191218-N-TW634-0084 PACIFIC OCEAN (Dec. 18, 2019) Sailors fires a .50-caliber machine gun aboard the submarine tender USS Frank Cable (AS 40) as the ship conducts sea trials. Frank Cable, forward deployed to the island of Guam, repairs, rearms, and re-provisions submarines and surface vessels in the Indo-Pacific region. (U.S. Navy photo by Mass Communication Specialist 1st Class Derek Harkins/Released)