Wow, go back for that? Must be some serious forms of seasickness that I'm totally unaware of. Last time I went out on a "puker" boat was with some gun club guys who very kindly invited me along. There were about 25 or 30 of us, including wives. The captain said he was taking us to a special spot about 30 miles offshore. But we weren't even a mile off Bodega Bay before people began demanding to be taken back. Captain was a crusty old guy and flat out refused. Probably half-a-dozen people were completely incompacitated the entire day. Six to eight foot seas, 30 miles out, fish all day, 30 miles back. I don't think the captain would've gone back for a heart attack, lol. Got to hand it to him, though, the fishing was unbelievable.
Don't forget these are private charters, and not headboat charters. Big gun business people would be onboard with him. You don't want to make people suffer who can hurt you financially.
One day the owner of a major league baseball team kept the seasick head of a TV company out with us all day. He was able to do that because the baseball owner also owned the TV company.
When we got in, the seasick TV guy just got off the boat without saying a word to anyone and left. That won't be forgotten.
In a working man charter many people get seasick but the others vote to stay out. If their bosses are onboard and don't get sick the employees are in for a long day. - tom