See Candidate JEE MAINS BTECH cadet entry only considers your JEE MAINS Examination Percentile and not the Class 12 Boards marks. The board marks Will be considered in Technical Entry of Indian Army only. According to the previous years Cutoff analysis the students who are scoring around 50 Percentile or more than it will be selected for SSB interview. Now Your rank in JEE MAINS Exam is around 3,20,00. Hence surely you Will be getting Call letter by Indian Navy.

https://engineering.careers360.com/tags/indian-navy-btech-entry-scheme

The link provided Will guide you all about this entry.

Hope you understand this very Well and All the Best..