{
  "title": "Montana",
  "era": "Photograph-guided package-freighter form",
  "version": "1.1",
  "modelStatus": "Interpretive reconstruction; no original lines plan recovered",
  "detailLevel": "full",
  "units": "metres",
  "axes": {
    "up": "+Y",
    "bow": "-X",
    "starboard": "+Z"
  },
  "historicalDimensions": {
    "lengthFeet": 236,
    "beamFeet": 36,
    "depthOfHoldFeet": null,
    "beamInferred": false,
    "holdDepthUnknown": true,
    "dimensionsSourceQuality": "Selected documentary baseline; see vessel research notes for length and beam conflicts"
  },
  "geometryReference": {
    "hullBowX": -35.9664,
    "hullSternX": 35.9664,
    "deckY": 5.3,
    "waterlineY": 3.7,
    "waterlineIsInferred": true
  },
  "bounds": {
    "min": [
      -36.030141025508925,
      0.0050000000000000044,
      -5.5714000000000015
    ],
    "max": [
      36.04129118140791,
      34.30385488520999,
      5.5714000000000015
    ]
  },
  "triangleCount": 52880,
  "trianglesByGroup": {
    "hull": 12668,
    "bulwarks": 9860,
    "fittings": 3012,
    "deck": 9056,
    "propulsion": 208,
    "anchors": 636,
    "deckhouses": 5952,
    "pilothouse": 40,
    "steering": 412,
    "support_arches": 4200,
    "spars": 1736,
    "standing_rigging": 2292,
    "machinery": 392,
    "ship_boat": 1816,
    "ventilators": 480,
    "cargo_ports": 120
  },
  "drawCalls": 48,
  "mastCount": 2,
  "supportsSails": false,
  "visibilityNodes": {
    "arches": "support_arches"
  },
  "deployedSailCount": 0,
  "inferredFeatures": [
    "Underwater hull lines and draft",
    "Exact colors, fittings, hatch layout and rigging routes"
  ],
  "configurationCaveat": "The photograph guides the timber arches, long deckhouse, tall foremast and short aft mast. This represents the package-freighter career, before the later lumber conversion; fine fittings, hull lines and paint are interpreted.",
  "sources": [
    {
      "title": "NOAA vessel record",
      "url": "https://thunderbay.noaa.gov/shipwrecks/montana.html",
      "use": "Identity, dimensions, history and surviving evidence"
    },
    {
      "title": "Historical Montana photograph",
      "url": "https://commons.wikimedia.org/wiki/File:Montana_ship.jpg",
      "use": "Inspected hull, long deckhouse, curved timber arches, tall foremast, short stern mast and single aft funnel."
    }
  ],
  "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 236×36 ft wooden package freighter built in 1872. [NOAA vessel record](https://thunderbay.noaa.gov/shipwrecks/montana.html)",
    "The vessel later entered the lumber trade. [NOAA vessel record](https://thunderbay.noaa.gov/shipwrecks/montana.html)"
  ]
}