I am looking at a sailing catamaran with only a 15 foot beam, on a 40 foot boat. It is a home build and I do not have a lot of information about it yet. It was disigned to have twin mast, side by side. However the rig has been removed. Is a 15 foot beam considered safe, for ocean cruising? The boat has a large cabin, so there is a fair amount of windeg. It also dose not have dagerboards. The hulls are glassed over ply. any help would be great.