Hello,

Hope you are doing great.

According to your question, you can either go for the completion of the course again or else you can just enroll yourself in NIOS programme as well. As recently the Directorate General of Shipping accepted the NIOS syllabus on par with the regular syllabus. So, what matters is only your skills and knowledge for your chosen dream. Study either way but study in a perfect manner,

Hope this helps!!