After obtaining the corresponding diploma, apply for the exam. Official website showed that the people's government of Jiaodong District, for the second officer of Class A, needs to have a college degree or above and complete the navigation-related major; You should also complete the medical training on board and get the training certificate. Without a diploma, you can also obtain the corresponding diploma and then apply for it. The first mate refers to the pilot of the ship, the person in charge of the deck department (driving department) and the main assistant of the captain.