Hey,

To join the Indian Navy after 12th PCB, you can study PCM (Physics, Chemistry, and Mathematics) in your 12th. If you qualify, you'll need to appear before the Services Selection Board (SSB).

To qualify for the Indian Navy, you must: Have 60% aggregate marks in Class X and XII, have a minimum of 60% marks in English in Class X or XII, have a minimum age of 17 years and a maximum age of 25 years, have a valid and current CPL issued by DGCA(India)

You can also apply for IN officers' entry if you have: 10+2(B. Tech), 12th pass with 70% in PCM and 50% in English in 10th or 12th standard

If you want to join the Navy, you can choose Navy INA as your first choice and Navy NDA as your second choice.

For more information please visit : https://www.careers360.com/careers/articles/how-to-join-indian-navy-after-12th-counar

Hope this helps you.