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Local weather was very poor, a condition which usually esconpanies
@ southerly flow. Aside fron sloud photography, the adverse woather
eonditiens €14 not seriously affect 10-18 experixents, Yo seamureble
fall owt was detected on Parry or Eniwetck Islands, Heavy rains
ahewere during shot day, plus the very Savorable wind situation,
resulted in lower than expected contemimation on the islands adja~-
cant te the shot site. Reavvery cperations provecded ahead of sche~
duie ané were completed, exceyt far the underwater pressure instru-
mentation by 34,
.
(3) Program Activities .
.
(a) Progran 1. Frior tothe first shot,
three oanplete blast lines had been constructed ~ tro at Bikini
end one at Eniwetok, These three biast lines were operated by the
Sendia Corporation for making air blast and relsted weasuranents
along the surface of the ground at varying distences frou the various
shots (Projeetes 1.2a, 1.8, 1-7). Of these three blast lires, only
the one located in the northwestern portion of Bikini 4toll cbtainsd
useful measuremnts, The blast line on the scuthern portion of
Bikind oporeted satisfactorily, bus the results wore of little
value due to tle low yield of Shot 3, The blast iins st Exntwotek
was not used because the shot for which it ind bean constructed
wae cancelled, One additional line was constructed tavard the end
of the operation te take advantage of Shot 6, which during the
operation was reasheduled from Bikini to the Hike crater at Rniwetok.
(b) Measurements of underwater pressures
wore sade under project 1.4 by a group representing tle Office of
Bevel Research, Naval Research Laboratory, Eaval Ordnance Laboratory end David Taylor Model Basin, ‘The operational difficulties
encountered by these groups were at times extremely severe, pri+
marily due to the searcity ef proper support ships, the continued
Celaya inthe shots and the rough conditions of Bikini Lagoon.
One ATF and Floating Dry Doak (ARSD) were required by the project
almest continuously, however, there were frequent eccasions when
the dewand for these two vessels far other tasks rade it necessary
te tasporarily suspend the work of project 1.4. It was necsseary,
Decause of the frequent postpenements of shot dates, to visit the
inatrumnt ctations daily and any iuterrupticn in the availability
of the suppers ships reduced the e hances of obtaining useful data
from the instrumentation, The Navy Task Group {T6 7.8) made every