CHAPTER III RADIOLOGICAL FINDINGS A. DESCRIPTION OF SHIPS Both vessels are of the cutter type operated by the Japanese Mari- time Safety Board and ontfitted with scientific equipment for cartographic survey work in connection with the International Geophysical Year, The complement on the TAKUYO was 50 officers and men and on the SATUMA, 62 men, according to lists given to Dr. Haszler (Australian Health Officer). However, all local newspaper stories quote the TAKUYO complement as 51, The TAKUYO is a one year old, diesel-driven vessel, nicely outfitted, and in a clean condition. The SATUMA is a 14 year old, diesel~driven ship, and, relatively speaking, not quite so ship-shape. Neither ship is fitted with a distillation unit for evaporating sea water for drinking purposes end both ships loaded shore water at Tokyo for the trip, Maxi- mum speed of both ships is 13 knots. Two spellings of the name SATUMA will be noted, "SATSUMA" is the old spelling; "SATUMA" is the new one, now in use. B. JAPANESE RADIATION INSTRUMENTATION The TAKUYO MARU was equipped with a laboratory-type geiger counter and a scintillation counter with a deep water proba, All were of Japanese manufacture, but were very similar in design to equipment manufactured in the United States, The geiger counter was equipped with a geiger tube with an end window of 1.42 mg/cm2 thickness for beta measurement, ment was an amplifier and scaler unit. Accessory equip~ Efficiency was said to be 9.6%, satsinaedDere s gak eo Papercut CORSAERUPTED, | BOE ARCHIVES