sentences:  Article 103
  "Definition of a pirate ship or aircraft"
  
  A ship or aircraft is considered a pirate ship or aircraft if it is intended by the persons in dominant control to be used for the purpose of committing one of the acts referred to in article 101.The same applies if the ship or aircraft has been used to commit any such act, so long as it remains under the control of the persons guilty of that act.Since this definition is restricted to the high seas, piracy in British territorial waters would today be treated as robbery, assault or attempted murder under the Territorial Waters Jurisdiction Act 1878, or as hijacking under the Aviation and Maritime Security Act 1990 (which can also be applied to piracy on the high seas).