B was expected to feature a new water jet propulsion system, an upgraded hull, and new noise reduction technology. The concept design was to be initiated by the Rubin Design Bureau in 2018 and four project 955B boats were been proposed with the…",
      "src": [
        "weg-borei"
      ]
    },
    {
      "name": "Yury Dolgorukiy",
      "text": "Project: 955 Commissioned: 2013 Status: Active Fleet: Northern Fleet",
      "src": [
        "weg-borei"
      ]
    },
    {
      "name": "Alexander Nevsky",
      "text": "Project: 955 Commissioned: 2013 Status: Active Fleet: Pacific Fleet",
      "src": [
        "weg-borei"
      ]
    },
    {
      "name": "Vladimir Monomakh",
      "text": "Project: 955 Commissioned: 2014 Status: Active Fleet: Pacific Fleet",
      "src": [
        "weg-borei"
      ]
    },
    {
      "name": "Knyaz Vladimir",
      "text": "Project: 955А Commissioned: 2020 Status: Active Fleet: Northern Fleet",
      "src": [
        "weg-borei"
      ]
    },
    {
      "name": "Knyaz Oleg",
      "text": "Project: 955А Commissioned: 2020 Status: Active Fleet: Pacific Fleet",
      "src": [
        "weg-borei"
      ]
    }
  ],
  "art": "submarine",
  "image": {
    "file": "borei.jpg",
    "thumb": "borei-thumb.jpg",
    "credit": "Министерство обороны Российской Федерации",
    "license": "CC BY 4.0",
    "url": "https://commons.wikimedia.org/wiki/File:K-552_at_Northern_fleet.jpg",
    "title": "File:K-552 at Northern fleet.jpg"
  },
  "verified": null,
  "changelog": [
    {
      "date": "2026-10-05",
      "change": "Entry created from the Worldwide Equipment Guide (ODIN)"
    },
    {
      "date": "2026-10-06",
      "change": "Added photo (CC BY 4.0)"
    }
  ],
  "url": "https://www.defensepedia.com/systems/borei.html",
  "sources": {
    "weg-borei": {
      "title": "Borei Class (Project 955 Borei Class) Russian Nuclear-Powered Ballistic Missile Submarine",
      "publisher": "U.S. Army TRADOC G-2 Worldwide Equipment Guide (ODIN)",
      "url": "https://odin.t2com.army.mil/WEG/Asset/Borei_Class_Project_955_Borei_Class_Russian_Nuclear-Powered_Ballistic_Missile_Submarine",
      "published": "2026-03-20",
      "tier": 1,
      "checked": "2026-10-10"
    }
  }
}