ee ee oon wr eA, - adh aie kahatiaiar’ BBA hours, 25 July, outside our quarters in Rabaul, was established to be Meee 0.06 to 0.07 mr/hr beta and gamma, This figure was confirmed at the Rabaul Public Health Authority Medical Clinic on 26 July. ‘ Both the TAKUYO MARU and the SATUMA MARU were boarded the morning of 26 July for the purpose of making a detailed survey of radiation dose-rates on the ships. "1 1 The entire exposed superstructure, including the decks, bulkheads, and exposed equipment such as winches, canvas, covers, rope, and awnings, were monitored using an MX-5 instrument. Readings were essentially background on both ships, interior spaces were monitored. Similarly, the This included officers and crews quar- ters, mess, baths and heads; the galleys, the wheelhouses, the chert rooms, the laboratories, ad such spaces as paint, chain and stowage lockers. The readings in these interior spaces on both ships were lower than background. While many of the crew members followed Captain Goeke because of curiosity, Chief Mate Oyama of the TAKUYO MARU and Captain Tanaka of the SATUMA MARU watched the taking of all measurements on their respective ships. One crew member of the SATUMA took still pic- tures of the monitoring procedures. It is interesting to note that on the SATUMA MARU, two brass-colored metal parts of a gun, a fuse setting crank and a gunsight showed radio- activity. The readings were 10 mr/hr beta-gamma and 1.2 mr/hr gamma only. The guns were covered during the entire voyage and the rest of the gun and the canvas cover were at background intensity. The Captain was quick to let us know that these parts were from metal of United States origin. Radiation readings taken aboard the ships follow: O Ereot BOEARCH; VES DEN