Seasickness or motion sickness is an affliction, which is characterized by the feeling of dizziness and nausea. Seasickness can turn a normally idyllic cruise experience into a nightmare. A recent study had suggested that approximately 14% of the passengers get seasick.
Children are more likely to get seasick. The older you get, the less are the chances of getting seasick. This is because resistance increases with age.
The type of motion associated with the ship also has a direct impact on seasickness. The motion that causes the maximum seasickness is a five second cycle of repetition, generally associated with big ships. On the other hand, if you are traveling on a small boat, your chances of feeling seasick are comparatively less as small boats have a quicker motion period.
Then again, women are more likely to get seasick as compared to men. A study has also revealed that Orientals are more susceptible to seasickness than westerners.
Modern cruise ships take all possible steps to ensure the comfort of the passengers. Most cruise liners are highly stable. In fact they are fitted with stabilizers to cancel out the effect of the ship’s movement. Also, some captains even go to the extent of rearranging their itinerary and skipping ports in order to avoid rough weather.
To ensure that the passengers do not get seasickness, most cruise liners have arranged their itinerary in such a manner that you have only short periods at sea. The ships usually move at night when the passengers are asleep; the days are spent exploring the ports on route.
Having said that, you will find that modern day cruise ships are extremely comfortable and the chances of experiencing seasickness are minimal. 
