.
Restricted wate and air traffie nest of the anchorages was declared
subject to clearance by the Redsefe CRITSR. All units were direeted te
the RAM anchoreges ot 1300 in aesordanse with pree
conmenga-tawensry.te
views:
.
.
apr 2 mm~rs
”
:
Ite
.
:
A® 1200M CTG 7.3 sdvised all, ships to exesute re-entry at A-hour and
to resid on cne~half hour readiness wrtil further notise.
'‘
Daving the aoming eloud tresking airesaft made low intensity contacts
of contagination soving to the southwest, and high intensity (2 r/hr) contacta at the morta und of the reeetrask holdiag ‘pattern. This latter evidence boosss the basie for an alert asseage te the Iniwetels garrison indieating @ westerly soveaunt of contamination in the reentgen range located
approximately 60 Mf west-northwest of GZ. Althougls the contaninstion
was caleulated to pass to the north of Eniwetek, all personnel at thes
atoll were dirested to remain on alert status until H plus 24 hours. No
significant fall-out was subsequently experienesd, a fact verified by «
1900 repert from the Enixetok senitoring ayetem indicating 2 «/hr mximam on FRED and [LICR and sere a UNSULA.
west. of GZ were not considered
The low intensity contacts scuth-
Considerable usa was made of data from the drone Liberty snipe (YsG's
39 and 40) to evaluate the fall-out pattern. At
these
maintaining sufficient speed for ste
the
ships were at 26 NM on bearing 263° True from GZ and on course 350° True,
H plus 155 minutes
H plus 156 sinutes
H plus 160 atautee
3.0 rfhr
4.0 rfhr
b.2 v/he
H plus 168 ainutes
10.0 r
H plus 197 adinutes
35.0 r
H plus 190 alnutese
H plus 225 minutes
28.0 r/he
46.0 r/hr
At 1300K YaG 40 was bearing 303° True from GZ at 40 NM.
(This data above
waa originally reported a factor of 10 high, however, suspicions as to inproper functioning of instrumentation, later confirmed, gave results as
indicated above. These results, and later coordinatioa with Project 2.56
sea fall-out collectors were extremely valunble in aseessing the forecast
significant fall-out pattern as an elliptical area oriented generally north
and south to at loast 90 Ni{ froa GZ.
'
A& approxiastely 1600M the USS EPPERSON, ODE, on security patrol 40
NY northwest of Bikini, reported fall-out giving average readings of 25 ar/
RP and moxiaune of 100, retiring from the aroa at 1900M due to the high
tensities.
Cloud tracking flights on shot day were routine and in accordance with
plan.
(Seo inelosure attached roferonce air Radsafe Opurations for RO:@D.)
Bxcellont carly verification of the forecast fall-out pattern was obtained
as these efforts continued through the afternoon and tho night of shet and
shot plus one day. ‘filson flights subsequent to H plus 24 hours were cansel-
led since it soon became spparent that further efforts woro unnecessary.
Lab