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 Warren’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/