Canton Mar. 7, 1938-Jul. 25, 1938, Expeditions 12 depart, 13 return

Enderbury Jul. 26, 1938-Dec. 3, 1938, Expeditions 13 depart, 14 return

Jarvis Dec. 11, 1938-Jan. 10, 1939, Expeditions 14 depart, 14A return (Appendicitis in Jan. 1939; removed by Cruise 14A on Roger B. Taney ship)

Roger B.Taney, 12th expeditionRoger B.Taney, 13th expeditionRoger B.Taney, 14th expedition