How can you train your cat to stay on your boat?

It's probably safer for you to NOT take cats on the boats. But if you insist, you should try short-leashing them with relible harness, and tie them to the boat... (although if the boat flips, then you'd have to unleash them quickly...) Because most cats are "lean", their fat won't really let them float and swim as well. My male cat might paw the water in curiOSity but would be deadly frozen once he finds out it's ALL WATER AROUND and would just stay put and refuse to move (he also refuses to move when I put harness + leash, which really works well when I don't want them to move - it's kind of opposite of what I had in mind when I harness trained him...). My female cat will be curious of what's going on with the water and fish and all... So I'd have to tie her up if I were to take her. But I have nooooo intention to ever take my cats on a boat! You can try bringing a carrier and put your cats in a carrier -_-...