A ferry is a ship designed to transport people or vehicles across the water on a regular schedule. Ferries generally cover only short distances in protected areas and are not designed for the open sea. The distinction between a ferry and a steamer is a blurred one, though, especially in the waters around New York City, where the same company might operate a cross-river vehicle and passenger ferries, and cross-bay passenger steamers, all for the same commuter service. Some ferries even carried rail cars.