{
  "anchor_site": {
    "continuity_role": "site_anchor",
    "id": "LUX-LS-000001",
    "label": "Ирбенский плавучий маяк",
    "url": "/node/1336/"
  },
  "connected_ids": [
    "LUX-ASSET-000629",
    "LUX-LS-000001",
    "LUX-PLACE-000019",
    "LUX-PLACE-000020",
    "node:1336"
  ],
  "entity_id": "LUX-LS-000001",
  "events": [
    {
      "confidence_level": "high",
      "date": "1962-1994",
      "date_end": "1994",
      "date_precision": "year",
      "date_start": "1962",
      "description": "Irbenskiy carried a documented composite light and signal installation, including the AGA RD-311 light apparatus, MRM-54 radio beacon and LIEJ-300 nautophone; this equipment remains distinct from the vessel identity.",
      "event_id": "HERITAGE-REL-000132",
      "event_type": "carried_light",
      "relation_id": "HERITAGE-REL-000132",
      "review_status": "reviewed",
      "source_evidence": [
        {
          "evidence_note": "RGO identifies the carried AGA RD-311 light apparatus, MRM-54 radio beacon and LIEJ-300 nautophone and records the vessel's operational history.",
          "source_id": "rgo:irbenskiy",
          "source_label": "Russian Geographical Society - Irbenskiy lightship",
          "source_type": "heritage_organization",
          "source_url": "https://rgo.ru/activity/project-list/plavuchiy-mayak-irbenskiy/"
        },
        {
          "evidence_note": "Museum documentation identifies the preserved vessel as the Irbenskiy lightship.",
          "source_id": "museum-world-ocean:irbenskiy",
          "source_label": "Museum of the World Ocean - Irbenskiy",
          "source_type": "museum",
          "source_url": "https://www.world-ocean.ru/images/main/information_about_the_museum.pdf"
        }
      ],
      "source_id": "LUX-LS-000001",
      "source_label": "Ирбенский плавучий маяк",
      "target_id": "LUX-ASSET-000629",
      "target_label": "Irbenskiy light and signal installation",
      "title": "Ирбенский плавучий маяк carried light Irbenskiy light and signal installation",
      "valid_from": "",
      "valid_to": ""
    },
    {
      "confidence_level": "high",
      "date": "1963-1994",
      "date_end": "1994",
      "date_precision": "year",
      "date_start": "1963",
      "description": "Irbenskiy served the documented Irbe Strait station; the vessel could move around its mooring while the navigational station retained geographic meaning.",
      "event_id": "HERITAGE-REL-000131",
      "event_type": "served_station",
      "relation_id": "HERITAGE-REL-000131",
      "review_status": "reviewed",
      "source_evidence": [
        {
          "evidence_note": "RGO records entry into operation on 5 May 1963, service through 1994, and the working-station coordinate 57°51′ N, 21°37′ E; this supports a mobile vessel serving a named navigational station rather than a permanently fixed hull position.",
          "source_id": "rgo:irbenskiy",
          "source_label": "Russian Geographical Society - Irbenskiy lightship",
          "source_type": "heritage_organization",
          "source_url": "https://rgo.ru/activity/project-list/plavuchiy-mayak-irbenskiy/"
        }
      ],
      "source_id": "LUX-LS-000001",
      "source_label": "Ирбенский плавучий маяк",
      "target_id": "LUX-PLACE-000019",
      "target_label": "Irbenskiy lightship station",
      "title": "Ирбенский плавучий маяк served station Irbenskiy lightship station",
      "valid_from": "",
      "valid_to": ""
    },
    {
      "confidence_level": "high",
      "date": "2017",
      "date_end": "",
      "date_precision": "year",
      "date_start": "2017",
      "description": "The restored Irbenskiy became part of the Museum of the World Ocean fleet in Kaliningrad.",
      "event_id": "HERITAGE-REL-000133",
      "event_type": "preserved_at",
      "relation_id": "HERITAGE-REL-000133",
      "review_status": "reviewed",
      "source_evidence": [
        {
          "evidence_note": "RGO records the 2017 tow from Kronstadt to Kaliningrad and the vessel's restored museum role and present berth.",
          "source_id": "rgo:irbenskiy",
          "source_label": "Russian Geographical Society - Irbenskiy lightship",
          "source_type": "heritage_organization",
          "source_url": "https://rgo.ru/activity/project-list/plavuchiy-mayak-irbenskiy/"
        },
        {
          "evidence_note": "Museum material documents Irbenskiy in the museum fleet.",
          "source_id": "museum-world-ocean:irbenskiy",
          "source_label": "Museum of the World Ocean - Irbenskiy",
          "source_type": "museum",
