--- --— — The De~ty Commnicetion8 Officer frequently visited the foruard aree for the purposes of necesstmy liaison between the communicationsdetachment, I%ornicEnergy commission and engineers, and to ~ovide such technical assistance as was possible in the installationof the verious signal establishments. From 20 December to 4 January, he was occupied in Oahu with negotia. tions with the Joint Tesk Force Seven CommunicationsOfficer, #my Security Agency, hay, Navy ad Air Force for the completion of the comunicetions end electronics plan end in expediting of new requests for equipment and supplles (especiallycrystals) which had been received from the forward area. The cryptographicportion of the plan provided, in addition to the tspe relay facilities at Eniwetolc,a shore-baaed crypto-centerend Sigtot teleconferenceroom edequate to the needs of Hesdquerters JTF-7, were it to move ashore. The normal l%my and Joint crypto systems held were augmentedby a number of on- end off-line Sigtot systems cnpeble of caa@ng AEC Restricted Data, provided to link the shore-basedinstallationat Eniwetok with the Task Force Flag Ship, Alr TsaikGroup, Ft Shefter, and Departnmt of the Jrmy 8nd Air Force. AnnexF of Field Order Number One, JTF 7, contained, es page F-IV-T}B1, en appendix showing this CryptographicPlen. Colonel Hatch returned from Eniwetokto Oalm 27