How many years does it take to study for the major of marine ship and engineering?

Doctoral degree in marine ship and engineering generally takes 3-4 years. This time depends on different schools and courses, and may change due to different personal learning progress. During the period of studying for doctoral degree, students need to complete certain tasks such as course study, research project and thesis writing. At the same time, you can also enrich your academic experience through internships or participating in scientific research projects. It should be noted that the study time of doctoral students may also change due to delays or other factors.