The TG 7.1 voice count-down receiver was used to drive TG 7.2 and TG 7.5
public address systems on Eniwetok and Parry Islands at Eniwetok Atoll.
JTF 7 wedlized approximately 400 frequencies in the PPG. TG 7.1 was
assigned about 160 frequencies of this total. The greatest users of frequencies were Program 5 (Effects Aircraft) and Program 2 (Fallout). The 215
to 260 Mc telemetering band was particularly crowded, requiring maximum
coordination to meet requirements of users. After arrival in the PPG, it
became necessary for CJTF 7 to reallocate certain of the lower frequencies
because of harmonic interference.
The complexities of JTF 7 communications require an abnormal amount
of coordination, Experience has proved that this coordination can best be
accomplished by personal conferences, and as a result many trips are re-
quired to be made by the TG 7.1 Communications Officer,
3.14
SECURITY
As during Castle, only certain aspects of the security function were a,
responsibility of TG 7.1, The security liaison function was delegated to the. —
Classification Officer, and the implementation of personnel-security policies
was delegated to J-1.
below,
3.14.1
Problems concerned with these aspects are discussed
Predeparture Security Indoctrination
¢
After receiving the comments of TG 7.1, CTG 7.5 on February 1, 1956,
issued the "Security Indoctrination Letter for Task Group 7.1 and 7.5." Sub-
sequent to that date, each member of TG 7.1 was required to have onfile
with the headquarters a completed Security Indoctrination Certificate prior
to being authorized travel to the PPG.
the Task Group number 2366.
3.14.2
Completed certificates on file with
Transmission of Classified Documents in the Personal Custody of
Individuals
After securing the concurrence of CTG 7.5, TG 7.1 implementing pro-~
cedures concerning this subject were published on July 7, 1955.
Generally,
they followed the procedures observed during Castle, in that hand-carrying
of classified documents between the PPG and other locations was discouraged,
but was permissable if operational necessity so required and if certain secu-
rity measures were observed.
On November 25, 1955, Amendment No. 1
- 111 -
AFWLHC
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