To get admission in merchant navy, you can apply -

IMUCET : The Indian Maritime University conducts IMU CET entrance exam for various undergraduate engineering programmes for the maritime sector in an online mode.

Eligibility - Candidates must have passed their Class XII with an aggregate marks of 60% in Mathematics, Physics and chemistry. Candidates must have scored at least 50% marks in English in Class XII.

Age Limit - (i) Minimum age- 17 years

(ii) Maximum age- 25 years

Registration : Application window will be open in the last week of March 2018.

To know more about IMUCET 2018 in detail, you can go through the below link -

All about IMUCET 2018

You can also check the participating institutes of IMU and their seat matrix by going through below link -

IMUCET participating institutes and seat matrix

There are other entrances also like TMISAT , WBJEE , CUSAT CAT where you can apply.

Good Luck!!!!