She returned to the West Coast late in 1943 and departed San Pedro, Calif., on New Year's Eve after undergoing repairs and loading with oil and supplies.

Pecos departed Majuro Atoll 2 February 1944 to escort Washington into the anchorage after the latter's bow had been shorn off in collision with Indiana.

Less than two weeks after Kwajalein Atoll fell to the Americans, the tanker steamed into the lagoon and refueled warships in the Marshall Islands until returning to Pearl Harbor early in March for oil and supplies.

For ten hours on 10 July, shells from marine "Long-Tom" cannons flew over Pecos as she lay at anchor off Saipan, refueling cruisers, destroyers, and an LST full of high explosives.

A bomb exploded so close astern that the oil feed pump fuses blew temporarily stopping the main engine.

The veteran oiler next steamed to Mangarin Bay to supply aviation gasoline for an Army Air Force unit based there 18 February.

Pecos spent two hectic days outside of Hagushi Anchorage, adjoining the war-torn city of Naha, fueling destroyers on the perilous picket lines.

By 26 September she was anchored in Sasebo Ko, Kyushu Island, Japan, which had just been occupied by American naval forces, fueling the vessels in the harbor.

Commodore Larry Wade was CO from 13 March 1972, until 19 October 1972, during which time she traded in the Caribbean and made trips to the Arctic assigned to the 1st Naval District.