Kitty cruising!
I should offer the disclaimer that while I have co-habited with numerous cats on land, I have never cruised with one, nor have I lived on board with one (although I have done both with a dog - never again!)But, I have had several close friends with cats on board, and they seem to be, by far, the best boat pets. The four things I learned from these friends were: First, check out what issues like quarantine or shots are relevant to your projected cruising area. Second, when you move your boat, make sure the cat is kept on board for the first few days at each new destination. Third, make sure the cat swims, and that you have a line or towel or something draped over the side and into the water. The cat can climb out of the water and back on board that way, should it fall in....and they DO fall in. They swim quite naturally, but may need to be thrown in (!) so that they get used to the idea and know where their "ladder" is. Finally, and most amazingly, I know several cats that were trained to use the head!!!!!!!!! Apparently, you put the litter box right next to the head, and up on the same level as the seat. Over a period of time, you then move it on top of the head. Then you cut a small hole in the middle. Then you gradually increase the size of the hole until there is not much litter box left. The cat gets used to the idea of dangling over the bowl of the head. Eventually, you get rid of the box and, voila! I would love to observe this whole process, but, I absolutely swear this is true, and there are quite a few offshore cats that are trained this way. Actually, since cats are very clean animals and pretty smart, this is not so outlandish as it sounds. Now....if you can figure out a way to get the cat to manipulate the valves and flush, I will relay THAT gem back to my feline afficianado friends! Good luck. Let us know how this goes.