190909-N-DY073-0298 CORONADO, Calif. (Sept. 9, 2019) An Amphibious Construction Battalion (ACB) 1 utility boat tow tug approaches the SS Petersburg (T-AOT-9101) during offshore petroleum discharge system operations for the Arctic Expeditionary Capabilities Exercise (AECE). 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 Brianna Jones/Released)