"Ashtabula" began another WestPac deployment on 8 February 1975. She took part in Operation Seafox, a joint SEATO exercise with six other nations. Her next assignments were Operation Eagle Pull and Operation Frequent Wind, held off the coast of Vietnam. On 11 May, she was ordered to Cambodia to support the rescue of , an American merchant ship that had been captured by communist forces. In late July, the oiler returned to her home port, where she spent the next 10 months in upkeep and local operations.