On many boats the four legged crew rule. It is no exception on our boat. Kita has worked out well as a boat dog, too well.
She has her friends and feels free to go visiting when she pleases. At home, she prefers walking on boats, so she merely jumps from boat to boat, foregoing the docks when possible.
I keep a leash on Kita while at sea. She has fallen off the dock and has no interest in jumping in. On the boat, she perfers the cockpit floor, which suits me just fine. A large bone and she is set for a lake crossing. I do not put on her life jacket on unless I am sailing alone, or the weather is really rough. It restricts her comfort level and she tends to not want to lie down when she wears it.