The Rapid Prototype Torpedo Warning System (TWS) is lowered into the water aboard the aircraft carrier USS George H.W. Bush (CVN 77). George H.W. Bush and the U.S. Naval Sea Systems Command PMS 415's Surface Ship Torpedo Defense (SSTD) team conducted at-sea testing and data collection of TWS and Countermeasure Anti-Torpedo (CAT) system. This is the first time the TWS/CAT system has been used aboard an aircraft carrier. (U.S. Navy photo by Mass Communication Specialist 2nd Class Tony D. Curtis/Released)