U.S. Navy Chief Warrant Officer 3 John Sullivan, left, and Petty Officer 1st Class Chris Precht, right, assigned to Mobile Diving and Salvage Unit (MDSU) 2 Company 2-4, prepare to enter the water during a ship's husbandry dive to reinstall a screw propeller on Coastal Patrol Warship Firebolt at Kalifa Salman Shipyard in Mina Salman, Bahrain, March 7, 2011. MDSU-2 was deployed with Commander, Task Group 56.1 supporting maritime security operations and theater security cooperation efforts in the U.S. 5th Fleet area of responsibility.