Best Submarine movies on prime

Actors : Rana Daggubati, Atul Kulkarni, Kay Kay Menon, Om Puri,
Directors : Sankalp Reddy,

A Pakistani submarine, Ghazi plans to secretly attack Vizag port. For doing so, it has to get past Indian submarine S21.

Actors : Nikhil Siddharth, Abhinav Gomatam, Aryan Rajesh, Iswarya Menon,
Directors : Garry Bh,

After receiving the news of the death of his elder brother Subash, who worked for R&AW, Jay sets out on a mission to find out what happened leading him into a bigger conspiracy of a possible nuclear attack threat to the country.