Is seasickness worse on cruise ships or small boats?

Seasickness is much worse on small boats than on cruise ships — physics, not opinion. A 200-meter cruise ship displaces enough water to dampen most ocean swell into a slow roll the inner ear barely registers. A 50-foot catamaran rides every wave at full amplitude. Same swell, very different motion. Charter sailboats and smaller motor yachts under 30 meters sit in the worst bracket: enough length to take long-period swell, not enough mass to ignore it. Multihulls help. They stay flat instead of heeling, and the wider footprint kills the side-to-side roll that triggers nausea. Caribbean anchorages are protected, so most charter weeks barely register motion at all. Mention seasickness when inquiring and the broker steers toward larger, steadier yachts.