We are thinking of getting a small boat (cabin cruiser). As our cat is fairly adaptable and likes being with us all the time, I envision him on this boat

DH assures me that the cat can SWIM. I, on the other hand, keep saying that I need to put him in the water so I know he can swim and see that he can get out.

I think about my Sister and her backyard pool. Each dog she has had, she put it in the pool and made sure it knew how to get out. She even got a tiny ramp thing for her Yorkie's because the pool doesn't have steps

So.....who is right? Me or DH? Do domestic cats naturally swim? Should he get the swim test?