{
  "title": "Manhattan",
  "era": "Original c.1887 working appearance",
  "version": "1.1",
  "modelStatus": "Interpretive reconstruction; no original lines plan recovered",
  "detailLevel": "full",
  "units": "metres",
  "axes": {
    "up": "+Y",
    "bow": "-X",
    "starboard": "+Z"
  },
  "historicalDimensions": {
    "lengthFeet": 252.4,
    "beamFeet": 38,
    "depthOfHoldFeet": 19.4,
    "beamAndDepthInferred": false
  },
  "geometryReference": {
    "hullBowX": -38.46576,
    "hullSternX": 38.46576,
    "deckY": 6.2,
    "waterlineY": 4.6,
    "waterlineIsInferred": true
  },
  "bounds": {
    "min": [
      -44.254297387785186,
      0.0050000000000000044,
      -5.876200000000001
    ],
    "max": [
      38.52606751902515,
      36.52245924208555,
      5.876200000000001
    ]
  },
  "triangleCount": 49488,
  "trianglesByGroup": {
    "hull": 12668,
    "bulwarks": 9956,
    "fittings": 3260,
    "deck": 8990,
    "propulsion": 208,
    "anchors": 636,
    "deckhouses": 3390,
    "pilothouse": 972,
    "cargo_hatches": 240,
    "hatch_covers": 816,
    "machinery": 1008,
    "standing_rigging": 1740,
    "ship_boat": 1816,
    "spars": 3788
  },
  "drawCalls": 50,
  "mastCount": 3,
  "supportsSails": false,
  "visibilityNodes": {
    "hatches": "hatch_covers"
  },
  "deployedSailCount": 0,
  "inferredFeatures": [
    "Underwater hull lines and draft",
    "Exact colors, fittings, hatch layout and rigging routes"
  ],
  "configurationCaveat": "Original three-mast, two-funnel appearance follows NPS historical photographs. Model uses the 1887 enrollment; catalogue construction year remains 1886. Exact funnel spacing and hull lines are interpreted.",
  "sources": [
    {
      "title": "Labadie, NPS Submerged Cultural Resources Study: Pictured Rocks National Lakeshore (1989)",
      "url": "https://www.npshistory.com/series/archeology/scrc/22/report.pdf",
      "use": "Printed pp.48–50: enrollment, machinery and original/later photographs"
    },
    {
      "title": "3D Shipwrecks: Manhattan",
      "url": "https://3dshipwrecks.org/shipwreck-manhattan/",
      "use": "Independent survey summary of original dimensions and dates"
    }
  ],
  "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 April 12, 1887 enrollment gives 252.4×38×19.4 ft. [Labadie, NPS Submerged Cultural Resources Study: Pictured Rocks National Lakeshore (1989)](https://www.npshistory.com/series/archeology/scrc/22/report.pdf)",
    "Detroit Dry Dock Company built the two-deck, three-masted vessel. [Labadie, NPS Submerged Cultural Resources Study: Pictured Rocks National Lakeshore (1989)](https://www.npshistory.com/series/archeology/scrc/22/report.pdf)"
  ]
}