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Thus, on the morning of D -1 ~- the last day before the
shot -- all of the experimental equipment is supposedly ready
except for the final loading of cameras, the final setting of
the switches, etc.
ready for firing,
checkouts,
The device has been checked out and is
All personnel except those needed for final
and their support,
such as boat operators,
heli-
copter crews, etc., are evacuated, and the big question is:
“What will the weather be like?"
At about 8:00 a.m, on D -1, Colonel Bonnet, the Task
Force Weather Officer, will bring to Admiral Hanlon an estimate
of the weather situation based on data taken at 6:90 a.m. and
before,
If the situation is clearly desirable, he will “turn
the shot on"; that is, declare that we will attempt to fire
the next day,
If it is clearly undesirable, he will call the shot off;
and if it is marginal, he will possibly wait until the mid~
morning formal briefing, at which more data are available, to
decide,
Obviously, this process,
can go for some time.
shot.
if the weather is unfavorable,
During CASTLE, we waited 28 days for one
However, good weather usually comes around about once
every week or 10 days,
Of course, while weather may cancel the
high-yield shot, we may be able to fire a low-yleld device at
Eniwetok,
When a favorable prediction is made, the shot will be
"turned on" at about 8:00 a.m,
Everyone concerned will be noti-
fied and the final film loading and switch checking will begin,
At about 10:30 a.m. a complete briefing will be held at which
the weather and fall-out patterns will again be discussed,
All known ships and air-borne aircraft will have already
been advised as to the courses they should take, and a search
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Appendix “B”