{
  "title": "Barge No. 012",
  "era": "Late steel work-barge form, c.1970s",
  "version": "1.1",
  "modelStatus": "Interpretive reconstruction; no original lines plan recovered",
  "detailLevel": "full",
  "units": "metres",
  "axes": {
    "up": "+Y",
    "bow": "-X",
    "starboard": "+Z"
  },
  "historicalDimensions": {
    "lengthFeet": 160,
    "beamFeet": 44,
    "depthOfHoldFeet": null,
    "lengthCaveat": "Rounded documented baseline",
    "hullHeightInferred": true
  },
  "geometryReference": {
    "hullBowX": -24.384,
    "hullSternX": 24.384,
    "deckY": 2.8,
    "waterlineY": 1.85,
    "waterlineIsInferred": true
  },
  "bounds": {
    "min": [
      -24.414205251406404,
      0.12,
      -6.770600000000002
    ],
    "max": [
      24.42513476783946,
      4.454376,
      6.770600000000002
    ]
  },
  "triangleCount": 26278,
  "trianglesByGroup": {
    "hull": 7284,
    "fittings": 2016,
    "deck": 1218,
    "cargo_hatches": 2568,
    "hatch_covers": 1416,
    "machinery": 9880,
    "stores": 1896
  },
  "drawCalls": 21,
  "mastCount": 0,
  "supportsSails": false,
  "visibilityNodes": {
    "hatches": "hatch_covers"
  },
  "deployedSailCount": 0,
  "propulsionMode": "Unpowered barge",
  "inferredFeatures": [
    "Hull lines, draft, colors and small fittings",
    "Deck layout and machinery proportions",
    "Example railcars/stores are illustrative, not a historical loading manifest"
  ],
  "configurationCaveat": "NOAA calls this Barge 12 and describes its rectangular welded steel hull. This depicts an intact interpretation of its late working form, not a verified original 1897 configuration. Hull height, hatch layout and equipment placement are provisional; no original arrangement plan was recovered.",
  "sources": [
    {
      "title": "NOAA Thunder Bay National Marine Sanctuary: Barge No. 012",
      "url": "https://thunderbay.noaa.gov/shipwrecks/barge-twelve.html",
      "use": "Vessel type, scale baseline, dates and wreck evidence"
    }
  ],
  "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": [
    "NOAA describes a rectangular welded-steel barge 160×44 ft. [NOAA Thunder Bay National Marine Sanctuary: Barge No. 012](https://thunderbay.noaa.gov/shipwrecks/barge-twelve.html)",
    "The wreck has deck access hatches, ladders, storage compartments and winch equipment. [NOAA Thunder Bay National Marine Sanctuary: Barge No. 012](https://thunderbay.noaa.gov/shipwrecks/barge-twelve.html)"
  ]
}