iil
159
The Air Operations Center performed let~—down of all aircraft to VFR con=ditions on all recoveries because of a loss of precision radar by Ground
Controlled Approach,
UHKBHELLA.
The second underwater shot of the HARDTACK series was
UMBRELLA, detonated at a 150-foot depth on the lagoon side of HENRY Ise
land, Eniwetok Atoll, at 1115 hours on 9 June 1958.
duce a
fi
—e
—n og
Predicted to pro=-
jeld, UMBRELLA wasER
No postponements
ee
of tnis event occurred,
y
Twenty aircraft were originally scheduled, but 21 participated,
No
effects aircraft were engaged in tnis test,22 but four samplers took part .33
night suoport aircraft participated in post-shot project recovery opera-
tions in and around the test array.
One SA-16 (ST*BLE ECHO aborted because
of an oil leak in the left engine; another SA-16 replaced the aborted aircraft.
Both the Air Cperations Center and communications facilities per
formed satisfactorily.
mAPLE.
near FOX Isl
On lL June 1958 at 0530 nours, MAPLE was detonated on a barge
» Bikini Atoll after two postponement s. ie weapon, a
al
had a predicted yield o/
Ten aircraft were scheduled, and 11 participated.
One air abort oc-
curred; a B-57 sampler aborted because of a flame~out, being replaced by
a spare sircra.t.
One effects aircraft?4 took part, as did eight samplers.?°
Comuunications were excellent, and air control was satisfactory.
The