There are 2 ways in which you can join merchant navy:
1.direct entry after 12th
2. job in merchant navy after doing BE course
Direct entry after 12th:
Direct entry to Merchant Navy is also possible. Students who have completed their 12th with PCM (Physics, Chemistry, Mathematics) are eligible to join as Deck Cadets. Direct entry Deck Cadets are required to undergo basic pre-sea training arranged by the recruiting company itself.
Job in merchant navy after doing BE course:
Candidates wishing to enter the navigational and engineering fields of Merchant Navy need to complete a Bachelors degree in Nautical Science or Marine engineering, before they can gain admission to the field.
Educational qualification: The minimum eligibility for courses in Nautical science and Marine engineering is 10+2 or an equivalent examination with physics, chemistry and mathematics. He should also pass a medical fitness test for sea service under standard norms and with eyesight 6/6 with no colour blindness.
all the best..