55th Electronic Combat Group The 55th Electronic Combat Group , Davis - Monthan Air Force Base , provides combat - ready EC - 130H Compass Call aircraft , crews , maintenance and operational support to combatant commanders . The group is a geographically separated unit ( GSU ) that falls under the command of the 55th Wing at Offutt AFB , NE . The group also plans and executes information operations , including information warfare and electronic attack , in support of theater campaign plans . Members of the 55 ECG conduct EC - 130H aircrew initial qualification and difference training for 20 aircrew specialties and support operational and force development testing and evaluation for new aircraft systems . 41st and 43d Electronic Combat Squadrons . The 41st Electronic Combat Squadron was activated at Davis - Monthan Air Force Base in July 1980 and the 43d Electronic Combat Squadron was activated at D - M 1 April 1992 . Accomplishing the Compass Call mission , both squadrons provide vital capabilities in the realm of electronic warfare for the Air Force and are poised for immediate deployment to specific theater contingencies . The unit ’ s combat mission is to support tactical air , ground and naval operations by confusing the enemy ’ s defenses and disrupting its command and control capabilities . However , they each have a different area of responsibility . Both squadrons operate the EC - 130H aircraft , a specially configured version of the Air Force ’ s proven C - 130 transport . To execute its unique missions , the aircraft were modified with electronic countermeasures systems , specialized jamming equipment , the capability to aerial refuel , as well as upgraded engines and avionics . Modifications made to the aircraft vary between the two squadrons , to help each squadron meet its specific mission - oriented needs . Since coming to D - M , the 41 & 43 ECS have played a vital role during several successful contingency and combat operations . These include Operations Southern Watch , Just Cause , Desert Shield , Desert Storm , Uphold Democracy , Deny Flight , Vigilant Warrior , Provide Comfort , Decisive Edge , Deliberate Force , Enduring Freedom and Iraqi Freedom . 42nd Electronic Combat Squadron . The 42nd Electronic Combat Squadron provides the 55th Electronic Combat Group with combat ready EC - 130H COMPASS CALL trained aircrews . Directs all EC - 130H aircrew initial academic and flying qualification , difference and requalification training for 20 different aircrew specialties with more than 200 aircrew students trained annually . Provides registrar support to students . Maintains quality control for all aspects of contracted aircrew training and manages courseware development for 17 Air Combat Command - verified syllabi . Provides the group with simulator support for both continuation and initial qualification training . 755th Aircraft Maintenance Squadron . The 755th Aircraft Maintenance Squadron provides war - fighting commanders with combat ready EC - 130H Compass Call aircraft to expeditiously execute information warfare and electronic attack operations . The 755 AMXS plans and executes all on - equipment maintenance actions for 14 EC - 130H and one TC - 130H aircraft , including launch and recovery , scheduled inspections , servicing and component replacement . They also conduct all maintenance training , aircrew debriefing and supply functions . 755th Operations Support Squadron . The 755th Operations Support Squadron supports 55th Electronic Combat Group combat missions and contingency taskings . The 755 OSS performs command and control warfare analysis , targeting , and intelligence support and directs operational support functions including weapons and tactics training for all U . S . Air Force EC - 130H Compass Call aircrews .