The chief engineer is in charge of the ship's hardware. Generally speaking, China's "old track" refers to the chief engineer, and there are engineers below, which are also divided into several grades.

Responsible for housekeeping. For example, what food should be bought in the kitchen on board, and so on. , are the number one.

Chef, this profession is inseparable from anywhere.

Ship doctor, same as above

The third mate, the second mate and the first mate are admitted to the first class cabin, and they are only qualified to take the captain test after being promoted to the first mate for a period of time. One piece's "sailor" refers to the profession of first mate. They are responsible for choosing routes and driving. Usually work in shifts and need the assistance of the second mate when driving, which is commonly known as "driving assistance". The climate at sea is complex, so in case of emergency, the captain should be asked to command himself.

Captain, I won't say much about this.

There is also a profession that cannot be ignored: pilot. They are fixed in various ports with complex terrain and are responsible for guiding ships in and out.

It is said that there used to be political commissars on domestic ships, who were responsible for ideological work. I wonder if there is one now. ...

According to pirates, there must be musicians ... but it's not necessary. .....

PS: Sailing is a very complicated and technical job. Although One Piece is good-looking, I hope everyone will not be misled by it. In real life, without a group of highly skilled people, enthusiasm alone can't sail a boat.

Finally, I recommend a book, Captain of the Sea by Shi.