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HEADQUARTERS TASK UNIT 13
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Task Group 7.1
APO 187 (HOW P.O. Box 8
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1.
“BUSEY
segam
Pe" MATERIAL REMOVED
12 March 1954
Radiological Survoy of Downwiid stalls Contaminatod by BRAVO
Acknowlodgcment
Tho members of tho survey toam wish to express thoir approciation to +
Captain, officers and members of tho crow of the USS NICHOLAS (DHE LL9) for th
assistance and cooperation in conducting tho survoy horein roportod,
Captain
. turned over all possiblo facilitics of his ship in arder to assist in tt
survey. LT
the Executive Offlecr, organised all tho opcrations of tho
boat partios, and it was only through his personal dircection and participation
that it was possiblo to carry out the small boat survoys undor oxtromly diffir
conditions, Sinco most of tho lagoon mtcrs woro not navigablo by a DDE, it w
wy nocossary to makc long boat trips in high scas and land on tricky coral roofs,
That it was possiblo to mako, without oishap, a detailed surwy of five widely
“aug scparatod atolls in the courso of thro days with only two boats was largoly ch
(a
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33
g Fare
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to his efforts,
2.
Introduction
Tho BRAVO Shot contaminated a aumbor of atolls in gomrally castward
diroction from Bikini to such an axtcnt that it bocame necossary ta ovacuato ti
nativo populations from Rongelap, -\linginao and Utirik Atolls and tho military
perssnnel on Rongorik Atoll. Following this cvacuation CJTF SEVEN organisod t!
subjoct dotatlcd radfological survey of tho atolls to tho oastward of Bikini
(Ref. CJTF SEVEN Enimotok 060400Z),
the following purposes:
‘h> data from this survoy wero requirod f.
a,
“he «evaluation of tho
radiation offcets on cvacuoos,
b,
“he csetimation nf the
clapsed timbefore rooccupancyes
c.
Tha costimation of tho rasitual radiation effects of large yiclds
surface dotcations,
In connoction with this survey, tcams from various Task Groups and Mr.
Wilds, Trust Torritory Ropresentativc, rcoturned to tho atolls to sccure tho
evacuated habitations, servico oilitary cquipment, and obtain documcntary phot-
graphy.
3.
Operational Schedule
ae
8 March - 0600
AM/ug
Survoy toam rondozvous aboard USS NICHOLAS (DDB 449)
in Rengelap Lagoon.