Useful. According to the provisions of the Ship Safety Law, a pilot with a certificate of competency as a second-class captain must carry the certificate of competency as a second-class captain when he takes up his post on board, otherwise he may not work on board. Holding the second-class captain qualification certificate is also conducive to safeguarding your rights and interests. For example, when confirming the labor relationship between the employer and the driver, the employer can propose the driver's course with the second-class master certificate, so the second-class master certificate of fishing boats is useful.