Catamarans Still Move

Brokers tell you catamarans don't heel, implying they don't cause seasickness. This is a lie. They have a vicious, short snap-roll in a beam sea that will absolutely wreck a sensitive stomach.

The Snap-Roll Explained

A monohull slices through the water and heels over gracefully. When a wave hits a catamaran from the side, one hull lifts, the boat hesitates, and then violently snaps back level. This jerky motion disrupts the inner ear far more than a steady heel.

The Pharmaceutical Arsenal

Do not rely on ginger candies or wristbands if you are prone to sickness. Use real medication, and take it before you leave the dock.

Scopolamine Patches: The gold standard. Prescription only in the US. Apply behind the ear 12 hours before sailing. Warning: Side effects include severe dry mouth and blurred vision.
Stugeron (Cinnarizine): Highly effective, non-drowsy, available over the counter in the UK/Caribbean (not FDA approved in the US). Buy it when you land.
Meclizine (Bonine): Less drowsy than Dramamine, good for mild cases.

Location is Everything

If someone feels ill, immediately move them to the lowest, most central point of the boat, outside, looking at the horizon. The worst place to be is inside the forward cabins (maximum pitching) looking at a phone screen.

Seasickness Risk Profiler

Assess your crew's risk before you leave the dock.

History of Motion Sickness

Expected Sea State

Common Mistakes

Mistake	The Reality
Taking meds after getting sick	Once the nausea hits, your stomach stops processing. Pills will just sit there or come back up. Prevent, don't treat.
Going below deck to "lie down"	The lack of visual horizon mixed with the boat's motion is a guaranteed vomit trigger. Stay in the cockpit.