Dear Kuldeep, you should complete your 12th in Physics, Chemistry and Mathematics.You need to appear for IMUCET which is Indian Maritime University Common Entrance Examination followed by a screening test and a written examination. And you also need to successfully complete a Ship Training Course before placement. There are Private Institutions as well which train you for the posts of Deck Cadets and Marine Engineering jobs. The other Entrance Examinations are MERI and TIMSAT. Alternatively you can appear for JEE and study any of the courses in various streams of Engineering like Marine Engineering, Naval Architecture and Offshore Engineering, Petroleum Engineering, Mechanical Engineering, Civil Engineering, etc and then get placed in Merchant Navy.

Hey kuldeep, Greetings!!

To set merchant navy as your career you have to appear for IMU CET exam after 12th. Indian Maritime University Common Entrance Test (IMU CET)is an all India online common entrance tests managed by the Indian Maritime University and is for everyone who wishes to join the coveted profession of Merchant Navy. A candidate can enroll for an undergraduate and postgraduate program under IMU CET. All the programs and courses are offered byIMU (Indian Maritime University)and its affiliated Institution.

Eligibility Criteria of IMU CET 2019

Age Limit - General category candidates should be minimum 17 years and maximum 25 years old as on August 1, 2019. Maximum five years age relaxation is provided to SC/ST category candidates.

Academic Qualifications - The candidates should have passed 12 th standard qualifying examination with aggregate marks of 60% in Physics, Chemistry and Mathematics. Atleast 50% marks should have been secured by the candidates in English . For SC/ST category candidates, there is a relaxation in marks. However, no relaxation will be provided in English.

Medical Fitness - A medical certificate issued by doctors who are approved by Director General of Shipping has to be produced by the candidates applying for Marine Engineering. Physical fitness certificate from registered medical practitioner has to be provided by the candidates applying for B.Tech (Naval Architecture and Ocean Engineering) and B.Sc (Ship Building & Repair).

Moreover, for futher details refer the link given below

https://engineering.careers360.com/articles/imu-cet

all the best!!