A water-tight structure (as a large box or boxes) used to assist a vessel in passing over a shoal or bar or in navigating shallow water. By admitting water, the camel or camels may be sunk and attached beneath or at the sides of a vessel, and when the water is pumped out the vessel is lifted.

a pontoon used to fender between a vessel and a wharf.

floating cluster of logs or a strongly constructed raft

a type of floating dock that's used to lift a ship over shallows on entering or leaving port

large fender float used for keeping vessel off wharf, pier, or quay; usually of one or more logs.

A machine used for lifting vessels over a shoal or bar.

A fender to keep a vessel away from a pier or quay to prevent damage to the hull or pier; usually a floating body with massive padding of rope, tires, etc.