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4.5
4-37
TASK UNIT 5
4.5.1
Timingand Firing - Communications.
Objectives.
The objectives of the timing and firing program on Cferation
HARDTACK were as follows:
1. To provide a reliable system for arming and fir!
devices.
“e
2.
To supply experimenters with accurate wire, radio, and
voice timing signals on all dry runs and on all detonations.
3.
To furnish personnel as members of the arming and fir-
4,
To monitor by wire and by radio, vital information
5.
To determine the time of detonation with respect to
6.
To provide and operate Bhangmeters, where practicable,
ing
parties.
pertaining to the readiness of the test devices and
of crucial experiments.
world time as broadcast from WWVH,
Japan.
Honolulu,
or JJY,
for the preliminary determination of yield.
Procedure.
Seven timing and firing systems,
independent in operation,
were installed to provide maximum flexibility in scheduling dry
runs and detonations.
The Control Point on Enyu Island at
Bikini Atoll controlled three systems,
one of which was moved
to the ABMA Firing Bunker on Johnston Island to control signals
for Operation Newsreel shots.
‘Three additional systems were em-
ployed for the shots detonated at Eniwetok Atoll,
exercised from the Control Point on Parry Island.
with control
Another
system was located on board the USS Boxer for the high-altitude
balloon shot.
Each system,
installations,
stations.
except for the Boxer and the Johnston Island
included one or more timing signal distribution
D6}
In addition to the Control Points, a total of eleven
Ji.
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