Ooh, I feel your pain. My first divorce, one of our cats had bonded with me like no other, so even tho it was seriously inconvenient for me to keep him, there was no choice. Poor guy was our wild and energetic barn cat, didn’t do well on my boat, and HATED sailing. Yes,
pets DO get sea sick, and I never found a way / cubbyhole / anything to help him tolerate my/our new life.
Some years later, a couple showed up at my dock, they had bought a boat to
cruise, and I met them when they arrived at my marina in their suburban, with their two big
dogs and a cat. Their (project) boat was uninhabitable, so they stayed at a local non-pet-friendly
hotel with the three animals in the back of their suburban. I convinced them to let me keep their cat on my boat until they could move aboard.
A few months later I came home, noticed my
cockpit wasn't quite right … and hey, what is this blood all over the place ?!?!?!
Well, they had gone sailing, their cat HATED it, so when they got back to the dock the cat ran back to my boat to hide. The blood in my
cockpit was from the owner trying to get his cat, and his cat attacked him badly.
There are MANY successful cruising kitties, but AFAIK, a dirt kitty can’t usually/easily be converted to a sailing kitty. I LOVE cats, and am so old I will likely never go cruising, if I wasn’t so done with the shedding and litter box duty I would give them a home for you. Some other cat lover out there will give them a home tho, keep trying.