Choosing the right cruise is critical if you are susceptible to seasickness; large vessels are the best choice as they’re very stable when sailing. If you do not like large vessels, then we recommend choosing a nice catamaran (twin-haul), which also offer smooth sailing for passengers’ comfort.
You can also ask your doctor to prescribe you medicine to help you contrast the effect of the motion when sailing; it is also important to be properly hydrated during your cruise as this also helps prevent the effects.