#bilge_keel__bilgekeel  either of two lengthwise fins attached along the outside of a ship's bilge; reduces rolling
  supertype:  #keel  one of the main longitudinal beams (or plates) of the hull of a vessel; can extend vertically into the water to provide lateral stability
  part of:  #vessel.craft__watercraft  a craft designed for water transportation

No statement uses or specializes #bilge_keel; click here to add one.