The area of sea below mean high water springs enclosed by a line drawn from a point on the east coast of the Isle of Lewis at 58°30−North latitude 6°13.4−West longitude; then east to 58°30−North latitude 6°West longitude; then south to 58°15−North latitude 6°West longitude; then west to a point on the east coast of the Isle of Lewis at 58°15−North latitude 6°09−West longitude; then north, west and south along the shoreline to 58°15−North latitude 6°11.4−West longitude; then west to 58°15−North latitude 6°19−West longitude; then north along the shoreline of the Isle of Lewis to the point of beginning.