In the first half of 1977, the R/V Thomas Washington of the Scripps Institution of Oceanography continued work on INDOPAC Expedition, starting from Guam, Marianas, and ending in San Diego. Geophysical and geological programs were carried out in the marginal seas of southeast Asia; biological and physical oceanographic programs were carried out near Guam, and in the central and eastern Pacific. This report includes a brief summary of the work on each cruise leg, a chronology, cruise tracks, and lists of stations, samples, and observations. Work on leg 13 was in cooperation with the K/M Samudera of the Indonesian Institute of Sciences.