A bulk carrier, bulker is a dry cargo designed to transport bulk cargo: grains, coal, iron ore. Size categories: Handysize 10,000 - 35,000MT; Handymax 35,000 - 59,000; Panamax 60,000 - 80,000; Capesize 80,000MT and over. Six major size categories: small, handysize, handymax, panamax, capesize, and very large (ore carriers). Mini bulkers under 10,000 DWT are designed for river transport. Geared bulk carriers are typically in the handysize to handymax size range. Cranes, derricks or conveyors that allow to load or discharge cargo in ports. A tanker (tank ship, tankship) is a vessel designed to transport liquids in bulk. Types: oil tanker, chemical tanker, and liquefied natural gas carrier. Products carried: hydrocarbon, oil, liquefied petroleum gas (LPG), and liquefied natural gas (LNG), diesel, MDO, IFO, gasoil, jet fuel, refinery products, chemicals, ammonia, chlorine, eatable oil, molasses etc. Supertankers are designed for transporting oil around the Horn of Africa. VLCC. ULCC. Seawaymax, Panamax, Aframax, Suezmax. DWT. Dry cargo ships. A cargo ship, freighter carries cargo, goods, containers, geared with cranes or gearless. Dry cargo ships today are bulk carriers and container ships. Specialized ships: heavy lift, refrigerated cargo. Roll-on/roll-off cargo (RoRo). Ferries. Wheeled cargo, automobiles, cars, trucks, semi-trailer trucks, trailers or railroad cars. PCC vessels. ROPAX. ConRo vessel. RoLo (roll-on lift-off) vessel. A tugboat (tug) is a boat to maneuver vessels by pushing or towing them.