RELEASING PULL CHOCKS Navy Boatswain's Mate 2nd Class John Parkowski removes pull chocks and chains from an SH-60B Seahawk helicopter on the flight deck of the USS Shoup while under way in the Pacific Ocean Nov. 6, 2007. SHARE: Download: Full Size (0.02 MB) Credit: VIRIN: 824312-J-MMD26-575.jpg Photo Gallery