In May 2013, it was announced that the Defense Acquisition Program Administration (DAPA) was commencing a 1 trillion won ($900 million) procurement program to acquire up to 20 new anti-submarine warfare aircraft to replace the existing fleet of 16 P-3Cs. While possible candidates include the C-295 MPA, P-8 Poseidon and the SC-130J Sea Hercules, DAPA was considering a plan to procure 12 to 20 ex-USN S-3 Vikings for the ROKN. In 2017, the ROK Navy canceled plans to purchase refurbished and upgraded S-3 Viking aircraft. In March 2019, the South Korean government ordered six P-8A aircraft from Boeing.