Hey Roshan ,
The eligibility criteria of technical entry scheme navy is as follows

1. The candidate should be a citizen of India or subject to friendly countries

2.age limit for candidate :16.5 to 19.5 years

3. Should have Physics , chemistry and Maths as his subject in 12th with minimum 70 percent in them

4.the candidate should have appeared for jee and scored a minimum score of 15
All the best