{
  "id": "princess_y85",
  "name": "Princess Y85",
  "type": "yacht_motor",
  "subtype": "planing",
  "length_overall_m": 25.94,
  "beam_max_m": 5.92,
  "draft_m": 1.92,
  "displacement_kg": 64500,
  "description": "Yate motor planeo británico, casco V profundo. Propulsión convencional 2 motores diésel directos a hélices. Tope ~32 nudos. 4 cabinas.",
  "data_source": "seed_estimate",
  "decks": [
    { "id": "lower", "name": "Cubierta inferior", "z_bl_bottom": 0.5, "z_bl_top": 2.7, "polygon_xy": [] },
    { "id": "main", "name": "Cubierta principal", "z_bl_bottom": 2.7, "z_bl_top": 4.9, "polygon_xy": [] },
    { "id": "flybridge", "name": "Flybridge", "z_bl_bottom": 4.9, "z_bl_top": 6.5, "polygon_xy": [] }
  ],
  "bulkheads": [
    { "id": "collision", "name": "Mamparo colisión", "x_pp": 23.4, "description": "" },
    { "id": "er_fwd", "name": "Mamparo proa SM", "x_pp": 7.8, "description": "" },
    { "id": "er_aft", "name": "Mamparo popa SM", "x_pp": 3.8, "description": "" }
  ]
}