I haven’t been on a boat since I was a kid but I get awfully car sick and I bought these for my last road trip (LA to Portland and back) and they look stupid af but they saved me I swear! Worth at least having in my opinion. I’m taking them on my plane to Portland and back in early may! Hopefully these help. And if you can’t see the link it’s motion sickness glasses that are circles with a blue liquid in them making a fake horizon that helps trick your brain that your stationary motion sickness glasses