{
  "title": "Albatross",
  "era": "Elk Rapids Iron Company service, circa 1900",
  "version": "1.1",
  "modelStatus": "Interpretive reconstruction; no original lines plan recovered",
  "detailLevel": "full",
  "units": "metres",
  "axes": {
    "up": "+Y",
    "bow": "-X",
    "starboard": "+Z"
  },
  "historicalDimensions": {
    "lengthFeet": 62,
    "beamFeet": 15.5,
    "depthOfHoldFeet": 4.75,
    "beamInferred": false,
    "holdDepthUnknown": false,
    "dimensionsSourceQuality": "Selected documentary baseline; see vessel research notes for length and beam conflicts"
  },
  "geometryReference": {
    "hullBowX": -9.4488,
    "hullSternX": 9.4488,
    "deckY": 1.9,
    "waterlineY": 1.7,
    "waterlineIsInferred": true
  },
  "bounds": {
    "min": [
      -9.523645337439252,
      0.0050000000000000044,
      -2.5172000000000008
    ],
    "max": [
      9.59286,
      8.152577300841207,
      2.5172000000000008
    ]
  },
  "triangleCount": 38784,
  "trianglesByGroup": {
    "hull": 12668,
    "bulwarks": 8924,
    "fittings": 2276,
    "deck": 3822,
    "propulsion": 206,
    "anchors": 636,
    "deckhouses": 168,
    "cabin_roofs": 80,
    "windows": 408,
    "machinery": 192,
    "rubbing_strakes": 7232,
    "towing_gear": 60,
    "deck_rails": 1872,
    "ventilators": 240
  },
  "drawCalls": 33,
  "mastCount": 0,
  "supportsSails": false,
  "visibilityNodes": {
    "roofs": "cabin_roofs"
  },
  "deployedSailCount": 0,
  "inferredFeatures": [
    "Underwater hull lines and draft",
    "Exact colors, fittings, hatch layout and rigging routes"
  ],
  "configurationCaveat": "Construction specifications and a wreck survey establish the 62 × 15.5 ft oak tug. Photographs of this class guide the house and single funnel; some historical photo labels may mix Albatross with her very similar sister tugs. Metal-covered roofs and white hull are documented; minor fittings are inferred.",
  "sources": [
    {
      "title": "Doyal, MacMaster and O’Meara, Albatross survey, 2009",
      "url": "https://nasnmc.com/images/naspics/PDFs/Albatross.pdf"
    },
    {
      "title": "DNR historical photograph",
      "url": "https://www2.dnr.state.mi.us/Publications/PDFS/Fishing/Shipwrecks/GrandTraverseUnderwaterPreserve/Albatross.jpg"
    }
  ],
  "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": [
    "The survey reproduces records of a 62×15.5×4.75 ft tug built by George H.Notter in 1880. [Doyal, MacMaster and O’Meara, Albatross survey, 2009](https://nasnmc.com/images/naspics/PDFs/Albatross.pdf)",
    "Construction records describe white-oak framing/planking, pine deck and galvanized metal house roofs. [Doyal, MacMaster and O’Meara, Albatross survey, 2009](https://nasnmc.com/images/naspics/PDFs/Albatross.pdf)"
  ]
}