Line

The Territorial Sea (Baselines) Order 2014 establishes the baselines from which the breadth of the territorial sea adjacent to the United Kingdom, the Channel Islands and the Isle of Man is measured in accordance with the United Nations Convention on the Law of the Sea. The baseline is generally the low-water line around the coast, including the coast of all islands.

This layer is extracted from the UKHO Law of the Sea department data.

This layer shows the limits of the territorial sea of the United Kingdom which are to be treated as adjacent to Northern Ireland.

This version is from UKHO Law of the Sea department data, available via ADMIRALTY Marine Data Portal 

An exclusive economic zone (EEZ) is the zone in which the coastal state exercises the rights under Part V of the United Nations Convention on the Law of the Sea. These rights relate principally to the water column and may extend to 200 nautical miles from baselines.

This is a modified version from the UKHO Law of the Sea department data, available via https://www.gov.uk/guidance/inspire-portal-and-medin-bathymetry-data-archive-centre

The inshore fishing boundary - 6 miles from baselines - is defined in the Inshore Fishing (Scotland) Act 1984. Inshore waters, part of Territorial Waters (12 mile limit), form part of Scotland as defined in the Scotland Act 1998. 

This is modified version from the UKHO Law of the Sea department data, available via https://www.gov.uk/guidance/inspire-portal-and-medin-bathymetry-data-archive-centre