{
  "title": "D.M. Wilson",
  "era": "Intact bulk-freighter interpretation, 1873–1894",
  "version": "1.1",
  "modelStatus": "Interpretive reconstruction; no original lines plan recovered",
  "detailLevel": "full",
  "units": "metres",
  "axes": {
    "up": "+Y",
    "bow": "-X",
    "starboard": "+Z"
  },
  "historicalDimensions": {
    "lengthFeet": 179,
    "beamFeet": 32,
    "depthOfHoldFeet": null,
    "beamInferred": false,
    "holdDepthUnknown": true,
    "dimensionsSourceQuality": "NOAA catalogue"
  },
  "geometryReference": {
    "hullBowX": -27.279600000000002,
    "hullSternX": 27.279600000000002,
    "deckY": 4.05,
    "waterlineY": 2.9,
    "waterlineIsInferred": true
  },
  "bounds": {
    "min": [
      -27.347509671958104,
      0.0050000000000000044,
      -4.961800000000001
    ],
    "max": [
      27.356878417309865,
      24.01286753601346,
      4.961800000000001
    ]
  },
  "triangleCount": 45384,
  "trianglesByGroup": {
    "hull": 12668,
    "bulwarks": 9572,
    "fittings": 2980,
    "deck": 8044,
    "propulsion": 208,
    "anchors": 636,
    "deckhouses": 3864,
    "pilothouse": 864,
    "cargo_hatches": 180,
    "hatch_covers": 504,
    "machinery": 576,
    "standing_rigging": 1152,
    "skylights": 72,
    "ship_boat": 1816,
    "spars": 1648,
    "running_rigging": 600
  },
  "drawCalls": 56,
  "mastCount": 2,
  "supportsSails": false,
  "visibilityNodes": {
    "hatches": "hatch_covers"
  },
  "deployedSailCount": 0,
  "inferredFeatures": [
    "Underwater hull lines and draft",
    "Exact colors, fittings, hatch layout and rigging routes"
  ],
  "configurationCaveat": "Documented: 179 × 32 ft hull, forward cargo area, aft boiler position and screw propulsion. Inferred: separated forward and aft houses follow contemporary Great Lakes bulk freighters; two bare working masts and hatch stations are provisional. No intact portrait or original arrangement plan was recovered.",
  "sources": [
    {
      "title": "NOAA D.M. Wilson record",
      "url": "https://thunderbay.noaa.gov/shipwrecks/d_m_wilson.html",
      "use": "Dimensions, type, dates"
    },
    {
      "title": "W.R. Lusardi 2006 site sketch, NOAA",
      "url": "https://thunderbay.noaa.gov/media/img/20200928-wilson-site-plan-1000.jpg",
      "use": "Cargo body, windlass, aft boiler area, stack, pump, rudder and propeller"
    },
    {
      "title": "NOAA historical overview: B.W. Blanchard photo",
      "url": "https://sanctuaries.noaa.gov/science/condition/tbnms/history.html",
      "use": "Contemporary bulk-carrier comparison; not a portrait of Wilson"
    },
    {
      "title": "NPS Michigan Maritime Heritage study",
      "url": "https://npshistory.com/publications/srs/mi-maritime-heritage.pdf",
      "use": "Printed p.95: general bulk-carrier arrangement; type inference only"
    }
  ],
  "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": [
    "Wooden bulk freighter built by Simon Langell at St.Clair in 1873. [NOAA D.M. Wilson record](https://thunderbay.noaa.gov/shipwrecks/d_m_wilson.html)",
    "NOAA wreck dimensions 179×32 ft. [NOAA D.M. Wilson record](https://thunderbay.noaa.gov/shipwrecks/d_m_wilson.html)"
  ]
}