South Korea deployed 4 Wildcat anti-submarine warfare (ASW) helicopters, intended to counter North Korea’s submarine capabilities, on Wednesday, the Republic of Korea (ROK) Navy announced.

The South Korean Navy received a total 8 Wildcat choppers (AW-159) in June and December 2016 from the British-Italian company AgustaWestland, now part of Leonardo.

The other half of the helicopters due to be deployed in July, once pilot training is complete.

“New AW-159 helicopters for maritime operations are mounted on battleships including convoy (FFG) and carry out anti-submarine warfare, anti-surface warfare (ASuW) and maritime reconnaissance missions,” the ROK Navy said in a written