We keep our little splitter at Stalham at the top of the Ant, as Ditchcrawler says there are quite a few narrowboats on the Broads but not many full length ones - about 45' is probably the maximum for easy turning in the narrow bits. Air draught - 7' will get you under most bridges after a check of tide tables. Potter Heigham is the exception - plenty of footage on YouTube. Mark99 - if you give us a go,avoid the school holidays, the Northern rivers will be heaving with Stella'd up holiday makers in hire boats. Out of season, however, the Broads are idyllic!