hours, 25 July, outside our quarters in Rabaul, was established to be
0.06 to 0.07 mr/hr beta and gamma,
This figure was confirmed at the
‘tee cee ee
Rabaul Public Health Authority Medical Clinic on 26 July.
‘
Both the TAKUYO MARU and tha SATUMA MARU were boarded the morning
of 26 July for the purpose of making a detailed survey of radiation
dose-rates on the ships.
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ae
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, aid 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 gama 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:
ROE ARCHIVES