Cargo ship

A cargo ship is a vessel designed to carry cargo, from one place to another. Kinds of cargo ship include:

Container ships	carry standard sized twenty-foot equivalent unit (TEU) shipping containers. These containers are stacked, like children's blocks, and locked together.	Loading a container ship.
Tankers	carry liquid cargo, like petroleum products, or, possibly water. A subset of tankers are designed to carry cargo that can only be kept liquid if it is kept very cold, like liquid natural gas (LNG), or liquid Oxygen, liquid Hydrogen, liquid Nitrogen.
Ro-ro ships	(short for) "roll-on, roll-off", carry vehicles that can drive aboard under their own power, like automobiles, or military vehicles.	Note the vehicle ramps this ro-ro vessel can deploy for loading and unloading
Refrigerated ships	carry perishable food, like fruit, or meat, that would spoil if it weren't kept cold.
Bulk carriers	large holds carry powdered or aggregate cargo, like coal or gravel.	The bulk carrier Captain Henry Jackman is deploying her unloading boom.