A MH-60S Sea Hawk helicopter, assigned to Helicopter Sea Combat Squadron (HSC) 23, retrieves a palette of supplies from the flight deck of amphibious transport dock ship USS San Diego (LPD 22) during a vertical replenishment at sea San Diego is conducting Certification Exercise (CERTEX) with the 11th Marine Expeditionary Unit in preparation for their upcoming deployment. (U.S. Navy photo by Mass Communication Specialist 2nd Class Stacy M. Atkins Ricks/Released)