Katana a 244' (75m) jet boat, owned by software billionaire Larry Ellison, achored off the coast of Sardinia, Italy was built by the German shipyard, Blohm & Voss best know for
building military vessels. At top speeds it must be met half way across the ocean by a fuel tanker for refueling. The boat whose name means a Japanese sword has been known to cause a mini tsunami when it cruises by beaches sucking unwary beachgoers out to sea when she passes by at full throttle.