The 1982 United Nations Convention on the Law of the Sea defines in Article 101 (Definition of Piracy): Violent acts in the
territorial sea are
armed robbery under the law of the
International Maritime Organization. Ships have been captured off the coast of Somalia and crews held for ransom since the 1990s, with armed groups in the territorial sea and the government unable to enforce the law. The
United Nations Security Council Resolution 1816 on
Piracy in Somalia provided an exception, that piracy could occur in the Territorial Sea of Somalia. This allowed states to cooperate with the
Transitional Federal Government of Somalia in order to suppress piracy.
Two-ship requirement The condition in Article 101(a)(i) UNCLOS definition is known as the “two-ship” requirement. Although there was extreme violence this did not meet the UNCLOS piracy definition of motivation (
mens rea) for “private ends”. Although there was violence on board the ship, because there were not 'two ships' this could not be seen as piracy. The 1988 SUA Convention and its 2005 Protocol are United Nations treaties. In the 1986 case
Castle John v. NV Mabeco, the court ruled that a
Greenpeace vessel committed piracy in acts against a Dutch Vessel, which was discharging waste at sea. == Other measures against piracy ==