New system developed for drilling and production safety in deeper waters. The next generation of Kongsberg Maritime's Emergency Acoustic BOP (BlowOut Preventer) Control System, the ACS500 uses the new proprietary Kongsberg Maritime 'Cymbal' signal processing protocol for optimal data communication at long distances and has a depth rating of 4000m. It is a robust, reliable and user-friendly system designed for use in emergency drilling or production situations, when the primary BOP control system has failed.