(b)q~G~P ~~~~~~21 s ·. SE~.RET 1:1,~~'.BIHc oJ(}-. · ti !' uf ssf'ecli\lcollqiti(llls,c radio...
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(b) (1) s (b) ,-, cc-- --- ·-- (b) (3)-P.L. 86-36 = l •"' /: I ' teP:. .. lJ u ·. 1'-/-J .... 03/-/-1- oJ(}-..b 11 = 618 }.MESSAGE= 015?33'11 lCZCZKZK :m ZllZ OE • :> __ .,._.. _________ ...,._------------------------------------------------ ..................... __. DE '1'172.CP.l .... Z_N_Y_M_r ..... rn s H p 7 2 0 (l nz FM DIRtlSA · . ru H5AlffltlGO--ATFA-,za1 T,.lf p 5 E _e.'R E T FINAL SECTION OF SIX COllTk(llS 1sirrA-1i (!ti PAR-AGRAl'llS SU NARK.ED> :vooc=tR127;;;;71 t4ATION/\L SECURITY AGl]lCY SOUTHE/\ST ASIA SIG!NT(.SUMM/\RY XXCC IN sOU'i'TTtRN \SARA\l;\HE PR!IVItlCE, TllE 46Tll U/\TTALIOll, 968Tll FROIH REPORTED Otl ACTIVITY f\LOHG TllE llORlllERll ED'GE OF TllE BOLO\/EliS PLllTE1\U. /\CCORDING TO A 2<1 M/\Y MESS/\GE TO ITS 2D COMPANY, OllE PLATOON OF Tiil: BATTALIOll'S lST CUMPAllY WAS TO CONDUCT TACUCfll f.CTIVITY ltl lllE VCCHIITY OF RAN BENG CXC 3921, 15-l'ill HJ6"."18E> l.JIHLE A TEA.11 CIJtlllllCTED RECOtlHAI55/.llCE PROllf\BLY IH Tl!E 5AME REFERDICES TO B/IU DENG WERE on·s·rn,VED rn OCTOnER 19711 Ill C:Ul1MUHIC/\TIOtl5 TllIS 8/\TTALIOll, IllDIC;.:'\.q.tlG HIAT AT LEAJT ELEMUll'S WEF!E ACTIVE Ill HIIS AREA PRIOR TO TllEIR P/\IHlCil'ATIOH_UJ RECENT ATTACKS rn HIE CAN llOUEI S/\I 15-18H IU6-l.9E) ARe,A. ( 9.-71 •· 26 2 l 3JIZ.; __ R27 0-71. 26 l 951JZ; 2/.'.Gl/LSF:l/R2J2-71, 2614l!lWZ; 2'1. ....... .Y-1SN)T628-71, 261'JIH2Z; :' IllFILlRATIOH GROUPS Cll BATTALION-SIZED> AHO 30 GROUPS;HAVE BEEH DETECTED Ill GDRS CUMMUHICATIONS. SP'BltE> LAOS INITIAL , REFERENCES TO GROUPS Kl36, Kl32 flNU cO.·nAIHED IN t. 23 M/\Y MESSA,.GE FROM THE BIIHI TRAM (BT) 35 CllQ LOCATED IH THE VIC!llITY or XC 'Jf12373, l6-45H 106-48E> AREA. THE TROOP STRENGTHS OF THESE GROUPS WERE AS 9, Z' AND PERSOHHEL, RESPECTIVELY. TWO 25 MAY MESSAGES EMANATING FRUM THE BT 14 (HQ . LOCATED AT XE 251S, 17-17H 1S6-1SE> AND BT 32 CHQ LOCATED AT WD 9762, 16-SSH . 1S5-55E) AREAS DISCLOSED THE NORTHWARD MOVEMENT OF AH AMERICAN POW. THE JTH COMMO-LIAISOH 8/\TTAU.011 REl'ORTED TllAT rnE POW WOULD nE IH rnE BT l't hREA $Itl TllE VERY NEAR FUTURE,$ AND THAT THE WAS VERY STllBORll AND H/\D ESCAPED OHCE BEFORE. A L/\TER llES5f.GE, ORIGrnflllllG rn THE Bl 32 All.EA, DISCLOSED HIAT THE PRISONER WAS TO DE TRMISFEP.:?ED FROl'I COlii'IO-LilllSON STF.TIOtl CT>-13 CUNLOCAHD> TO T-12 <XD D565, 16-52H 1A5-54E> AttD EVENTUflLLY TO T-11 CXD 1177, 16-58H -is6-B2E). SI GI HT llAS KOT srEClFICALL y DISCLOSED TH.H THIS PRISOHEr. IS THE av-HJ PILOT HHO ESCAPED Itt CT 33 CllQ LOCATED AT XD 3533, 1U6-16E> AREA. HOl-JEVEP., THE .OF REFLECTIONS OF SEARCll OPERATIONS IllTHE UT ·33 AREi\ i\llD TllE REFERENCE TU !IN i:"i\ 0 RLIER ESC.'\l>E DY THE PRISOtlER;. SUliGE.ST TllAT llE MAY BE TllE St.ME IHDIVIllUAL. C2/00/.VC:JIP.2t'.:9-71, 26213(1Z> ESE6RET S?Bl::E> V. tlURTH VIETHAM A. CIVIL CCMMUllICATIOl-IS llAtlOI-VIl:lf RADIOrRIHTrn ulfii< RE,'\C!TIVATED THE ORV CIVIL R/\DIOPRINTER lit!!( llANOI t.tlD VINM (.!AS tlOTED ACTI'IE 011 lf! MARCH FOR THE FIRST TIME SINCE 17 Al'RIL 1969. Sil:CE Hl THIS LIMK IL\5 r.EEH -:sruRADICALLY. A 17 APIUL 1971 ME5S/\GE VIHH TO H.'\llOI IlllHC/\TED THAT nECAUSE '. :. j) I. t·Jt'iP.A @'pproved for release by NSA on OB-30-2d14. Transparency Case# 6588a --------- --- ----. - -·-- ------- ) (3)-P.L. 86-36
