The area of sea below mean high water springs enclosed by a line starting at a point on the east coast of Lewis at (58°) 58° North latitude (−6.52523°) 6°31'31" West longitude; then east to a point on the east coast of Lewis at (58°) 58° North latitude (−6.51331°) 6°30'48" West longitude; then south, west and north along the shoreline to the point of the beginning.