succeeding days after each shot as required, The Instrumentation for each
was the same as that used at Eniwetok. Communications from heliceptor to
ground were provided by EG&G but proved to be unsatisfactory.

Eventually,

the data were sent back via the fiight-operations radio net when necessary.
Evacuation of the atoll before each shct required that the pre-entr7
survey originate from afloat.

Normally the helicopter selected for the mis-

sion departed from the USS Badoeng Strait and made its first stop at the
USS Curtiss to pick up the rad-safe personnel. The helicopter then stopped
on Enyu to pick up CTG 7.1, and the mission was carried out. Once the
{sland of Enyu was declared clear by CTG 7.1, personnel returned to the
{sland and all operations were conducted from ashore.
3.1.4— Monitors for recovery parties were provided as required.

As at

Eniwetok, the demand was quite small. Generally speaking, projects provided
their own monttors and required no monitoring assistance from TU-7.
3.1.5—The radiochemistry trailer, obtained from the Army Signal Corps,

was deck-loaded on the USNS Ainsworth.
ried out in this trailer.

All radiochemistry work was car-

The Laboratory Section handled approximately 400

water samples, which were taken from the water supplies of the various

ships and from the swimming beach on Enyu. No chemical analysis wus required; gross beta-gamma activity was determined.
3.2

Shots and Survey Results

Very l'ttle interference with preparations for firing the various devices
was caused by excessive contamination. In certain cases the spctting of the
shot barge was delayed for a day or so as radiation levels were excessive
in those areas in which the surveyors had to work. Generally speaking, however, no delay was encountered as a reeult of the contamination. Table 3.1

-

lista shots, sbot dates, and times for Bikini Atoll.

TABLE 3.1—FIRING SCHEDULE, BIKINI ATOLL
Device

Date (M.1I.)

Local Time

Cherokee

21 May 66

0550:38

Zuni

28 May 56

0556

Flathead

12 June 56

0626

Dakota

26 June 56

0606

Navajo

11

TEWA

July

66

0

21 July

56

0546

July

wy

556

- 30 -

ea ve woe
my
8 pad we

:

:

seat
eee.

so

‘y

‘
‘

naa

.

Select target paragraph3