lL OperationPlan CTG 7.3 Now 153 (f) The new (ICAC) phonetic alphabet (ALFHi, BR.VO, CO&a, etc.) is not authorized for naval use. All units shall use the naval phonetic alphabet (ABLE, Ba’ER, CHAPLIE, ete.) during CASTLE. (2) Circuits (a) The landline and submarino cable systems at Eniwotok and Bikini (including telephone and teletype) are approved for the transmission in the clear of classified informtion up to and Ancluding SECRET—SECURITY INFOMATION. (b) TOP SECRET and AEC RESTRICTED DATA will not be transmitted in the clear by electrical means at any time. (c) Extrere care mst be exercised to insure that classified information is not transmitted in the clear over any type "radio" circuit. This includes back-up radio telephone and radio teletype circuits. When a portion of a telephone circuit consists of a radio link, the operator shall inform parties that, "THIS IS 4 RaDIO CIRCUIT—CONFINE CONVERSATION TO UNCL.SSIFIED MiTCERS." (3) Traffic (a) Comply with paregraph 2108 and section 2400 of AFSiG (b) The TG 7.3 Admin Net (Channel 2) my be used to alert (c) Vessels having three or more signaluen attached shall 1248. When a classified message is scnt in the clear by visual means, the first word of the text shall be the message classification and the heading shall contain the operating signal "ZNJ" meaning- "This message contains clessified informetion. Do not tr:-nsrit over non-approve circuits." Hand flags or directional light using minimn weidtienee consistent with satisfactory commmications should be employed to send classified traffic. signal bridges. maintain a continuous signal wetch. (d) Use of Longglass and Ship's Optical Equipment. Cormanding Officers shall take positive action to insure that the use of the ship's longgless, binoculcre, and other optical equinment is restricted to personnel officially engaged in communication and navigation duties, Annox "D" of this Operation Plan (Security Annex) directs that incividuals whose duties require the use of such equivment be specifically authorized by name in written orders. Officers of the Deck and ‘Ses | " WA 14%