Did some seasickness trials at HMS St. Vincent around 1963/64 as a young Naval Artificer. They were testing the effectiveness of various preventative pills and patches. Twenty men/boys sat in a closed rubber life raft, in a swimming pool with a wave making machine, for about 4 hours on a Saturday morning. We were given various treatments and everyone vomited into the raft within fifteen minutes. None of the treatments worked and we sat there in a sea of vomit and urine for the rest of the 4 hours. The air inside the closed raft was putrid. As volunteers we were paid the princely sum of 1 Pound Sterling for our efforts. As our weekly wage was only 1 Pound 10 Shillings it was well worth it. I did it for all four Saturdays that the trials lasted, each time I swore, never again. If you ever end up in one of those life rafts, you are going to be violently sick, no matter how good a sailor you think you are.