i:
A problem as yet unsolved is the determination of the
location of the ships during the survey.
A list is being
made of markers of all types which are expected to survive
the shots.
These, however, will not cover all of the area,
especially the traverses out to sea.
Inquiry will be made
of the possibility of determining location by radar , per~
haps with the air search radar on Eniwetok if its range is
sufficient for a surface vessel.
VIII.
OPERATIONAL PLANNING
A.
General
Upon completion of Operation Tumbler~Snapper in
Nevada full attention has been focused on the forthcoming
overseas tests, Operations Ivy and Castle.
An operational
concept for Ivy has been formulated by the scientific task
group and disseminated for further operational planning by
other participating agencies.
Some planning for Operation
Castle, tentatively scheduled for September-October 1953,
has been accomplished.
This has been of a limited nature
due to the immediacy of Operation Ivy.
B.
Operational Concept - Ivy (4)
No changes have occurred in the basic planning as
to number of shots, dates, type of shots,,and expected yielis,
Two shots will be conducted at Eniwetok Atoll in the Fall
(4)
Concept of TG 132.1 Forward Area Operations, J - 11689,
_—
dated 19 May 1952 (since revised),
.