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.... Z_N_Y_M_r ..... rn s H p ~2 7 2 0 (l nz FM DIRtlSA · . ru H5AlffltlGO--ATFA-,za1 T,.lf p 5 E _e.'R E T l:l,P~~R."1 FINAL SECTION OF SIX Y.XMMEHPU(>-~Tll27U!il COllTk(llS 1sirrA-1i (!ti PAR-AGRAl'llS SU NARK.ED> :vooc=tR127;;;;71 t4ATION/\L SECURITY AGl]lCY SOUTHE/\ST ASIA SIG!NT(.SUMM/\RY XXCC IN sOU'i'TTtRN
\SARA\l;\HE PR!IVItlCE, TllE 46Tll U/\TTALIOll, 968Tll FROIH REPORTED Otl ACTIVITY f\LOHG TllE llORlllERll ED'GE OF TllE BOLO\/EliS PLllTE1\U. /\CCORDING TO A 2<1 M/\Y MESS/\GE TO ITS 2D COMPANY, OllE PLATOON OF Tiil: BATTALIOll'S lST CUMPAllY WAS TO CONDUCT TACUCfll f.CTIVITY ltl lllE VCCHIITY OF RAN BENG CXC 3921, 15-l'ill HJ6"."18E> l.JIHLE A TEA.11 CIJtlllllCTED RECOtlHAI55/.llCE PROllf\BLY IH Tl!E 5AME M~E.~. REFERDICES TO B/IU DENG WERE on·s·rn,VED rn OCTOnER 19711 Ill C:Ul1MUHIC/\TIOtl5 "~,SOCI/\TED ~JITll TllIS 8/\TTALIOll, IllDIC;.:'\.q.tlG HIAT AT LEAJT ELEMUll'S WEF!E ACTIVE Ill HIIS AREA PRIOR TO TllEIR P..~OBfiBLE P/\IHlCil'ATIOH_UJ RECENT ATTACKS rn HIE CAN llOUEI S/\I C,?:D-!!_3_9~, 15-18H IU6-l.9E) ARe,A. ( =~1uu1:vcJIR26 9.-71 •· 26 2 l 3JIZ.; __ R27 0-71. 26 l 951JZ; 2/.'.Gl/LSF:l/R2J2-71, 2614l!lWZ; 2/'.~17lS-.Y./R233-71, 2~614'15Z; 2'1. ....... .Y-1SN)T628-71, 261'JIH2Z; T62~;71. :'
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@'pproved for release by NSA on OB-30-2d14. Transparency Case# 6588a
------------ ----. - -·-- -------
) (3)-P.L. 86-36
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UF SSf'ECli\lCOllQITI(lllS,C RADIO HLETYPE OPERATIONS WOULD STOP TEl1PORfl!HLY OH 19 APRIL /\Nl>WOUL.D<'l"JIDIRE5U11E /\S US\J1\l. MO~·IEVER llUS ll:tK WAS UMUSIU.LLY 1'.CTIVF. Utl 19 APRIL Bl.IT. U.'\S ftOT or •. srnvED Oii "ill[ H\Tll. TME 1\1\0Vf:-HORMi\l l\CTIVITY otl TllE 19 Ai'l!ll IJl\S PROB!\8LY<1)UE lll /'. 1\1\CKUlG FRUM TllE 18TH. TllIS I!i TllE Fir.ST HOTED U~1E OF Hl\UIUrP.IHJL:R .DY l)R'J CIVH EllTIT IE:> SltlCE a. SEPTErlDER 1 ?nl WIEN HIE IU.DIOPRilllER.nUK. DETIJ_l:;Ell n11.1rn1 /illt> VIET TRI CWJ 45!i't, 21-l 7H 11J5-2C.E> l.J/\S LAST
\ OBSF.R\.'ED. CONV!:.~S1\TIOllS ODSERVED iJETllEEN OPERATORS, /IT fill SlATIOl~S PREVIOUSLY ·. UTIL ;.zurn RAVHWRINHI~' HIDICAJED F:?fQUEtlT EQUIPl'IENT PROBLEtlS. f-UR THERMORE, li:ADIOPRIIHER Cll1"11'1UHJCATION:S. SEIHtlM(; ALL ttoRTH VIETllAME~1E CIVIL El:TITIES HAVE Dr::EN ODSERVED o:l\A SPQRllDIC B/\5IS: SINCE THE IHTRIJDUCTIOH OF THIS MODE OF COl~ill1 :HCATIOllS Qtf\9 .JULY 1968 •. ~!llEll " . ,, . . . . . R 1 - V Y'
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