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a &- would be a requirement to have aircraft and sur
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face transportation in sufficient quantity for sampling and for emergency evacuation at both atolls simultaneously,
As early as 3 December 1956, the Air Force Special Weapons Center
had anticipated the possibility of providing and maintaining a dual shot
capability during HARDTACK, as well as "the possibility of simltaneous
testing in both the Pacific /Eniwetok/ Proving Ground and Nevada Test
Site." 6 Center had learned from Joint Task Force ‘SVEN that
The current concept being envisaged for Operation
HARDTACK contemplates the probable firing of two shots
on the sams day on some occasions, and perhaps in a few
instances, at the same time. However, while some additional aircraft will be required, it is realized that
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a complete dual sampling capability probably cannot be
supported, nor is it justified, Therefore, in order to
have an adequate number of sampling aircraft available
on dual shot days, attempts will be made to have one of
the scheduled shots a low yield detonaticn reauiring relatively limited participation so far as sampling air
craft is concerned,
At the Jcint Task Force SEVEN conference, Dr. Gaelen Felt of the
Los Alamos Scientific Laboratory outlined broadly the scope of the HARDTACK technical phases, which included, besides the proposed number of
shots, the readiness dates and predicted yields, stressing especially
the two-atoll (or dual shot) concept of firing,
The overall HARDTACK
operation was to follow generally the REDWING concept; the two-atoll
firing concept had been used successfully during DYING on two different
occasions, when on 28 iny 1956 ZUNI was detonated in tie Bikini Atoll
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