The area within an imaginary line commencing at a point (50°10′43.64932″N, 004° 58′16.91173″W) then in a straight line in a north easterly direction to a point at (50°11′08.41656″N, 004°58′06.31798″W) then following the level of high water along the coast back to the point of commencement (50°10′43.64932″N, 004°58′16.91173″W) and the harbour premises, as shown outlined red on the Portscatho Harbour Limits Plan.