{
  "title": "Steven M. Selvick — late diesel-era working appearance",
  "version": "1.1",
  "file": "selvick-reconstruction.glb",
  "detailLevel": "full",
  "modelStatus": "Interpretive reconstruction, not a surveyed restoration or exact 1915 configuration",
  "units": "metres",
  "axes": {
    "up": "+Y",
    "bow": "-X",
    "stern": "+X",
    "starboard": "+Z"
  },
  "historicalDimensions": {
    "lengthFeet": 70,
    "beamFeet": 17,
    "registeredHullDepthFeet": 11,
    "lengthMetres": 21.336,
    "beamMetres": 5.1816,
    "lengthNote": "Workbook rounds to 69 ft; other publications give 70–71 ft. Modeling baseline is the 70 ft vessel database length."
  },
  "geometryReference": {
    "waterlineY": 2.32,
    "waterlineIsInferred": true,
    "deckY": 3.12,
    "origin": "Hull center in X/Z; keel plane Y=0"
  },
  "bounds": {
    "min": [
      -10.904208557875622,
      0.0,
      -2.904271359723423
    ],
    "max": [
      10.74630801169968,
      9.78,
      2.904271359723423
    ]
  },
  "triangleCount": 83754,
  "trianglesByGroup": {
    "hull": 17420,
    "bulwarks": 6928,
    "plate_details": 14832,
    "deck": 256,
    "propulsion": 1032,
    "deckhouse": 2390,
    "deckhouse_roof": 391,
    "wheelhouse": 134,
    "wheelhouse_roof": 391,
    "glazing": 528,
    "deck_equipment": 9456,
    "funnel": 1908,
    "ventilators": 1232,
    "mast_and_derrick": 424,
    "navigation": 760,
    "towing_gear": 1116,
    "safety_equipment": 1600,
    "hatch_covers": 88,
    "fenders": 18624,
    "painted_markings": 4244
  },
  "drawCalls": 49,
  "sailCount": 0,
  "groups": [
    "hull",
    "bulwarks",
    "plate_details",
    "deck",
    "propulsion",
    "deckhouse",
    "deckhouse_roof",
    "wheelhouse",
    "wheelhouse_roof",
    "glazing",
    "deck_equipment",
    "funnel",
    "ventilators",
    "mast_and_derrick",
    "navigation",
    "towing_gear",
    "safety_equipment",
    "hatch_covers",
    "fenders",
    "painted_markings"
  ],
  "documentedFeatures": [
    "Steel, single-screw tug, built at Cleveland in 1915 as Lorain. [Tugboat Information vessel 11729](https://www.tugboatinformation.com/tug.cfm?id=11729)",
    "Nominal dimensions 70×17×11 ft; other published lengths differ. [Tugboat Information vessel 11729](https://www.tugboatinformation.com/tug.cfm?id=11729)"
  ],
  "inferredFeatures": [
    "Exact hull lines, draft and full dimensions of deckhouse",
    "Working paint shades and fender distribution",
    "Navigation fittings, railings and rope arrangements",
    "Detailed towing hardware, hatch dimensions and restored glazing",
    "Propeller blade pitch and full submerged stern contours"
  ],
  "integration": {
    "selfContained": true,
    "textures": false,
    "supportsSails": false,
    "sailsNode": null,
    "visibilityNodes": {
      "fenders": "fenders",
      "mastAndDerrick": "mast_and_derrick"
    },
    "recommendedAsset": "selvick-map.glb",
    "suggestedControls": [
      "fenders",
      "waterline",
      "camera views"
    ]
  },
  "sources": [
    {
      "title": "MUPC Alger Underwater Preserve",
      "url": "https://www.michiganpreserves.org/alger-underwater-preserve/"
    },
    {
      "title": "DNR eyewitness sinking account",
      "url": "https://content.govdelivery.com/attachments/MIDNR/2019/08/22/file_attachments/1271354/Sidebar%20-%20Steven%20M.%20Selvick%20-%20pdf.pdf"
    },
    {
      "title": "Tugboat Information vessel 11729",
      "url": "https://www.tugboatinformation.com/tug.cfm?id=11729"
    },
    {
      "title": "Historical sinking photographs",
      "url": "https://exploringthenorth.com/scuba/selvik.html"
    }
  ],
  "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.",
  "configurationCaveat": "Late diesel-era working appearance under the Selvick name, before the 1996 deliberate sinking; not Lorain as built in 1915. Photographs guide the house and funnel, while restored glazing, working fittings and precise dimensions remain interpreted. Published lengths of 69, 70 and 71 ft conflict; geometry uses 70 ft.",
  "era": "Late diesel-era working appearance",
  "supportsSails": false
}