Examples include quays, wharfs, jetties, piers, anchor buoys, and mooring buoys. It roosts on rocks, water, rocky cliffs, piers, jetties, sand beaches, and mudflats. They may also roost on mudflats, sandbars, beaches, reefs, jetties and pilings. There are two major cargo jetties on Jurong Island, namely Sakra Jetty and Banyan Jetty. Coastal engineering can involve the design and construction of wharves, marinas, and jetties. In addition, the river was lined with innumerable warehouses, piers, jetties and dolphins (mooring points). Some species also rest on man-made structures, like piers, jetties, buoys and oil platforms. Both originally referred to jetties or wharves. They live in and around inlets, points, jetties, and sandbars. A new coal jetty was built to the north of the two existing coal jetties. Marine cathodic protection covers many areas, jetties, harbors, offshore structures. Formation of such sandbars is now managed by a system of jetties. Despite the jetties and dredging, the harbor entrance remains challenging. Made from fibreglass, they may be used to land vehicles without jetties or harbour facilities. Ernakulam has a number of jetties where passengers can embark and disembark from ferries.