{
  "id": "trawler_32m_offshore",
  "name": "Arrastrero offshore 32 m",
  "type": "fishing",
  "subtype": "trawler",
  "length_overall_m": 32.0,
  "beam_max_m": 9.0,
  "draft_m": 3.8,
  "displacement_kg": 250000,
  "description": "Pesquero arrastrero offshore genérico de 32 m, casco desplazamiento, maquinaria de pesca + bodega refrigerada grande + tanques RSW (refrigerated sea water).",
  "data_source": "seed_estimate",
  "decks": [
    { "id": "lower", "name": "Bodega y pañoles", "z_bl_bottom": 0.5, "z_bl_top": 3.5, "polygon_xy": [] },
    { "id": "main", "name": "Cubierta principal", "z_bl_bottom": 3.5, "z_bl_top": 6.0, "polygon_xy": [] },
    { "id": "wheelhouse", "name": "Caseta de gobierno", "z_bl_bottom": 6.0, "z_bl_top": 8.5, "polygon_xy": [] }
  ],
  "bulkheads": [
    { "id": "collision", "name": "Mamparo de colisión", "x_pp": 29.0, "description": "" },
    { "id": "er_fwd", "name": "Mamparo proa SM", "x_pp": 10.0, "description": "" },
    { "id": "er_aft", "name": "Mamparo popa SM", "x_pp": 4.0, "description": "" },
    { "id": "fish_hold_fwd", "name": "Mamparo bodega proa", "x_pp": 18.0, "description": "" }
  ]
}