Naval Officer

There are two ways after class 12th for Indian Navy
NDA & NA Examination: You can join NA by taking the exam conducted by Union Public Service Commission (UPSC). This exam is conducted twice a year in all major cities throughout India.
Eligibility Criteria:
Age 16 to 19 years (at the time of commencement of course)
Nationality Indian
Gender Men only
Educational Qualifications 10+2 with Physics and Mathematics. Appearing final year students can also eligible to apply.
10+2 B.Tech Cadet Entry:
Age: 17 to 19 years. Educational Qualification: Passed Senior Secondary Examination (10+2 Pattern) or its equivalent from University/Board with at least 70 % aggregate marks in Physics, Chemistry and Mathematics (PCM) and at least 50% marks in English (either in Class X or Class XII).

Indian Navy Selection Procedure on the basis of JEE Main 2019
Once the registration will close, applicants will be shortlisted for Service Selection Board (SSB) interview on the basis of JEE Main AIR (All India Rank). Shortlisted candidates will be informed about their SSB interview via E-mail or SMS as details provided by them in their application form. The SSB interview is conducted in 2 stages I. e. Stage I- group discussion, intelligence test, and picture perception test. Stage II- This test will last for four days and consists of psychological testing, group testing and interview. If candidates qualify stage II, they will undergo Medical Examination that lasts approximately 03-05 days. The training is scheduled to start in the month of January. The Indian Navy will bear the entire cost of training. Free clothing and mess service will also be provided to the cadets.

AFCAT (Air Force Common Admission Test) is an entrance test for aspirants willing to join Indian Air Force as Commissioned Officer in Flying, Ground Duty (Technical) and Ground Duty (Non-Technical). The examination is conducted twice a year in February and August. The test is conducted all across India by the Indian Air Force. AFCAT Eligibility for Flying Duty: - Minimum of 60% marks each in Maths and Physics at 10+2 level.
Graduation with minimum three years degree course in any discipline from a recognized University with a minimum of 60% marks or equivalent.
Or, BE/B.Tech degree (Four years course) from a recognized University with a minimum of 60% marks or equivalent. So, you are not eligible for AFCAT. Now, for Indian Navy the requirement is class 12th with PCM, if you wants to go through the NDA (National Defence Academy) entrance exam. So, class 12th commerce students are not eligible here.