QUALIFICATIONS TEST U.S. Navy Petty Officer 2nd Class William Clark, a hull maintenance technician, performs a qualification test in the machine shop of the aircraft carrier USS Nimitz, which is operating in the Pacific and Indian oceans, Feb. 25, 2008. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 363584-W-YBF22-919.jpg Photo Gallery