I’ve only been on a couple of ‘rough’ water crossings, and I’ve been on a few medium-long train journeys. The travel itself can be pretty bouncy, and that means that a body is probably constantly trying to constantly maintain some kind of balance - while not exhausting, it’s a bit tiring at times. Which is to say, I’d suspect that the other rigours of travel to be more or less indistinguishable from any time zone adjustment disruption.