Dear Sir,
Thanks for your valued feedback.
Our sellers add the required category for each boat they list, and whilst we endeavour to make sure this is 100% correct its an ever changing landscape!
This is what I would you do:
You can do a keyword search on narrowboats which will link you to this page: https://www.rightboat.com/gb/category/canal-and-narrowboats-for-sale?order=created_at_desc
Also a category search using this page https://www.rightboat.com/gb/category/canal-and-narrowboats-for-sale?order=created_at_desc
Browse by category canal boat, narrow boat, liveaboard, river boat - this should give you the boats you are looking for and you will be able to do an advanced search from here, by price, length, location etc.
Hope that helps! Kind regards
Nicky