This is going to sound strange. But I'm trying to sink it using non-conventional methods. It's a science project. I'd imagine it will be a low end yet sturdy vessel.
Low end and sturdy pretty much defines a Hobie 14 or 16, but they are essentially unsinkable unless the flotation blocks are removed. (There's a big block of styrofoam in each hull that will keep the boat afloat even if the hull is full of water.)
