Navy Instructional film explaining the technicalities of securing a warship to, and slipping from, a harbour mooring buoy. Emphasis is on preparing the fo'c'sle, and buoy jumpers (men actually on the buoy itself to secure or release lines). There is no mention of navigational aspects. A section at the end gives an explanation of technical terms used. Filmed onboard the Whitby Class frigate HMS Eastbourne (F.73).