An air department flight deck supervisor signals to the waist catapults safety observer. An air department flight deck supervisor signals to the waist catapults safety observer as an EA-6B Prowler aircraft stages to launch from catapult number four aboard USS Harry S. Truman (CVN 75) on April 1, 2007. The Truman is underway in the Atlantic Ocean conducting training. SHARE: Download: Full Size (0.02 MB) Credit: VIRIN: 549529-H-SSE99-055.jpg Photo Gallery