SULU SEA (Oct. 19, 2021) Sailors prepare to refuel a MH-60S Seahawk helicopter, attached to the �Blackjacks� of Helicopter Sea Combat (HSC) Squadron 21, on the flight deck aboard Independence-variant littoral combat ship USS Charleston (LCS 18), during routine flight operations. Charleston, part of Destroyer Squadron Seven, is on a rotational deployment in the U.S. 7th Fleet area of operation to enhance interoperability with partners and serve as a ready-response force in support of a free and open Indo-Pacific region. (U.S. Navy photo by Mass Communication Specialist 2nd Class Ryan M. Breeden)