In a particularly critical delivery the ship was diverted from a planned shipment to Hawaii and departed San Francisco on 19 December 1941 along with a tanker and two freighters with arrival in Brisbane, Australia on 12 January 1942. There she delivered 55 P-40E and 4 C-53 aircraft including 55 pilots, 20 million .30 caliber, 447,000 .50 caliber, 30,000 three-inch AA and 5,000 75 mm rounds of ammunition along with five carloads of torpedoes, over 615,000 pounds of rations and 178 officers and men in addition to the pilots. From Brisbane Polk, making a stop at Townsville, sailed to Soerabaja arriving on 30 January with ammunition, bombs, airplanes, and rations for forces in Java. Of eight vessels planned for relief of Java, and indirectly the Philippines, only Polk and the chartered Dutch vessel Bloemfontein, one of the Pensacola convoy vessels, arrived before that island fell on 9 March.
