CHAPTER4
CONTROL GROUP
4.1.
FUNCTIONS
The Control Group was organized to provide for the radiological safety of all personnel
entering the contaminated area. This group was established at several centers to act as operations station for all radiological-safety activities. Radiological situation data were gathered
at this station, and information required by monitors was maintained in the form of memoranda
or situation maps. These situation maps depicted the radiological! conditions on all islands and
lagoon areas, The maps delineated the areas cleared by the radiological-safety organization,
as well as those areas requiring monitor escort,
Contro! stations maintained operations tables giving details on all missions into contaminated areas scheduled for each day, including names of monitors, destination, genera! type of
mission, time of departure, time in contaminated area, and previous radiological exposure of
the party. These stations also constituted the clearance station for all working parties prior
to entry in the contaminated area.
The Control Officer accompanied the Commander of the Task Group on aninitial damage
and radiological survey to determine the reentry time for JTF-7 to return to the lagoon, as
well as the recovery date and the time for scientific projects. The Control Officer supervised
the conduct of ground and aerial surveys in order to evaluate the hazards that would be encountered by recovery parties working in the lagoon or on the islands. In several cases he
posted monitors on lightly contaminated islands to advise working parties of exposures that
could be expected at various places and to make sure that all workers had proper equipment.
He ensured that all working parties entering moderately or heavily contaminated areas were
accompanied by a trained monitor.
4.2
ORGANIZATION
The Control Group was reorganized with the changing concepts of operation. Initially, control stations were planned to operate at Parry, Eninman, and Enyu islands as soon as reentry
was accomplished. Destruction and contamination required the establishmentof stations at the
following locations:
1, Forward ready room, USS Bairoko.
2.
3,
4.
5.
Rad-Safe barge alongside the USNS Ainsworth.
J-1 office, USS Curtiss.
J-1 office, USS Estes.
Rad-Safe Building, Parry Island.
_
Decentralization of TG-7.1 operations was accomplished shortly after (@RAVOto acceler-
ate recovery and reinstallation activities. This decentralization resulted in the Bairoko becoming the center for helicopter entries and exits from contaminated areas, the Ainsworth the
23