The Bailiwick of Guernsey’s territorial seas shall increase in size on 23 July 2019. The current limit of the Bailiwick’s territorial seas is 3 nautical miles (nm) from the baselines. The new limit will be 12 nm. The territorial sea would extend to less than 12 nm wherever the distance between the baselines of the Bailiwick and the baselines of another party (France or Jersey) is less than 24 nm. Fishing access in the waters around the Bailiwick, from 0 to 12 nautical miles, will remain unchanged on the date of extension. The Bailiwick fisheries management regime will also remain the same as it was before extension until any new regime is subsequently agreed. More information is available here.
Bailiwick of Guernsey maritime boundaries. Source: States of Guernsey.
De Maribus 