The Indian Navy will receive four more anti-submarine warfare aircraft from the United States starting May, local media reported Wednesday.

The country already has eight P-8I long-range maritime reconnaissance anti-submarine warfare aircraft, which were procured in 2009.

“These aircraft will also be in the same configuration as the earlier eight aircraft. Plans are on to install encrypted communication systems on the earlier ones,” Indian daily The Hindu quoted sources as saying.

The procurement process will be completed by 2022 at a cost of $1 billion.

The arrangement is part of the bilateral Communications Compatibility and Security Agreement (COMCASA) signed

Read more: US to supply India 4 anti-submarine aircraft from May