I got sick on my first dive out after getting certified this year. I had already anticipated this happening since I have gotten seasick before. I too (like another poster) though only get sick when a boat stops. We had 4 foot swells that day, but I was able to keep the nausea down to a minimum. I took some Dramamine that morning but unfortunately only a half dose since I was trying to cut down on side effects (fatigue, slight depression for about a day). I tried to stay as cool as possible, sitting in the shade of the boat and letting the wind hit me in the face. I tried to stare at the horizon whenever possible. By the second dive I was starting to feel queasy, but I knew I would feel better if I could just get underwater because floating on the surface makes me just as sick. When I did get underwater, I felt absolutely no nausea until I started to ascend and then take the safety stop. I had to hold on to the ascent line which was making me bob up and down with the boat. Fortunately I made it back to shore without feeding the fishes (I immediately started to feel better when the boat took off). What I learned is to take the right dosage of motion sickness medication and if not too nauseated to try and get under water as quickly as possible. If however I feel like I might barf then I don't think I would risk diving.