Airman 1st Class Pedro Gerena, 71st Aircraft Maintenance Unit crew chief, checks a ram lock on an aircraft jack during preparation of an HC-130J Combat King II for a situational awareness communication upgrade (SACU) modification Sept. 25, 2019, at Moody Air Force Base, Ga. This SACU will enhance the aircraft’s ability to communicate with personnel on the ground during search and rescue operations. (U.S. Air Force photo by Senior Airman Erick Requadt)