{
  "title": "James H. Hall",
  "era": "Two-masted sailing form shown in historical image",
  "version": "1.1",
  "modelStatus": "Interpretive reconstruction; no original lines plan recovered",
  "detailLevel": "full",
  "units": "metres",
  "axes": {
    "up": "+Y",
    "bow": "-X",
    "starboard": "+Z"
  },
  "historicalDimensions": {
    "lengthFeet": 91,
    "beamFeet": 22,
    "depthOfHoldFeet": null,
    "beamInferred": false,
    "holdDepthUnknown": true,
    "dimensionsSourceQuality": "Selected documentary baseline; see vessel research notes for length and beam conflicts"
  },
  "geometryReference": {
    "hullBowX": -13.868400000000001,
    "hullSternX": 13.868400000000001,
    "deckY": 2.8,
    "waterlineY": 1.85,
    "waterlineIsInferred": true
  },
  "bounds": {
    "min": [
      -20.26460501127761,
      0.0050000000000000044,
      -3.4378000000000006
    ],
    "max": [
      13.953400000000002,
      25.602858262179982,
      3.4378000000000006
    ]
  },
  "triangleCount": 57724,
  "trianglesByGroup": {
    "hull": 12950,
    "bulwarks": 9106,
    "fittings": 2772,
    "deck": 5468,
    "propulsion": 52,
    "anchors": 636,
    "deckhouses": 840,
    "skylights": 60,
    "spars": 5296,
    "standing_rigging": 2316,
    "sails": 14128,
    "running_rigging": 1536,
    "cargo_hatches": 120,
    "hatch_covers": 216,
    "ship_boat": 1816,
    "steering": 412
  },
  "drawCalls": 55,
  "mastCount": 2,
  "supportsSails": true,
  "visibilityNodes": {
    "sails": "sails"
  },
  "deployedSailCount": 7,
  "inferredFeatures": [
    "Underwater hull lines and draft",
    "Exact colors, fittings, hatch layout and rigging routes",
    "Absolute spar heights and sail shapes"
  ],
  "configurationCaveat": "The historical image on NOAA’s page clearly shows two masts with gaff sails and topsails; its text instead labels three masts. This model follows the image, not a proven loss-day configuration. Seven display sails, hull lines, deck layout and paint are interpretations.",
  "sources": [
    {
      "title": "NOAA vessel record",
      "url": "https://thunderbay.noaa.gov/shipwrecks/james_h_hall.html",
      "use": "Vessel identity, scale, history and surviving evidence"
    },
    {
      "title": "NOAA-hosted James H. Hall image",
      "url": "https://thunderbay.noaa.gov/media/img/20201203-james-h-hall-400.jpg",
      "use": "Directly inspected two-masted sailing image"
    }
  ],
  "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 Hanson and Scove at Manitowoc in 1885; NOAA dimensions 91×22 ft. [NOAA vessel record](https://thunderbay.noaa.gov/shipwrecks/james_h_hall.html)",
    "NOAA’s text says three masts while its historical image shows two; the model follows the image and retains the conflict. [NOAA vessel record](https://thunderbay.noaa.gov/shipwrecks/james_h_hall.html)"
  ]
}