The Humber keel Comrade is a rare surviving example of a type of craft evolved to work the difficult Humber Estuary, and its tributaries and canals. She was built in 1923, at Warrenâ€™s shipyard at New Holland, and was originally named Wanda. At 61ft 6in in length and 15ft 6in in beam, she had a hold capable of carrying over a hundred tons in cargo.
The Humber is very much part of Viking invader territory, and I do wonder how much this unusual square sail may owe to those invaders of more than a thousand years ago.
For more on Comrade and her sister ship Humber sloop Amy Howson, see http://www.keelsandsloops.org.uk/