200204-N-RP442-1191 PACIFIC OCEAN (Feb. 4, 2020) An MH-60S Sea Hawk helicopter, attached to the “Blackjacks” of Helicopter Sea Combat Squadron (HSC) 21, conducts a simulated vertical replenishment (VERTREP) on the flight deck of Wasp-class amphibious assault ship USS Essex (LHD 2). Essex is underway in the eastern Pacific Ocean conducting routine operations. (U.S. Navy photo by Mass Communication Specialist 3rd Class Jenna Dobson/Released)