Vessel

	Bulk carriers are cargo ships used to transport bulk cargo items such as ore or food staples (rice, grain, etc.) and similar cargo. It can be recognized by the large box-like hatches on its deck, designed to slide outboard for loading. A bulk carrier could be either dry or wet.
	Container ships are cargo ships that carry their entire load in truck-size containers, in a technique called containerization. They generally have a large accommodation block at the stern, directly above the engine room.
	Tankers are cargo ships for the transport of fluids, such as crude oil, petroleum products, liquefied petroleum gas, liquefied natural gas and chemicals, also vegetable oils, wine and other food.
	Barges are a flat-bottomed boat, built mainly for river and canal transport of heavy goods. Barges are used for low value bulk items, as the cost of hauling goods by barge is very low. Barges are also used for very heavy or bulky items such as heavy equipment and factory items.
	Roll-on/roll-off ships are cargo ships designed to carry wheeled cargo such as automobiles, trailers or railway carriages. RORO (or ro/ro) vessels have built-in ramps which allow the cargo to be efficiently "rolled on" and "rolled off" the vessel when in port. While smaller ferries that operate across rivers and other short distances still often have built-in ramps, the term RORO is generally reserved for larger ocean-going vessels.