{
  "id": "foxtrot",
  "name": "Foxtrot Class (Project 641 Class)",
  "aliases": [],
  "domain": "naval",
  "country": "RUS",
  "category": "Diesel-electric patrol submarine",
  "status": null,
  "fielded": 1958,
  "operators": [
    "CUB",
    "IND",
    "LBY",
    "POL",
    "RUS",
    "UKR"
  ],
  "prolif_count": 6,
  "summary": "The Foxtrot Class (Project 641 Class) Russian Diesel-Electric Patrol Submarine is a class of diesel-electric patrol submarines that were built in the Soviet Union.",
  "specs": [
    {
      "k": "",
      "label": "Units built",
      "section": "system",
      "v": "74 ea",
      "src": [
        "weg-foxtrot"
      ],
      "conf": "medium"
    },
    {
      "k": "crew",
      "v": 12,
      "src": [
        "weg-foxtrot"
      ],
      "conf": "medium"
    },
    {
      "k": "length_m",
      "v": 89.9,
      "src": [
        "weg-foxtrot"
      ],
      "conf": "medium"
    },
    {
      "k": "beam_m",
      "v": 7.4,
      "src": [
        "weg-foxtrot"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Draft",
      "section": "dims",
      "v": "5.9 m (19 ft 4 in)",
      "src": [
        "weg-foxtrot"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Propulsion",
      "section": "mobility",
      "v": "3 x shafts, each with 6-bladed propellers",
      "src": [
        "weg-foxtrot"
      ],
      "conf": "medium"
    },
    {
      "k": "speed_kt",
      "v": 21,
      "src": [
        "weg-foxtrot"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Endurance",
      "section": "mobility",
      "v": "45 days",
      "src": [
        "weg-foxtrot"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Test depth",
      "section": "mobility",
      "v": "300 m",
      "src": [
        "weg-foxtrot"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "CICS",
      "section": "firecontrol",
      "v": "Yes (Legacy System)",
      "src": [
        "weg-foxtrot"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Sonar",
      "section": "firecontrol",
      "v": "Tamil 5L sonar system",
      "src": [
        "weg-foxtrot"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Launcher",
      "section": "armament",
      "v": "10 × torpedo tubes (6 bow, 4 stern)",
      "src": [
        "weg-foxtrot"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Armament options",
      "section": "armament",
      "v": "22 x torpedoes (anti-submarine or anti-ship)",
      "src": [
        "weg-foxtrot"
      ],
      "conf": "medium"
    }
  ],
  "payloads": [],
  "variants": [
    {
      "name": "Foxtrot Class Patrol Submarine",
      "text": "No significant changes to the design across the various production countries. Most vessels saw service in the Soviet Navy. Foxtrots were also built for the Indian Navy (eight units, from 1967 to 1974), Libyan (six units, from 1978 to 1980), and Cuban (six…",
      "src": [
        "weg-foxtrot"
      ]
    }
  ],
  "art": "submarine",
  "image": null,
  "verified": null,
  "changelog": [
    {
      "date": "2026-10-10",
      "change": "Entry created from the Worldwide Equipment Guide (ODIN), bulk import"
    }
  ],
  "url": "https://www.defensepedia.com/systems/foxtrot.html",
  "sources": {
    "weg-foxtrot": {
      "title": "Foxtrot Class (Project 641 Class) Russian Diesel-Electric Patrol Submarine",
      "publisher": "U.S. Army TRADOC G-2 Worldwide Equipment Guide (ODIN)",
      "url": "https://odin.t2com.army.mil/WEG/Asset/Foxtrot_Class_Project_641_Class_Russian_Diesel-Electric_Patrol_Submarine",
      "published": "2026-03-20",
      "tier": 1,
      "checked": "2026-10-10"
    }
  }
}