BAE Systems Tests SABER Technology For The New EC-37B Compass Call BAE Systems Tests SABER Technology For The New EC-37B Compass Call A rendering of the new EC-37B Compass Call that will replace the aging EC-130, which can be seen in the background. (Image: BAE Systems) SABER technology is part of a critical upgrade of the Compass Call system that will be rehosted on the EC-37B. BAE Systems successfully flight tested its Small Adaptive Bank of Electronic Resources (SABER) technology for the new EC-37B on a U.S. Air Force EC-130H from Davis Monthan Air Force Base, Arizona. The company and Air Force’s personnel worked together during the flight test campaign that produced a total of 11 flights and assessed the correct functioning of this critical upgrade for the Compass Call system.