Gdavid
Guru
Maybe I should try repeating my question, I don't know...
I know about motion sickness, I am not interested in studying motion sickness. The question is not about motion sickness. Please do not talk about motion sickness any more.
The question is whether passengers will be able to pass long stretches of time in a way that is not going to be tortuous for them in ocean conditions. So by typical ocean conditions, I mean an ocean fetch with 10 knot winds, so about a 2 foot swell.
Most people will want to read or work on the computer. Other stuff, like watching a movie or working in the kitchen will be possible, but reading and computer are going to be the most common desires. Is this going to be difficult or uncomfortable for the "average" person in 2-3 foot seas?
I have been on the Long Island ferry many times and I have never had a problem reading or working on the computer and there seems to be very little motion, however, the ferry is a 300-foot boat so the experience in a 40-foot boat might be completely different.
I believe the only way this could be accomplished with any reliability would be requiring medication taken well in advance of the trip. I don't see how you would accomplish this unless you know all of your passengers well and trust them to be responsible. Different medications work differently but from what I have seen they all should be started 12 hours or longer before the trip for best results. If you cannot ensure this will happen you won't be able to control the physical and psychological factors that contribute to seasickness whether they are staring at a screen in a hold or standing on deck.
It sounds like you are considering a significant number of passengers and period of time. If you don't mind my asking, is this an business enterprise you are considering or just for recreation/private trips? Good luck either way.