The area of sea below mean high water springs enclosed by a line starting at a point on the north shore of Loch Scridain on the west coast of Mull at (56.38932°) 56°23'22"North latitude (−6°) 6°West longitude; then east, south, and west along the shoreline to a point at (56.38614°) 56°23'10"North latitude (−6°) 6°West longitude; then north to the point of beginning.