{
  "title": "Haltiner’s Barge",
  "era": "Working derrick interpretation, before c. 1929",
  "version": "1.1",
  "modelStatus": "Interpretive reconstruction; no original lines plan recovered",
  "detailLevel": "full",
  "units": "metres",
  "axes": {
    "up": "+Y",
    "bow": "-X",
    "starboard": "+Z"
  },
  "historicalDimensions": {
    "lengthFeet": 80,
    "beamFeet": 33,
    "depthOfHoldFeet": null,
    "beamInferred": false,
    "holdDepthUnknown": true,
    "dimensionsSourceQuality": "Selected documentary baseline; see vessel research notes for length and beam conflicts"
  },
  "geometryReference": {
    "hullBowX": -12.192,
    "hullSternX": 12.192,
    "deckY": 2.05,
    "waterlineY": 1.3,
    "waterlineIsInferred": true
  },
  "bounds": {
    "min": [
      -15.989208159658126,
      0.0050000000000000044,
      -5.263171570553083
    ],
    "max": [
      12.312,
      14.764244531139159,
      5.263171570553083
    ]
  },
  "triangleCount": 36874,
  "trianglesByGroup": {
    "hull": 13006,
    "fittings": 2300,
    "deck": 9148,
    "anchors": 636,
    "rubbing_rails": 7296,
    "boiler": 136,
    "machinery": 392,
    "standing_rigging": 24,
    "shelter": 140,
    "derrick": 3340,
    "winches": 456
  },
  "drawCalls": 23,
  "mastCount": 0,
  "supportsSails": false,
  "visibilityNodes": {
    "crane": "derrick"
  },
  "deployedSailCount": 0,
  "inferredFeatures": [
    "Underwater hull lines and draft",
    "Exact colors, fittings, hatch layout and rigging routes"
  ],
  "configurationCaveat": "Wreck evidence establishes a wooden barge, steel crane, boiler and winches. Their working arrangement, crane height and boom angle are inferred from period derrick practice, not a recovered plan. Build date is unknown. NOAA says c. 1929 loss; the tracker says 1927.",
  "sources": [
    {
      "title": "NOAA vessel record",
      "url": "https://thunderbay.noaa.gov/shipwrecks/haltiner.html",
      "use": "Vessel identity, scale, history and surviving evidence"
    },
    {
      "title": "NOAA crane wreck photograph",
      "url": "https://thunderbay.noaa.gov/media/img/20201204-haltiner-2-1000.jpg",
      "use": "Inspected lattice steel crane remains"
    },
    {
      "title": "NOAA 2014 expansion EIS",
      "url": "https://nmssanctuaries.blob.core.windows.net/sanctuaries-prod/media/archive/library/pdfs/tb-eis-expansion2014.pdf",
      "use": "Older table lists 1927; loss date remains inconsistent"
    }
  ],
  "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 identifies an 80×33 ft wooden derrick barge. [NOAA vessel record](https://thunderbay.noaa.gov/shipwrecks/haltiner.html)",
    "The wreck includes a steel crane, boiler and winches. [NOAA vessel record](https://thunderbay.noaa.gov/shipwrecks/haltiner.html)"
  ]
}