{
  "title": "Lucinda Van Valkenburg",
  "era": "Qualified three-masted sailing interpretation, before 1887",
  "version": "1.1",
  "modelStatus": "Interpretive reconstruction; no original lines plan recovered",
  "detailLevel": "full",
  "units": "metres",
  "axes": {
    "up": "+Y",
    "bow": "-X",
    "starboard": "+Z"
  },
  "historicalDimensions": {
    "lengthFeet": 128,
    "beamFeet": 26,
    "depthOfHoldFeet": null,
    "beamInferred": false,
    "holdDepthUnknown": true,
    "dimensionsSourceQuality": "Selected documentary baseline; see vessel research notes for length and beam conflicts"
  },
  "geometryReference": {
    "hullBowX": -19.5072,
    "hullSternX": 19.5072,
    "deckY": 3.9,
    "waterlineY": 2.7,
    "waterlineIsInferred": true
  },
  "bounds": {
    "min": [
      -24.988404364763333,
      0.0050000000000000044,
      -4.0474000000000006
    ],
    "max": [
      19.592200000000002,
      29.903018734695287,
      4.0474000000000006
    ]
  },
  "triangleCount": 67434,
  "trianglesByGroup": {
    "hull": 12950,
    "bulwarks": 9298,
    "fittings": 3044,
    "deck": 6542,
    "propulsion": 52,
    "anchors": 636,
    "deckhouses": 936,
    "skylights": 60,
    "spars": 9476,
    "standing_rigging": 3456,
    "sails": 16044,
    "running_rigging": 2304,
    "cargo_hatches": 120,
    "hatch_covers": 264,
    "centerboard_trunk": 24,
    "ship_boat": 1816,
    "steering": 412
  },
  "drawCalls": 57,
  "mastCount": 3,
  "supportsSails": true,
  "visibilityNodes": {
    "sails": "sails"
  },
  "deployedSailCount": 5,
  "inferredFeatures": [
    "Underwater hull lines and draft",
    "Exact colors, fittings, hatch layout and rigging routes",
    "Absolute spar heights and sail shapes"
  ],
  "configurationCaveat": "NOAA’s 2020 information sheet calls this a three-masted schooner; its vessel page says two. This model selects three and leaves the conflict unresolved. Wreck imagery guides the centerboard trunk and full stern; sail inventory, hull lines, deck fittings and paint are interpreted.",
  "sources": [
    {
      "title": "NOAA vessel record",
      "url": "https://thunderbay.noaa.gov/shipwrecks/lucinda_van_valkenburg.html",
      "use": "Vessel identity, scale, history and surviving evidence"
    },
    {
      "title": "NOAA 2020 information sheet",
      "url": "https://nmssanctuaries.blob.core.windows.net/sanctuaries-prod/media/docs/2020-thunder-bay-information-sheet.pdf",
      "use": "Three-mast caption conflicts with current two-mast catalogue"
    },
    {
      "title": "3DShipwrecks Lucinda field survey",
      "url": "https://3dshipwrecks.org/3086-2/",
      "use": "Survey team’s fantail observation and conflicting 138 ft figure; mesh not reused"
    },
    {
      "title": "WHS Sailing Canallers regional context",
      "url": "https://www.wisconsinshipwrecks.org/Files/canaller-regional-context.pdf",
      "use": "Comparable hull and rig practice; not Lucinda-specific plans"
    }
  ],
  "revisedDate": "2026-09-08",
  "revisionNote": "Added sourced documentary features and repaired metadata and research-note formatting; this collection cleanup is not a new full historical or geometry audit.",
  "documentedFeatures": [
    "Built by Albert Little at Tonawanda in 1862; NOAA dimensions 128×26 ft. [NOAA vessel record](https://thunderbay.noaa.gov/shipwrecks/lucinda_van_valkenburg.html)",
    "NOAA’s vessel page calls the schooner two-masted, conflicting with its three-mast information sheet. [NOAA vessel record](https://thunderbay.noaa.gov/shipwrecks/lucinda_van_valkenburg.html)"
  ]
}