(2) Adherence to praseribed procedure is mandatory, Un- authorized departures from or variations in preseribed procedure invariably create confusion, reduce reliability and speed, tend to nullify security precautions, and are prohibited. If the procedure prescribed heres in does not cover a specific operating requirement, ree sorting to initiative end common sense should suffice, (3) The following besic rules are essential to transmission security and shall be strictly enforced on all radiotelephone circuits. (a) No transmission shall be made which has not been (b) The following practices are specifically forbidden, authorized by proper authority. ie Violation of radio silence. 2. Unofficial conversation between operators. 3. Excessive tuning and testing. & ‘Transmitting the operator's personal sign or . name, 5. Unauthorized use of plain languege in place of applicable prowords or operating signals. 6. Use of other than authorized prowords. (c) Z. Unauthorized use of plain language. 8. lLinkago or compromise of classified call signs and address groups by plain languag?: lisclosures or association with unclassificd call signs. ‘ 9. Profane, indecent or obscene language, The following practices are to be avoided: l. Use of excessive transmitting power. b. 2. Excessive time consumed in tuning, changing 3. Transmitting at speeds beyond the capabilitics — frequency, or adjusting equipment. of receiving operators, Phonetic Alphabet: (1) When necessary to identify any letter of the alphabet, the phonétioc alphabet listed b-low shall be wseds Letter Spoken as Letter Scoken_as Awe eee ~ =e - ABLE Newer e nw ee ~ NAN Cees aw = & = & CHARLIE Dewee eee we = = 1G Ee---- = -~- + BASY Pew = & — = PETER Qe-e- - = = — — QUEEN Re---+-+-.-- - ROR Bee-- eee ee BAKER TASK GROUP 7.4 OPRS ORDER NO, 2-54 ANNEX "E", APNDX 3 E34 Om wee wn wee = OBOE