The ships that transport goods are called cargo ships. Ships mainly refer to modern ships powered by mechanical wheels, which enable people to trade between different regions of the world. Today, a large number of different types of cargo ships built by various countries are sailing on the sea surface, ranging from large oil tankers to small tugboats, from loaded ferries to specially designed ships for searching for damaged vessels. Cargo ships rarely have upper structures (the part above the main deck). There is a navigation bridge with a chimney on board. There are engines and living quarters under the bridge. The rest of the ship can accommodate as much cargo as possible.

The ships that transport goods are called cargo ships. Ships mainly refer to modern ships powered by mechanical wheels, which enable people to trade between different regions of the world. Today, a large number of different types of cargo ships built by various countries are sailing on the sea surface, ranging from large oil tankers to small tugboats, from loaded ferries to specially designed ships for searching for damaged vessels. Cargo ships rarely have upper structures (the part above the main deck). There is a navigation bridge with a chimney on board. There are engines and living quarters under the bridge. The rest of the ship can accommodate as much cargo as possible.

Liquefied natural gas ship (LNG ship or LNG transport ship) refers to a "vessel" specialized in transporting liquefied natural gas. It is a "sea super refrigerated vehicle" that carries LNG at minus 163 degrees Celsius. It is one of the most difficult ship types to build in the world and one of the three "pearls in the crown" of the shipbuilding industry. The earliest LNG ship was the 5100 square meter "Methane Light Duo" converted from an ordinary old oil tanker in the United States in 1958. According to the structural form of the cargo tank, it can be divided into independent tank type and membrane type. Newly built liquefied natural gas ships, especially large ones, often adopt membrane structures. The equipment of liquefied natural gas ships is complex.

The ships that transport goods are called cargo ships. Ships mainly refer to modern ships powered by mechanical wheels, which enable people to trade between different regions of the world. Today, a large number of different types of cargo ships built by various countries are sailing on the sea surface, ranging from large oil tankers to small tugboats, from loaded ferries to specially designed ships for searching for damaged vessels. Cargo ships rarely have upper structures (the part above the main deck).