A. The main distinction is their qualifying conditions and length. A Graduate Degree in Mechanical Engineering or Naval Architecture is required to apply for a Graduate Degree in Marine Engineering. In this one-year Diploma Degree, participants receive instruction in Maritime Engineering. Applicants pursuing the Diploma in Marine Engineering, on the other hand, must have completed class 10th or 12th with a scientific stream. The duration of the Diploma Degree might range from one to three years.