Yacht ‘Sea Pigeon’ contacted Exmouth NCI concerned that yacht was entangled with mooring buoy. NCI informed HMCG and that Exeter Harbour Master will assist. NCI advised ‘Sea Pigeon’ to liase with Harbour Master on Ch12. Notification from vessel ‘City of Exeter’ on Ch65 that ‘Sea Pigeon’ freed and underway. NCI informed CG.