190911-N-UY393-0092 CORONADO, Calif. (September 11, 2019) Sailors from Amphibious Construction Battalion (ACB) 1 use a winch to lift an anchor onto a utility boat tow tug during Offshore Petroleum Discharge System (OPDS) operations for the Arctic Expeditionary Capabilities Exercise (AECE) 2019, Sept. 11. To demonstrate the OPDS capability, which contributes to the Navy’s Defense Support to Civil Authorities mission, SS Petersburg will be transferring salt water for the duration of the exercise. Approximately 3,000 U.S. Navy and Marine Corps personnel participate in AECE 2019, a joint training exercise that tests expeditionary logistical capabilities in the Arctic and southern California regions and prepares joint forces to respond to crises across the Indo-Pacific (U.S. Navy photo by Mass Communication Specialist 2nd Class William Berksteiner/Released)