How to Join the Indian Navy Without Giving the NDA Exam?" If you want to serve in the Indian Navy but don’t want to go through the NDA (National Defence Academy) route, don’t worry — there are multiple alternative entry options available based on your education and interests. Here’s how you can join: 1. 10 2 B.Tech Cadet Entry Scheme Eligibility: Passed 10 2 with Physics, Chemistry, Maths (PCM) and appeared for JEE Main (usually top 20–30k ranks). Age: 16.5 to 19.5 years. Selection: Shortlisting