Will you please tell me which course should I do to join Indian Navy?????

You can join the Naval Academy either through NDA/NA examination and through 10+2 B.Tech Entry after 12th or you can join it after Graduation.

Here are the ways in which you can join Naval Academy:

NDA/NA Entry:
-Through his only male candidates who are between the age of 16 ½ - 19 ½ years of age and have Physics and Math’s in 12th can apply.
-NDA cadets opting to join the Navy complete three years of joint training at NDA, Khadakwasla with the Army and Air Force cadets.
-They then transfer to INA for the next one year.
-Cadets have the option to major in Electronics & Communication Engineering, Mechanical Engineering or Naval Architecture and are awarded a Bachelor of Technology degree upon graduation.
-Upon graduation, cadets are commissioned as Sub Lieutenants in the Navy.
-Cadets majoring in Naval Architecture have to undergo an additional 6 months of training at the Naval Dockyard, Visakhapatnam after graduation.
-They also have the option to enroll for additional post-graduate specialization in the field at the Indian Institute of Technology, Delhi.

Through 10+2 B.Tech Entry:
-This is a new entry of Navy.
-SSB calls are made directly to male candidates having the 12th percentage above the cutoff percentage.
-Selected Candidates will be inducted as Cadets for four year B Tech course in Electronics & Communication or Mechanical Engineering at the Indian Naval Academy, Ezhimala Kerala.
-During the course, Cadets will be allotted Executive or Engineering including Naval Architect specialization or Electrical Branch. On completion of the course, B Tech Degree will be awarded by Jawaharlal Nehru University (JNU).

Through CDSE (Combine Defence Service Examination):
-Male graduates who have B.Sc. with Physics & Mathematics or Bachelor of Engineering can apply for Naval Academy
-The written exam consists of objective type paper having Math’s, English and GK. The successful candidates of written exam are called for SSB and further for medicals.

Other Graduate Entries:
-Through this graduates and final year students (Pre final year sometimes for UES as well) can apply.
-There is no written test, the calls are directly made for SSB based on cut-off percentage of the qualifying exam.
-There are many entries for all types of graduates in Indian Navy.
-However you have to keep a watch on the advertisement of the applications, which can easily do