{
  "title": "Empire State",
  "era": "Brigantine interpretation following NOAA, 1862–1877",
  "version": "1.1",
  "modelStatus": "Interpretive reconstruction; no original lines plan recovered",
  "detailLevel": "full",
  "units": "metres",
  "axes": {
    "up": "+Y",
    "bow": "-X",
    "starboard": "+Z"
  },
  "historicalDimensions": {
    "lengthFeet": 136,
    "beamFeet": 25,
    "depthOfHoldFeet": null,
    "beamInferred": false,
    "holdDepthUnknown": true,
    "dimensionsSourceQuality": "NOAA catalogue; conflicting secondary dimensions flagged in notes"
  },
  "geometryReference": {
    "hullBowX": -20.7264,
    "hullSternX": 20.7264,
    "deckY": 3.65,
    "waterlineY": 2.55,
    "waterlineIsInferred": true
  },
  "bounds": {
    "min": [
      -27.378764663510005,
      0.0050000000000000044,
      -5.9
    ],
    "max": [
      20.811400000000003,
      30.002851535588956,
      5.9
    ]
  },
  "triangleCount": 61262,
  "trianglesByGroup": {
    "hull": 12950,
    "bulwarks": 9346,
    "fittings": 2844,
    "deck": 6266,
    "propulsion": 52,
    "anchors": 636,
    "deckhouses": 1008,
    "skylights": 60,
    "cargo_hatches": 120,
    "hatch_covers": 264,
    "spars": 4792,
    "standing_rigging": 2316,
    "sails": 15980,
    "running_rigging": 2400,
    "ship_boat": 1816,
    "steering": 412
  },
  "drawCalls": 55,
  "mastCount": 2,
  "supportsSails": true,
  "visibilityNodes": {
    "sails": "sails"
  },
  "deployedSailCount": 6,
  "inferredFeatures": [
    "Underwater hull lines and draft",
    "Exact colors, fittings, hatch layout and rigging routes",
    "Absolute spar heights and sail shapes"
  ],
  "configurationCaveat": "NOAA describes a two-masted brigantine, 136 × 25 ft. A secondary compilation instead reports a wider three-masted vessel and an 1874 conversion. This model follows NOAA’s brigantine description; its exact career configuration remains disputed. Six display sails, deck arrangement and canal-like hull form are interpretations, not recovered plans.",
  "sources": [
    {
      "title": "NOAA Empire State record",
      "url": "https://thunderbay.noaa.gov/shipwrecks/empire_state.html",
      "use": "Preferred two-masted brigantine classification, 136 × 25 ft baseline and dates"
    },
    {
      "title": "NOAA 2013 condition report",
      "url": "https://repository.library.noaa.gov/view/noaa/2668/noaa_2668_DS1.pdf",
      "use": "Brigantine vessel-table classification"
    },
    {
      "title": "Great Lakes Shipwreck Files: Empire State 7816",
      "url": "https://greatlakesrex.wordpress.com/e/",
      "use": "Conflicting three-mast, dimensions and rebuild account; not reconciled"
    },
    {
      "title": "WHS canaller archaeological context",
      "url": "https://www.wisconsinshipwrecks.org/Files/canaller-regional-context.pdf",
      "use": "Comparable regional hull family; not direct Empire State hull or fitting evidence"
    }
  ],
  "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 lists a wooden two-masted brigantine launched by Lewis Shickluna at St.Catharines in 1862. [NOAA Empire State record](https://thunderbay.noaa.gov/shipwrecks/empire_state.html)",
    "NOAA wreck dimensions 136×25 ft; a conflicting compilation describes a different rig and proportions. [NOAA Empire State record](https://thunderbay.noaa.gov/shipwrecks/empire_state.html)"
  ]
}