Naval Officer

Yes, you can join as Electro Technical Officer (ETO), do the ETO course from Anglo Eastern Maritime Academy or Great Eastern Maritime Academy as both are best in terms of placements.

Wow that's great. Just click the link for detail:
https://www.shiksha.com/careers/merchant-navy-officer-77
All the best.

Below are the rules and regulations in merchant navy.
1. Punctuality
2. Drinking
3. Sobriety is essential to the basic functioning of manpower onboard a merchant ship
4. Smile and Greet
5. Documentation and safety gears
6. Safety First. Follow rules.
7. Listen and understand instructions carefully, any doubt Ask | Reporting after job
8. Offer help to others
9. Socializing after work hours different nationalities, different gender
10. Shore leave
11. Careful with drug and alcohol policy and sexual harassment policy
12. Productive in free time
13. Smoking
14. Good Behavior towards Colleagues onboard.

Merchant Navy Institutes
C. V. Raman College of Engineering Bhubaneswar
InstituteofMarineEngineers (India) Kochi
Indian Maritime University (National Maritime Academy) Kochi
Kunjali Marakkar School of Marine Engineering of Cochin University of Science and Technology. Kochi
Univan Maritime Training Academy Kochi.

The best colleges for merchant navy is mentioned below:
1) Tolani Maritime Institute (TMI)
2) Samundra Institute of Maritime Studies- Mumbai
3) International Maritime Institute (IMI) Delhi
4) Vels Academy of Maritime Studies Chennai
5) Maharashtra Academy of Naval Education and Training (MANET) Pune
6) Institute of Technology & Marine Engineering (ITME) Kolkata
7) B. P. Marine Academy Navi Mumbai
8) TS Rahaman Mumbai
9) Indian Maritime University (IMU) Chennai
10) Coimbatore Marine College (CMC) Coimbatore.

The minimum requirements in respect of new entrants are [1] :
Height 157 cm. (5'2")
Weight 48kg (105lbs. )
Weight to be proportionate to height and age, 10% acceptable, Average values are enclosed herewith. In case of Lakshadweep, Amindivi, the Andaman and Nicobar Islands, Gorkhas, Nepalese, Assamese and other hilly areas, including those from Nagaland, Mizoram, Meghalaya, Arunachal Pradesh, Manipur, Tripura, Garhwal, Sikkim, the candidate's height may be reduced by 5 cm. (2") and proportionately the minimum weight should be 45 kg. (100lbs).

At this stage be focused on your study and your upcoming board exams. After this there are two 2 ways of joining Indian Army after 12th:
1. NDA & NA Examination:
The NDA entry is open twice a year. Form availability - Mar and Oct, notified by UPSC.
2. Technical Entry Scheme -TES (For High School Science Graduates):
The TES entry is open twice a year.
For more query you can go with this link:
https://www.joinindiannavy.gov.in/en/faq/faq/index/apply-online?url=/webroot/en/faq/faq/index/officer

Hi!
Kindly refer https://www.shiksha.com/careers/merchant-navy-officer-77.

It all depends on your wish and your interest. Being a PCM student, there are a lot of opportunities open for you. Merchant Navy is a very prestigious and good field. If you have the desire to go into this field, you must go.
Best of luck for your future.

After completing btech there is various posts in merchant navy which open after graduation.