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AN/SQR-17 is a passive submarine detection system developed by Diagnostic/Retrieval Systems, Inc (now Leonardo DRS) for the US Navy and is still used today. It is a four channel low frequency spectrum analyzer that processes analog sonobuoy audio via a receiver linked to a Light Airborne Multi-Purpose System (LAMPS) helicopter. It at one time was deployed on more ships than any other passive sonar system. [1]
In accordance with the Joint Electronics Type Designation System (JETDS), the "AN/SQR-17" designation represents the 17th design of an Army-Navy electronic device for surface ship passive sonar receiving system. The JETDS system also now is used to name all Department of Defense electronic systems.
