ADU-891

Definition

The ADU-891 Adapter Group Test Set provides the physical and electrical interface between the Common Munitions Built-in-Test (BIT)/Reprogramming Equipment (CMBRE) and the missile. What CMBRE and ADU-891 do together: The CMBRE system (Common Munitions Built-in-Test/Reprogramming Equipment) is portable support gear used by the U.S. Air Force, Navy, and allied forces to prep missiles and other guided munitions before flight or during maintenance. It: performs pre-flight and periodic built-in tests on munitions, uploads mission or flight software, updates cryptographic data, and can erase classified data from munitions memory when needed. The ADU-891 Adapter Unit itself doesn’t do the tests. It bridges the CMBRE system to the specific weapon’s electronics — different versions of ADU-891 exist for supporting different munitions types.