Aboard many of the U.S. Navy's P-3C Orion maritime surveillance aircraft, AN/USQ-78A and AN/USQ-78B Display Control Units (DCUs) operate as integral components of the aircraft's Single Advanced Signal Processor (SASP). The system is responsible for command and control of the signal processors, drives the displays and controls for two sensor stations, provides acoustic contacts to the Tactical Sub-system, and communicates with other acoustics subsystems.