CALIBER QUALIFICATIONS U.S. Navy Seaman LaJoel T. Rouse, left, waits his turn to qualify on a .50 caliber machine gun as U.S. Navy 1st Class Kevin B. Miller loads rounds into the weapon aboard the guided-missile cruiser USS Vella Gulf in the Atlantic Ocean, March 9, 2009. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 595309-E-RGS45-633.jpg Photo Gallery