Keywords: US Navy 051013-N-9222M-013 A Close-In Weapon System (CIWS) fires during a Pre-Aim Calibration (PAC) fire aboard the amphibious assault ship USS Essex (LHD 2).jpg en Pacific Ocean Oct 13 2005 - A Close-In Weapon System CIWS fires during a Pre-Aim Calibration PAC fire aboard the amphibious assault ship USS Essex LHD 2 CIWS is the self-defense system that combines a 20mm Gatling gun with search and tracking radar to provide surface ships with terminal defense against anti-ship missiles Essex is currently underway in the Pacific Ocean conducting training exercises U S Navy photo by Photographer's Mate Airman Nicholas C Messina RELEASED 2005-10-13 051013-N-9222M-013 Navy http //www navy mil/view_image asp id 28884 U S Navy photo by Photographer's Mate Airman Nicholas C Messina PD-USGov-Military-Navy Aboard USS Essex LHD-2 Phalanx CIWS firing |