She was commissioned 22 July 1972 as USS Mount Baker (AE-34) and entered service with the Atlantic Fleet.

In 1976, the Chief of Naval Operations authorized the testing of the LAMPS MK III System aboard her flight deck.

Later that year, Mount Baker gave support to rescue operations of the Navy's nuclear-powered submersible (NR-1).

Previously, she provided ammunition onload and offload support to U.S. Navy ships operating in the Atlantic and Indian Oceans and the Mediterranean.

[2] She was laid up at the Naval Inactive Ship Maintenance Facility in Philadelphia, PA, waiting to be sunk as a target, but she was apparently sold for scrapping c. June 2012 and towed to Brownsville, Texas, for dismantling, circa 7 July 2012.