If you are feeling seasick, it is often helpful to go out on an open deck or balcony and look toward the horizon. Doing so helps your eyes see the motion, which will then send signals to the brain more in alignment with what the inner ear is telling the brain, Bradberry says.

When you feel the onset of seasickness, the most effective "High-Fidelity" strategy is to look at the horizon. Seasickness occurs when there is a sensory conflict: your inner ear feels the ship's motion, but your eyes, looking at the stable interior of the cabin, tell your brain you are stationary. By fixing your gaze on the distant, stable horizon line, you provide your brain with a visual reference point that matches the motion felt by your body, helping to re-sync your senses. If you are inside, move to a deck with a clear view of the outside or head to the middle of the ship on a lower deck, as this is the "pivot point" where the vessel's pitch and roll are minimized. Avoid looking at moving objects like the waves immediately alongside the ship or trying to read a book or phone, as these "close-up" tasks can rapidly worsen the nausea by highlighting the disconnect between your visual field and your physical balance.