The Fukuryu Maru Noe 5 is a vessel of unknown age. It was captured by the Indonesians in World War II, which implies at least 13 years of sea voyagese The Fukuryu Maru is 9909 tonse It follows somewhat the general plans for tunny boats built at the Yaizu shipyarc:. differing from the usual vessel in being about 50 tonselighter. The vessel was monitored on at least three different occassions. The Tokyo University group headed by Drs Nakaidzumi and Kakehi generously gave ABCC their figures for March 17 and 20 (see Appendix). An American team from the United States Air Force visited the ship on 20 March and took a few readings given below. “Ae Average overall level of radiation from boat is about 20 mr per hour. Radiation is gamma. Be Crew quarters 35 mr C. Open deck 8 mr De. Covered passageways 12 mr Value of 50 R as minimom accumlated dosage for crew members still appears reasonable.” US DOE ARCHIVES le3