BAE Systems flight tests SABER technology for EC-37B Compass Call upgrade 6 April 2021 (Last Updated April 6th, 2021 12:03) BAE Systems has tested its Small Adaptive Bank of Electronic Resources (SABER) technology on a total of 11 flights of an EC-130H Compass Call aircraft. Teams from BAE Systems and the USAF conducted tests of SABER technology on 11 flights of an EC-130H from Davis Monthan AFB in Arizona. Credit: BAE Systems. Share Article BAE Systems has tested its Small Adaptive Bank of Electronic Resources (SABER) technology on a total of 11 flights of an EC-130H Compass Call aircraft. The flight tests were carried out along with teams from the US Air Force (USAF) Davis Monthan Air Force Base in Arizona.