What is the main cabin of this ship?

The main cabins in the ship are all complete. A cabin generally refers to a room on a ship. Although the ship design is complex but orderly, it mainly consists of two parts: the main hull and the superstructure. The main hull is usually the part below the upper deck, and its interior consists of longitudinal and transverse staggered bulkheads, which divide the main hull into independent compartments. These cabins include engine room, ballast tank, oil tank, fresh water tank, isolation tank, anchor chain tank, waterproof tank, cargo tank and so on. Cargo hold can be divided into bulk cargo hold and liquid cargo hold. These cabins have their own special purposes, and they provide a guarantee for the navigation of ships. The unique ship type is the ro-ro ship. There is no transverse bulkhead inside, only a large cargo hold for loading cars. Usually the upper deck is called "cabin" below and the superstructure is called "room". The functions of rooms are different, and the number of rooms is also different. "Rooms" include cab, captain's room, infirmary, etc. Generally, passengers and crew on board live in living quarters, including living quarters and public places. The cabins where the crew live are divided into Class I cabins, Class II cabins, Class III cabins and Class IV cabins according to their duties. Some cabins are not just for living. China has relevant standards for the design and layout of ship cabins. Each cabin has its unique and irreplaceable function. This kind of cabin provides better navigation conditions for ships, and also provides convenience for people's life on board.