On Jul 4, 12:22*pm, "Ernest Scribbler"
wrote:
"Roger Long" wrote

The mini houseboat fellow won't get very far trying to apply what he reads
about GM in a standard textbook to his problem.

My guess from the OP's photo is that he has a tri-hull, of typical heavy
60s-style construction. If he goes through with his hard-top plan, I'm
thinking he'll end up with something akin to a pontoon boat.

Here is a neat program that will give you some pretty basic ideas of
rightingmoments, bouyancy, trim, etc..

http://carlsondesign.com/#Fun_Shareware

It's shareware, but for a quick idea of a design and it's capability,
it is ok..