This Territorial waters boundary is incorrect. 
It needs to be be updated in relation to the Blackwater Bank Low Water Elevation (52.4864 N -006.1652) as per UK Admiralty Charts. 
The territorial water boundary at this point is based on 12nm from an arc drawn from the Blackwater Bank Low Water Elevation.
See links for more info:
http://www.irishstatutebook.ie/eli/2006/act/8/section/92/enacted/en/html

https://www.kildarestreet.com/wrans/?id=2019-07-02a.305&s=%22straight+baseline%22#g306.q

