A chain ferry is a type of boat that uses a chain to move across a body of water, typically a river or a narrow channel. It is anchored at both ends and is pulled back and forth by the chain, which is attached to a fixed point on the shore. This design allows the ferry to transport vehicles and passengers without the need for a bridge. Chain ferries are often found in locations where building a bridge is impractical or too expensive. They provide a vital link for communities, allowing easy access to both sides of the waterway. Examples of chain ferries include the Havengore Ferry in the UK and the Bakerloo Line ferry in London.