{
  "title": "James Davidson",
  "era": "Working form with reinforcing arches, 1877–1883",
  "version": "1.1",
  "modelStatus": "Interpretive reconstruction; no original lines plan recovered",
  "detailLevel": "full",
  "units": "metres",
  "axes": {
    "up": "+Y",
    "bow": "-X",
    "starboard": "+Z"
  },
  "historicalDimensions": {
    "lengthFeet": 230.5,
    "beamFeet": 37,
    "depthOfHoldFeet": 19.5,
    "beamInferred": false,
    "holdDepthUnknown": false,
    "dimensionsSourceQuality": "Selected documentary baseline; see vessel research notes for length and beam conflicts"
  },
  "geometryReference": {
    "hullBowX": -35.1282,
    "hullSternX": 35.1282,
    "deckY": 6.7,
    "waterlineY": 4.9,
    "waterlineIsInferred": true
  },
  "bounds": {
    "min": [
      -35.19333770185928,
      0.0050000000000000044,
      -5.7238000000000016
    ],
    "max": [
      35.20391664740936,
      35.7039553110393,
      5.7238000000000016
    ]
  },
  "triangleCount": 55822,
  "trianglesByGroup": {
    "hull": 12668,
    "bulwarks": 9836,
    "fittings": 3212,
    "deck": 9286,
    "propulsion": 208,
    "anchors": 636,
    "deckhouses": 4464,
    "pilothouse": 36,
    "support_arches": 4760,
    "machinery": 392,
    "standing_rigging": 3408,
    "cargo_hatches": 180,
    "hatch_covers": 540,
    "spars": 3780,
    "running_rigging": 504,
    "ship_boat": 1816,
    "cargo_ports": 96
  },
  "drawCalls": 50,
  "mastCount": 3,
  "supportsSails": false,
  "visibilityNodes": {
    "arches": "support_arches"
  },
  "deployedSailCount": 0,
  "inferredFeatures": [
    "Underwater hull lines and draft",
    "Exact colors, fittings, hatch layout and rigging routes"
  ],
  "configurationCaveat": "NOAA’s historical account gives 230 ft 6 in × 37 ft and three masts, with reinforcing arches added in 1877. Its vessel page lists smaller surviving wreck dimensions. Photographs guide the silhouette; arch curvature, deck arrangement and paint are interpreted.",
  "sources": [
    {
      "title": "NOAA vessel record",
      "url": "https://thunderbay.noaa.gov/shipwrecks/james_davidson.html",
      "use": "Vessel identity, scale, history and surviving evidence"
    },
    {
      "title": "NOAA James Davidson historical account",
      "url": "https://sanctuaries.noaa.gov/earthisblue/wk66-davidson.html",
      "use": "Original vessel dimensions, three masts, screw and 1877 arches"
    },
    {
      "title": "James Davidson historical photograph",
      "url": "https://commons.wikimedia.org/wiki/File:James_Davidson_ship.jpg",
      "use": "Inspected archive image; crowded mooring view, not a plan"
    }
  ],
  "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’s historical account gives 230 ft 6 in length, 37 ft beam and 19 ft 6 in hold depth. [NOAA James Davidson historical account](https://sanctuaries.noaa.gov/earthisblue/wk66-davidson.html)",
    "Three masts and screw propulsion are recorded, with reinforcing arches added in 1877. [NOAA James Davidson historical account](https://sanctuaries.noaa.gov/earthisblue/wk66-davidson.html)"
  ]
}