The South Korean military has decided that it requires two more Boeing 737 AEW&C platforms, boosting the number of aircraft to six.
By 대한민국 국군 Republic of Korea Armed Forces (2011년2월 공군 E737 조기경보기 제주도 한라산 상공 비행(1)) [CC BY-SA 2.0], via Wikimedia Commons
An anonymous government source told Korea Times that the purchase is included in the long-term acquisition plan.