The Middle Level, apart from its flood protection role, is also the fourth largest navigation authority in the United Kingdom and is responsible for approximately of statutory navigation and operates six navigation locks. The Nene-Ouse Navigation Link forms part of the Middle Level Navigations. The Link is at present is the only connection between the Great Ouse and the Main Canal Network. During a normal summer, over 1,000 passages of the Link-Route are made by pleasure craft. The Commissioners issue Navigation Notes, which provide navigation details for boat owners, who wish to use the system.
