Territorial Waters Jurisdiction Act, 1878.

This Act declares an offence committed by a person, whether British or foreigner, on the open sea within the territorial waters of Her Majesty's dominions, to an offence within the jurisdiction of the Admiral. The territorial waters of Her Majesty's dominions” here means such part of the sea adjacent to the coast of the United Kingdom, or the coast of some other part of Her Majesty's dominions, as is deemed by international law to be within the territorial sovereignty of Her Majesty; and for the purpose of any offence declared by this Act to be within the jurisdiction of the Admiral, any part of the open sea within one marine league of the coast measured from the low-water mark shall be deemed to be open sea within the territorial waters of Her Majesty's dominions.