{
  "title": "Bermuda — evidence-informed reconstruction of the original two-masted schooner",
  "version": "1.1",
  "modelStatus": "Interpretive reconstruction, not photogrammetry or a measured restoration design",
  "units": "metres",
  "axes": {
    "up": "+Y",
    "bow": "-X",
    "stern": "+X",
    "starboard": "+Z"
  },
  "origin": "Hull length/beam center on the keel bottom; Y=0 at lowest keel surface",
  "historicalDimensions": {
    "lengthFeet": 136,
    "beamFeet": 26,
    "holdDepthFeet": 11.75,
    "lengthMetres": 41.4528,
    "beamMetres": 7.9248,
    "holdDepthMetres": 3.5814
  },
  "geometryReference": {
    "deckY": 3.8,
    "waterlineY": 2.85,
    "bottomY": 0,
    "waterlineIsInferred": true,
    "hullBowX": -20.7264,
    "hullSternX": 20.7264
  },
  "bounds": {
    "min": [
      -29.867180501251486,
      0.0,
      -4.390964335310437
    ],
    "max": [
      21.28,
      30.80038970751958,
      4.390964335310437
    ]
  },
  "triangleCount": 107132,
  "trianglesByGroup": {
    "hull": 26457,
    "fittings": 11464,
    "deck": 5746,
    "bulwarks": 2668,
    "cargo_hatches": 1380,
    "hatch_covers": 516,
    "cabin": 776,
    "standing_rigging": 20244,
    "spars": 10984,
    "running_rigging": 4620,
    "sails": 22277
  },
  "drawCalls": 55,
  "groups": [
    "hull",
    "fittings",
    "deck",
    "bulwarks",
    "cargo_hatches",
    "hatch_covers",
    "cabin",
    "standing_rigging",
    "spars",
    "running_rigging",
    "sails"
  ],
  "sailCount": 6,
  "documentedFeatures": [
    "The WHS report documents straight sides, a flat bottom, sharp bilges, plumb bow, centerboard and a slightly raked flat transom. Figure 29 gives the hull-lines reference. [Sailing Canallers: A Great Lakes Regional Context, Technical Report 17-003, pp.35–37](https://wisconsinshipwrecks.org/Files/canaller-regional-context.pdf#page=42).",
    "The build record identifies George Goble of Oswego, 1860, with a 136 ft hull and 26 ft beam. [Naval Marine Archive](https://navalmarinearchive.com/sbh/shipyards/19thcentury/goble.html).",
    "The Stonehouse/Fountain account describes the foremast about 30 ft abaft the stem, three cargo hatches, two companionways, centerboard trunk and aft cabin. It records three crew drowned in October 1870, later raising and relocation to Murray Bay in 1883, and renewed sinking. The identification is the account’s best explanation of this wreck. [Shipwreck Tours](https://shipwrecktours.com/the-bermuda/)."
  ],
  "inferredFeatures": [
    "Three headsails, gaff fore and mainsails, a small fore gaff topsail and dark/light hull bands are transferred from the photograph catalogued as Bermuda. Its attribution is uncertain and these are not direct established Bermuda features.",
    "The photograph shows a rounded overhanging counter with tumblehome and a boomkin, unlike the archaeological flat transom. The model follows the wreck evidence for its stern.",
    "The short main boom stopping before the transom is a canaller-type inference, not a specific observed Bermuda measurement.",
    "Mast heights, exact sail inventory, paint pigments, rigging, small machinery, windows and loaded waterline are interpreted."
  ],
  "arrangementMetresFromBow": {
    "foremast": 9.144,
    "mainmast": 25.5,
    "hatchCenters": [
      13.1,
      21.45,
      28.45
    ],
    "aftCabinRange": [
      30.9,
      36.7
    ],
    "centerboardTrunkRange": [
      15.6,
      20.0
    ]
  },
  "sources": [
    {
      "title": "WHS canaller report, Figure 29",
      "url": "https://wisconsinshipwrecks.org/Files/canaller-regional-context.pdf#page=42",
      "use": "See the cited evidence and uncertainty sections in the research notes."
    },
    {
      "title": "Goble yard record",
      "url": "https://navalmarinearchive.com/sbh/shipyards/19thcentury/goble.html",
      "use": "See the cited evidence and uncertainty sections in the research notes."
    },
    {
      "title": "Stonehouse/Fountain account",
      "url": "https://shipwrecktours.com/the-bermuda/",
      "use": "See the cited evidence and uncertainty sections in the research notes."
    },
    {
      "title": "Contested photographic attribution",
      "url": "https://commons.wikimedia.org/wiki/File:Bermuda_schooner.jpg",
      "use": "See the cited evidence and uncertainty sections in the research notes."
    },
    {
      "title": "Alpena catalogue",
      "url": "https://greatlakeships.org/2900482/data?n=425",
      "use": "See the cited evidence and uncertainty sections in the research notes."
    },
    {
      "title": "Wreck inventory",
      "url": "https://3dshipwrecks.org/shipwreck-bermuda/",
      "use": "See the cited evidence and uncertainty sections in the research notes."
    }
  ],
  "integration": {
    "format": "binary glTF 2.0",
    "selfContained": true,
    "textures": false,
    "materials": "PBR roughness/metalness, named material primitives merged by semantic group",
    "sailsToggleNode": "sails",
    "hatchCoverToggleNode": "hatch_covers",
    "recommendedMapUse": "Display at full metre scale; translate model Y by minus chosen waterline for lake surface Y=0; use a reduced-detail derivative for many simultaneous markers"
  },
  "excluded": [
    "Engine",
    "Propeller",
    "Cannon",
    "Figurehead",
    "Raised forecastle or poop",
    "Square sails"
  ],
  "detailLevel": "full",
  "file": "bermuda-reconstruction.glb",
  "revisedDate": "2026-09-08",
  "revisionNote": "Corrected the September 2026 audit findings and distinguished documentary evidence, interpretation and unresolved conflicts.",
  "era": "Evidence-informed 1860–1870 two-masted canaller associated with the Murray Bay wreck",
  "configurationCaveat": "Archaeology guides the flat raked transom and canaller hull. The photograph catalogued as Bermuda has an uncertain attribution and a conflicting rounded counter; its sail inventory and tonal bands are treated as inferences. Mast heights, paint and missing fittings remain interpreted.",
  "builder": "George Goble, Oswego, 1860"
}