Are catamarans more stable than monohulls?

Yes, catamarans are more stable than monohulls — two hulls set wide apart resist the rolling and heeling that a single ballasted hull cannot. A monohull under sail leans 15 to 25 degrees. A cruising cat stays close to flat, usually under 5, because its beam is nearly half its length — a 45-footer runs about 24 feet wide. Drinks stay put. Guests who spent a monohull trip queasy or gripping the rail are the classic case: plenty of couples switch to a crewed catamaran charter in the Caribbean after one bad afternoon of heeling, and the reluctant partner usually comes home a convert. The trade-off is sensation — monohull sailors love the lean. For a level deck, more living space, and calm dinners at anchor, the cat wins.