Swim Stirrup. Part #: 1466. The Swim Stirrup provides safe, easy access to small boats for swimmers or water skiers. Durable, reliable design attaches to gunwales, transoms or open bows.. Features:. Perfect for rowboats, ski boats, dinghies, sailboats. Adjustable length to fit your boat. Complete hardware and isntructions included. Easy to install, easy to use - it even floats!