4. ECHOShot
ECHO shot CE °° weapon prototype designation), scheduled for Eniwetok Atoll, was cancelled on 12 April when it was ascer-
tained that KOON data had eliminated the scientific requirement >
es This change had no great effect upon Task Group 7.4,
other than the natural lessening of requirements.
was rescheduled for 16 April.
On the same date UNION
However, a series of postponements fol-
lowed in which D-day was the 20th, 21st, 23rd, 24th and 25th.
UNION was
finally detonated on the 26th.
5.
UNION Spot
WW
UNION Shot \
a
was deto-
f
nated at 0610 hours on 26 April, nineteen days after KOON, on a barge
in Bikini Atoll.
radii of 6
The exact location was at an intersection of arcs with
feet
.
e
nh
DELETED
4
1The TARE-OBOE airstrip, approximately
we}
thirteen nautical miles from Ground Zero, was closed for two days after-—
wards while debris was removed from the runway.
There were only two aborts:
»
an IBDA B-50, with inoperative radar
and VHF; and an F-84 with a wing tank that would not feed.
A spare F-8%
was airborne and returned successfully with the required samples.
As
usual, there was minor damage to ELAINE ONE, the effects B-36, and no
damage to ELAINE TWO, the effects B47.
aFwUHC
SG