{
  "title": "Samuel Mather",
  "era": "Photographed wooden freighter, 1887–1891",
  "version": "1.1",
  "modelStatus": "Interpretive reconstruction; no original lines plan recovered",
  "detailLevel": "full",
  "units": "metres",
  "axes": {
    "up": "+Y",
    "bow": "-X",
    "starboard": "+Z"
  },
  "historicalDimensions": {
    "lengthFeet": 246,
    "beamFeet": 40,
    "depthOfHoldFeet": 19.3,
    "beamInferred": false,
    "holdDepthUnknown": false,
    "dimensionsSourceQuality": "Selected documentary baseline; see vessel research notes for length and beam conflicts"
  },
  "geometryReference": {
    "hullBowX": -37.4904,
    "hullSternX": 37.4904,
    "deckY": 6.25,
    "waterlineY": 4.6,
    "waterlineIsInferred": true
  },
  "bounds": {
    "min": [
      -37.55588229975034,
      0.0050000000000000044,
      -6.181000000000001
    ],
    "max": [
      37.784400000000005,
      35.25427408225241,
      6.181000000000001
    ]
  },
  "triangleCount": 54026,
  "trianglesByGroup": {
    "hull": 12668,
    "bulwarks": 9908,
    "fittings": 3012,
    "deck": 10070,
    "propulsion": 206,
    "anchors": 636,
    "deckhouses": 7416,
    "pilothouse": 36,
    "steering": 412,
    "stern_gallery": 1282,
    "machinery": 784,
    "standing_rigging": 2304,
    "spars": 2408,
    "cargo_hatches": 180,
    "hatch_covers": 648,
    "ventilators": 240,
    "ship_boat": 1816
  },
  "drawCalls": 49,
  "mastCount": 2,
  "supportsSails": false,
  "visibilityNodes": {
    "hatches": "hatch_covers"
  },
  "deployedSailCount": 0,
  "inferredFeatures": [
    "Underwater hull lines and draft",
    "Exact colors, fittings, hatch layout and rigging routes"
  ],
  "configurationCaveat": "The crowded historic photograph guides the stern gallery and twin aft funnels; nearby schooner masts belong to other ships. Two masts are selected from historical accounts. Hold depth is reported as 14 ft or about 19 ft; this model selects 19.3 ft. Hidden bow details and hatch arrangement are inferred.",
  "sources": [
    {
      "title": "Historical photograph: Samuel Mather (1887)",
      "url": "https://commons.wikimedia.org/wiki/File:Samuel_Mather_%281887%29.jpg"
    },
    {
      "title": "Historical loss compilation, M entries",
      "url": "https://greatlakesrex.wordpress.com/m/"
    },
    {
      "title": "Modern wreck survey: Samuel Mather",
      "url": "https://3dshipwrecks.org/shipwreck-samuel-mather/"
    },
    {
      "title": "Samuel Mather historical summary and bibliography",
      "url": "https://en.wikipedia.org/wiki/SS_Samuel_Mather_%281887%29"
    }
  ],
  "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 wreck inventory identifies the 1887 wooden propeller freighter, 246×40 ft, lost in 1891. [Modern wreck survey: Samuel Mather](https://3dshipwrecks.org/shipwreck-samuel-mather/)"
  ]
}