Airman Felix Carcamo, aviation machinist's mate, replaces the droop stop heating element on an SH-60F Seahawk, assigned to the "Black Knights" of Helicopter Anti-Submarine Squadron 4, on the flight deck of the aircraft carrier USS Ronald Reagan. The Seahawk is used for anti-submarine warfare, search and rescue, drug interdiction, anti-ship warfare, cargo lift and special operations. Ronald Reagan is currently deployed to the U.S. 5th Fleet area of operations.