"Wompatuck" apparently was laid up at Cavite for more than three years, awaiting disposal. However, she was withdrawn from the sale list on 9 July 1941 and selected for conversion into a self-propelled, diesel oil barge. She was reclassified as a "fuel oil barge" (YO) and renamed "YO-64" on 9 October 1941, but her conversion apparently was incomplete when the Philippines fell to the Japanese in the early months of World War II in the Pacific. While no records have been found delineating her fate after war broke out in East Asia, it can be assumed that she was either captured by the Japanese when they took Cavite on 2 January 1942 or was scuttled by American or Filipino forces to prevent her capture. "YO-64" was struck from the Navy list on 21 April 1944.