On 10 September, MGCIS-1 personnel boarded the USS George Clymer (APA-27) departed Kobe. While enroute they established a secondary Tactical Air Control Center on board in case any of the primary control ships were knocked out during the upcoming assault. Following the Inchon landings on 15 September, the squadron came ashore on 17 September and established radars and a control center at Kimpo Air Base. They were partially operating by 20 September. While at Kimpo, MGCIS-1 controlled combat air patrol aircraft in the airspace and cleared cargo aircraft into the field. The squadron secured operations on 10 October and returned to the port at Inchon to prepare for follow on tasking. Personnel and gear were loaded onto the USS Alshain and the USNS Marine Phoenix (T-AP-195) and departed the harbor on 17 September.