{
  "title": "B.W. Blanchard",
  "era": "Early working appearance, before 1897",
  "version": "1.1",
  "modelStatus": "Interpretive reconstruction; no original lines plan recovered",
  "detailLevel": "full",
  "units": "metres",
  "axes": {
    "up": "+Y",
    "bow": "-X",
    "starboard": "+Z"
  },
  "historicalDimensions": {
    "lengthFeet": 221,
    "beamFeet": 32.4,
    "depthOfHoldFeet": 12.2,
    "lengthCaveat": "NOAA wreck-length display baseline; early registered length differs",
    "hullHeightInferred": true
  },
  "geometryReference": {
    "hullBowX": -33.6804,
    "hullSternX": 33.6804,
    "deckY": 4.1,
    "waterlineY": 2.9,
    "waterlineIsInferred": true
  },
  "bounds": {
    "min": [
      -33.726099348883054,
      0.12,
      -5.13776
    ],
    "max": [
      33.73288303366994,
      32.00336559551473,
      5.13776
    ]
  },
  "triangleCount": 51528,
  "trianglesByGroup": {
    "hull": 11232,
    "bulwarks": 9756,
    "deck": 7676,
    "fittings": 2072,
    "cargo_sidewalls": 4320,
    "support_arches": 2632,
    "cargo_hatches": 180,
    "hatch_covers": 468,
    "deckhouses": 3792,
    "pilothouse": 36,
    "spars": 1260,
    "standing_rigging": 888,
    "machinery": 5332,
    "ship_boat": 1816,
    "propulsion": 68
  },
  "drawCalls": 46,
  "mastCount": 1,
  "supportsSails": false,
  "visibilityNodes": {
    "hatches": "hatch_covers"
  },
  "deployedSailCount": 0,
  "propulsionMode": "Steam propeller",
  "inferredFeatures": [
    "Hull lines, draft, colors and small fittings",
    "Deck layout and machinery proportions",
    "Example railcars/stores are illustrative, not a historical loading manifest"
  ],
  "configurationCaveat": "Photograph-informed early appearance with wooden support arches, one visible foremast and an aft funnel. Later refits are not reproduced. NOAA lists a 221 ft wreck length; a historical dimension table lists 212.3 ft. Model scale uses 221 ft as an approximate display baseline.",
  "sources": [
    {
      "title": "NOAA Thunder Bay National Marine Sanctuary: B.W. Blanchard",
      "url": "https://thunderbay.noaa.gov/shipwrecks/blanchard.html",
      "use": "Vessel type, scale baseline, dates and wreck evidence"
    },
    {
      "title": "B.W. Blanchard historical photograph, before 1897, via Wikimedia Commons",
      "url": "https://commons.wikimedia.org/wiki/File:B.W._Blanchard.jpg",
      "use": "Wooden support arches, foremast/gaff, aft funnel and early superstructure silhouette; photo attribution links Great Lakes Maritime Collection"
    }
  ],
  "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 Quayle and Martin at Cleveland in 1870. [NOAA Thunder Bay National Marine Sanctuary: B.W. Blanchard](https://thunderbay.noaa.gov/shipwrecks/blanchard.html)",
    "NOAA gives 221 ft wreck length and 32.4 ft beam; original-vessel length differs in the comparative table. [NOAA Thunder Bay National Marine Sanctuary: B.W. Blanchard](https://thunderbay.noaa.gov/shipwrecks/blanchard.html)"
  ]
}