SUBJECT:
qs
Radiolowca
‘Survoy f Downwi ¢
°-ols Corntaninated by BRAVO
3 March
LOY. - 1800 Twe partics 4. smil boats surveyed living arca
oO Eongelap Tslorc arc cistorn half of Rongelap Atoll
9 March
O79 - 1130 Two partics in smll boats prococdod from the I
which wis statiorcd cutside Utirik Atoll and surveycc
-tirtk and Aun Telends, vho main islands of the Atoll
9 March
- oO - 1700)
Onc party tr a smill ooat landod on tho outer
reef of Bikar Isirnd and survcyod tho island, the a.
arg: islinc
of ‘dear “tol,
10 March - 7 C ~ 100
Twe partics fn smill boats proceeded from the I
10 March - 140 -
Two parti: in sm ll boats proceeded fromthe Co
which was statiorcd outside Rengorik Atoll and surve:
cniwetak [sland ‘woore the Task Forcots Units had bec
stattoncd ) ard t+
other important islands of the Ato.
900
which was station « outside Alinginac Atoll and surve
‘ho dnhebitc '¢ ordsoof th atoll
Ji March - (700 -
WOO Onc party 4. small boat survoyed tho northwes
mn islands of Rongclap Atoll and one party rocheckoa
“he living arcas on Rongolap Island and cstablished a
sofercnc:
12 March - 9800
Leeattion for futurc docay measuromnts.
jurvoy tear ores‘ ro! Spdwot-:k Atoll via DDE.
4. The following porsonnul from
members of the mrvey tan:
Horbort Scovill., Jr,
Richard Rast
Richard Sew.
¥almer (troy:
cr, § cts tn TC 7.2, TU 13, served as
Tom? Starr
Peo dint 2°
Poagat ha
ees hs
The USS NICHOLAS (DDR 449) suppliw
Frink, Executive Cffiecr
of
«
for sury ys
*
¢ se un
or th: dir-ctien of LT Cliffs
5. Instrumntatton
conduct
Radiae sct AN/PDR-39 was scolert >! as the instrumant to be used in the
of the survey.
Five (5) sacn
of AN/PDR-39 wore calibrated with an 80
Curic Co™
source twunty-four hours b fo° ‘oparturc, The calibration yieldod
zcro variation botwaon instrumuits - acy scale.
Jpcn cross chocking threc cf
these instruments, ( polrt cf actual vars y dna radiation ficld of 0.320 r/
it was found that all tnro- instruct
ro
gum roading.
These survey oot rs werd
tions of dampness {t.
and continual roigt varncling,
efficzontly fer +
subi ct *
the poednt of g .
Wit
urctoow fF tt
4
rrolong-d use under adverse condi-
wt r splashing over thom), salt dcpcsit
a
rg
tien, all instruments operated
i.
one
Ontos final day it was found
”S