[1] Both designs are equipped with electronic warfare armament of the newer generation created on the basis of the latest science and technology.

As the further development of ideas already implemented in Kilo-class submarines, Amur-class boats are single-hulled, with minimal displacement, allowing for reduced noise signature and improved propulsion quality.

A totally new main electric engine using permanent magnets is in development/construction and projected to give high energy conversion efficiency even at low cruise speeds.

The design reportedly involved a submarine with lithium based battery technologies that might provide it with endurance of 17 days.

[4] However, it was also reported in January that India may choose the Kalvari-class instead, due to concerns about the slow pace of the Amur-class project which will be ready no earlier than 2030.