My family use to take our Papillion and Sheltie on the boat with us, out on the lake. We don't go as much as we use to, and both dogs are seniors now.
Actually, my family is kinda crazy. We use to load up the 2 dogs and our Cockatiel and head to our cabin. My dad would put the bird outside in a tree, take the dogs out on the boat and that's how we would hang out. One day, the bird's wings needed to be clipped but dad was going to be a dare devil and put him outside anyway, Sonny, the bird, took off out of the tree, flew out over the lake, swooped back, and landed in another tree, much higher up. Dad tried to catch him in a net, Sonny flew his path again, and ended up hitting a power box and crashed, poor little guy was fine, but his trips to the lake have since ceased. He's still alive...
The Pap tried to jump out of the boat when she was about 5 months old, Dad caught her over the side of the it, I was driving, she never tried it again and loved the boat from then on...she did have her life jacket on, however.