First is through NDA entrance: 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. 

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.

Through CDSE: Male graduates who have B.Sc. with Physics & Mathematics or Bachelor of Engineering can apply for Naval Academy.

Hope this helps.

All the best.