Supervise installation and maintenance of paging and intercommunications systems on ell islands other than Eniwetok Island.
Provide a Comcenter facility at Parry Island to receive all incom-
ing teletype messages (except TOP SECRET AND RESTRICTED DATA) for
TG 7.5 and TG 7.1.
Supervise the publishing and distribution of the Atoll Telephone
Directory.
Supervise the operation of motion picture facilities at Bikini and
Eniwetok Atolls (except Eniwetok Island).
Provide teletypewriter operators to support CTG 7.1 Eniwetok-Bikini
RATT circuit.
Promulgate message preparation, precedence, classification, security, and transmission information to message originators within TG
7.5.
Furnish advice and assistance to Task Group 7.5 personnel on conmmunications metters.
Transmission Security a.
Classification - Classification of information which may be trans-
mitted over various type communications circuits is as follows:
(1)
Telephone and landline systems, Eniwetok and Bikini Atolls -
(2)
Voice radio nets - Unclassified information.
(3)
SECRET and below except no circuit using radio transmission in
any portion is approved for the transmission of classified matter in plain language. Users will be warned by the telephone
operator in each case.
The only crypto-systems approved for the encipherment of AEC
RESTRICTED DATA messages are Class A systems, the terminals of
which are held by "Q" cleared personnel.
4)
Only unclassified messages may be sent, in the clear, over TwX
or Western Union circuits. Classified messages must first be
encrypted if it is necessary to transmit them over such faciiities.
5)
Messages classified TOP SECRET (RESTRICTED DATA) may be trans-
mitted, using special SIGTOT systems, to Los Alamos and AEC
Washington, provided prior approval is obtained from Deputy Con-
mender TG 7.5 or Asst. C/S, J-2, TG 7.5.
Circuit Monitoring - The CJTF SEVEN Security Monitor Unit will monitor communications circuits to detect the use of improper procedure
and viclations of security.
,