Storm and Assault Boats

[Snowtractor]

...the movie supposedly used British storm boats. The Americans needed boats to assault a bridge from both ends at once and whne the British boats showed up they were quite miffed that they were canvas with wood bottom. They were too flimsy in their opinion. However they worked well in practice.
Soooo, if these are the boats, rent the movie to get a good idea as they show the boats being assembled, stowed on trucks , beng put in water, loaded , etc.
I got bought it on DVD for $4.88 at Walmart
Sean