On 30 November the squadron was moved further south to K-13 airfield due to North Korean and Chinese advances. It was again moved even further south after the UN forces lost additional ground to the North Koreans to K-10 airfield situated on the coast close to the town of Chinhae within the Pusan Perimeter. This was to be the squadron's permanent base for the duration of their first Korean deployment. During this period (while equipped with F-51D Mustangs) the squadron flew 10,373 sorties and lost 74 aircraft out of the total 95 allocated. Twelve pilots were killed in action, 30 missing and four wounded.