How can I become a merchant navy officer?

Merchant Navy Courses after 12th To join as a Deck Officer B.Sc Nautical Science (3 Years) Diploma in Nautical Science (Leads to a B.Sc. Nautical Science. Duration is 1 year) To join as an Engineer BE/B Tech Marine Engineering (4 Years) To join as a Rating after Class X or XII Pre Sea GP Rating Cou