The weather condition on my scheduled tour was simply not suitable for sailing. Water was extremely choppy. It was so choppy we were the only boat at Molokini, no other boat out there. This explained how bad the weather was. It was simply unethical to insist operating when the weather was not suitable. I understand that we cannot control the weather, but Calypso can control operating or not. So many passengers were sick and everyone was suffering. The overall mood of passengers was so bad the whole trip. Viator gave me refund but I wasted a day and suffered. The vessel, facilities and crew were great, if should have been a fun day if you were lucky to go on a good weather day, but you would be betting your chance on the weather as this company didn't seem to care if their customers suffer.