PACIFIC OCEAN (March 6, 2021) Civil service mariner crew members onboard the Military Sealift Command dry cargo/ammunition ship USNS Richard E. Byrd (T-AKE 4) assist with helicopter operations during the Navy's first at-sea aircraft carrier helicopter transfer of an F135 engine power module load simulator, off the coast of San Diego. The module was transferred from the deck of Byrd to the aircraft carrier USS Carl Vinson (CVN 70) and back to Byrd via EurocopterAS332 Super Puma and a U.S. Marine Corps CH-53E Super Stallion helicopters. (U.S. Navy photo)