A tacking Harryproa, that is an interesting idea.? I'm the originator of the Tri-harryproa? The idea is if you have a trimaran that doesn't have enough accommodation you substitute an accommodation ama for the flotation ama.? A sidecar trimaran.? there is so much happening with the main hull of a trimaran that often the accommodations are an afterthought, and basically useless.? But as with the Harryproa, if all that is going on in the float is a float with a bubble for accomodations, then you can have a pretty nice space.? Of course it tanks the standard performance of the tri, but that is fine compared to having to make a whole new boat just because one wants to overnight.? One of my uses is just motoring around the river, for which one does not need a lot of performance, but a place to sleep is nice alright.
Speaking of tri accommodations. On the website there is a tri that looks like one of the small cats.? Is it a cat, or is it a tri with a cabin, couldn't find plans for the the latter.