Jo Bell isn't the only boating poet. Rod Dungate says he's one too:
Writing On Water: A collection of poems about UK canals with photographs by Carl Hopley and Agui da Palma.
See also Rod's blog: roddungate.blogspot.com
But the blog is only partly about boating - in his case, as a co-owner of Challenger shared-ownership boat Centurion - so I don't know it counts as a truly boating blog.