          "source_url": "https://www.world-ocean.ru/images/main/information_about_the_museum.pdf"
        }
      ],
      "source_id": "LUX-LS-000001",
      "source_label": "Ирбенский плавучий маяк",
      "target_id": "LUX-PLACE-000020",
      "target_label": "Museum of the World Ocean berth, Kaliningrad",
      "title": "Ирбенский плавучий маяк preserved at Museum of the World Ocean berth, Kaliningrad",
      "valid_from": "",
      "valid_to": ""
    }
  ],
  "movement_events": [
    {
      "confidence_level": "high",
      "date": "2017",
      "date_end": "",
      "date_precision": "year",
      "date_start": "2017",
      "description": "The restored Irbenskiy became part of the Museum of the World Ocean fleet in Kaliningrad.",
      "event_id": "HERITAGE-REL-000133",
      "event_type": "preserved_at",
      "relation_id": "HERITAGE-REL-000133",
      "review_status": "reviewed",
      "source_evidence": [
        {
          "evidence_note": "RGO records the 2017 tow from Kronstadt to Kaliningrad and the vessel's restored museum role and present berth.",
          "source_id": "rgo:irbenskiy",
          "source_label": "Russian Geographical Society - Irbenskiy lightship",
          "source_type": "heritage_organization",
          "source_url": "https://rgo.ru/activity/project-list/plavuchiy-mayak-irbenskiy/"
        },
        {
          "evidence_note": "Museum material documents Irbenskiy in the museum fleet.",
          "source_id": "museum-world-ocean:irbenskiy",
          "source_label": "Museum of the World Ocean - Irbenskiy",
          "source_type": "museum",
          "source_url": "https://www.world-ocean.ru/images/main/information_about_the_museum.pdf"
        }
      ],
      "source_id": "LUX-LS-000001",
      "source_label": "Ирбенский плавучий маяк",
      "target_id": "LUX-PLACE-000020",
      "target_label": "Museum of the World Ocean berth, Kaliningrad",
      "title": "Ирбенский плавучий маяк preserved at Museum of the World Ocean berth, Kaliningrad",
      "valid_from": "",
      "valid_to": ""
    }
  ],
  "related_assets": [
    {
      "asset_kind": "lightship_equipment",
      "entity_type": "heritage_asset",
      "id": "LUX-ASSET-000629",
      "label": "Irbenskiy light and signal installation",
      "place_type": "",
      "url": "/heritage-assets/LUX-ASSET-000629/"
    }
  ],
  "related_places": [
    {
      "asset_kind": "",
      "entity_type": "heritage_place",
      "id": "LUX-PLACE-000019",
      "label": "Irbenskiy lightship station",
      "place_type": "historical_location",
      "url": "/heritage-places/LUX-PLACE-000019/"
    },
    {
      "asset_kind": "",
      "entity_type": "heritage_place",
      "id": "LUX-PLACE-000020",
      "label": "Museum of the World Ocean berth, Kaliningrad",
      "place_type": "museum",
      "url": "/heritage-places/LUX-PLACE-000020/"
    }
  ],
  "related_sites": [],
  "source_evidence": [
    {
      "evidence_note": "Canonical lightship record with floating-lighthouse classification and Baltic Sea taxonomy.",
      "source_id": "node:1336",
      "source_label": "Ирбенский плавучий маяк",
      "source_type": "migration",
      "source_url": "/node/1336"
    },
    {
      "evidence_note": "Entity status marks the record as inactive while preserving lightship identity.",
      "source_id": "node:1336",
      "source_label": "Ирбенский плавучий маяк",
      "source_type": "migration",
      "source_url": "/node/1336"
    },
    {
      "evidence_note": "Draft geolocation claim with location_role light_position, valid_from 1920, valid_to 1945.",
      "source_id": "GEO-LUX-LS-000001-light_position-pilot",
      "source_label": "Pilot lightship position",
      "source_type": "geolocation_claim",
      "source_url": ""
    },
    {
      "evidence_note": "RGO identifies the carried AGA RD-311 light apparatus, MRM-54 radio beacon and LIEJ-300 nautophone and records the vessel's operational history.",
      "source_id": "rgo:irbenskiy",
      "source_label": "Russian Geographical Society - Irbenskiy lightship",
      "source_type": "heritage_organization",
      "source_url": "https://rgo.ru/activity/project-list/plavuchiy-mayak-irbenskiy/"
    },
    {
      "evidence_note": "Museum documentation identifies the preserved vessel as the Irbenskiy lightship.",
      "source_id": "museum-world-ocean:irbenskiy",
      "source_label": "Museum of the World Ocean - Irbenskiy",
      "source_type": "museum",
      "source_url": "https://www.world-ocean.ru/images/main/information_about_the_museum.pdf"
    },
    {
