 Since 1861, there has been a lifeboat station to the east of Selsey Bill, and there is a system of beacons that warns sailors of the treacherous
Owers and Mixon rocks that are south of Selsey Bill.The Mixon rock was formerly quarried, initially during the Roman occupation and then was to become an important building stone in the late Saxon period.It's quarrying continued after the Norman conquest and was still being used until the early 19th century.