      "evidence_note": "RGO records entry into operation on 5 May 1963, service through 1994, and the working-station coordinate 57°51′ N, 21°37′ E; this supports a mobile vessel serving a named navigational station rather than a permanently fixed hull position.",
      "source_id": "rgo:irbenskiy",
      "source_label": "Russian Geographical Society - Irbenskiy lightship",
      "source_type": "heritage_organization",
      "source_url": "https://rgo.ru/activity/project-list/plavuchiy-mayak-irbenskiy/"
    },
    {
      "evidence_note": "RGO records the 2017 tow from Kronstadt to Kaliningrad and the vessel's restored museum role and present berth.",
      "source_id": "rgo:irbenskiy",
      "source_label": "Russian Geographical Society - Irbenskiy lightship",
      "source_type": "heritage_organization",
      "source_url": "https://rgo.ru/activity/project-list/plavuchiy-mayak-irbenskiy/"
    },
    {
      "evidence_note": "Museum material documents Irbenskiy in the museum fleet.",
      "source_id": "museum-world-ocean:irbenskiy",
      "source_label": "Museum of the World Ocean - Irbenskiy",
      "source_type": "museum",
      "source_url": "https://www.world-ocean.ru/images/main/information_about_the_museum.pdf"
    }
  ],
  "threads": [
    {
      "anchor_site_id": "LUX-LS-000001",
      "description": "Continuity thread for a decommissioned Baltic lightship whose navigation meaning continues through named light service rather than a fixed tower.",
      "member_ids": [
        "LUX-LS-000001",
        "LUX-ASSET-000629"
      ],
      "members": [
        {
          "asset_kind": "",
          "entity_type": "lightship",
          "id": "LUX-LS-000001",
          "label": "Ирбенский плавучий маяк",
          "place_type": "",
          "url": "/node/1336/"
        },
        {
          "asset_kind": "lightship_equipment",
          "entity_type": "heritage_asset",
          "id": "LUX-ASSET-000629",
          "label": "Irbenskiy light and signal installation",
          "place_type": "",
          "url": "/heritage-assets/LUX-ASSET-000629/"
        }
      ],
      "source_evidence": [
        {
          "evidence_note": "Canonical lightship record with floating-lighthouse classification and Baltic Sea taxonomy.",
          "source_id": "node:1336",
          "source_label": "Ирбенский плавучий маяк",
          "source_type": "migration",
          "source_url": "/node/1336"
        }
      ],
      "status": "draft",
      "thread_id": "LUX-THREAD-000007",
      "thread_kind": "signal_continuity",
      "title": "Irbenskiy mobile light signal continuity"
    },
    {
      "anchor_site_id": "LUX-LS-000001",
      "description": "Continuity thread tracing whether reader continuity follows the hull, the lightship service name, or the station position.",
      "member_ids": [
        "LUX-LS-000001"
      ],
      "members": [
        {
          "asset_kind": "",
          "entity_type": "lightship",
          "id": "LUX-LS-000001",
          "label": "Ирбенский плавучий маяк",
          "place_type": "",
          "url": "/node/1336/"
        }
      ],
      "source_evidence": [
        {
          "evidence_note": "Entity status marks the record as inactive while preserving lightship identity.",
          "source_id": "node:1336",
          "source_label": "Ирбенский плавучий маяк",
          "source_type": "migration",
          "source_url": "/node/1336"
        }
      ],
      "status": "draft",
      "thread_id": "LUX-THREAD-000008",
      "thread_kind": "mobile_light_identity",
      "title": "Irbenskiy mobile light identity"
    },
    {
      "anchor_site_id": "LUX-LS-000001",
      "description": "Continuity thread for dated light_position station service at the documented Irbe Strait position.",
      "member_ids": [
        "LUX-LS-000001"
      ],
      "members": [
        {
          "asset_kind": "",
          "entity_type": "lightship",
          "id": "LUX-LS-000001",
          "label": "Ирбенский плавучий маяк",
          "place_type": "",
          "url": "/node/1336/"
        }
      ],
      "source_evidence": [
        {
          "evidence_note": "Draft geolocation claim with location_role light_position, valid_from 1920, valid_to 1945.",
          "source_id": "GEO-LUX-LS-000001-light_position-pilot",
          "source_label": "Pilot lightship position",
          "source_type": "geolocation_claim",
          "source_url": ""
        }
      ],
      "status": "draft",
      "thread_id": "LUX-THREAD-000009",
      "thread_kind": "lightship_station_service",
      "title": "Irbenskiy lightship station service"
    }
  ],
  "title": "Ирбенский плавучий маяк"
}