DOCID: 4137487

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CATEGORY = 16

MESSAGE = 8834Z89l

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SESRET SPBKE I

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·. i1~745Z Z~H FM USJ~794 . ·

TO · SCAR S X/GOlF ·. ZEM S E e R E T SAYIH SECTION ONE OF SIX

XXMM ' L

~~~gl-Z3185t 2~·86Z-CK~/RU4-67 PRELIMINARY A-~~ ~CTIVITY REPORT

INFORMATION CONTAINED HEREIN REPRESENTS PRELIMINARY ANALYSISOF SIGINT AVAILABLE TO USJ-794FOR 25, 29, 38AND 31 MAY 1967.SECTION ONE - SUMMARY OF AIR DEFENSE AND TACTICAl AIR ACTIVITY.ON 25 MA~,A MESSAGE BETWEEN THO UNIDENTIFIED TERMINALS REVEAL-ED THAT AT 87SPZ, THIS DATE,THE PORT OF NAM DINH HAD BEEN BOMBEDBY A NUMBER OF UNIDENTIFIED AIRCRAFT. THIS ACTION RESULTED INTHE WOUNDING OF PORT INHABITANTS,THE DAMAGING OF THREE BOATS ANDTHE SINKING OF TWO.ON 3JfMAY,DRV CrtfUlTICHANNEL COMMUNICATIONS FOR THE SECOND CON-SECUTIVE DAY REFLECTED SOVIET TECliNICIAN/OPERATORS EHGAGINOI~ A.CTl~AL LAUNCH ACTIVITY AT A DRV SURFACE-TO-AIR MISSILE (SAM>BATTALION.THE SOVIETS ON BOTH OCCASIONS PARTICIPATED IN THELAUNCH ACTIVITY ·AS OPERAT'CJRS lVICE THEIR NORMAL ADVISORY

ltAPACIYYSEE SECTION THREE,PART ALPHA,· .ITEM ONE>.HIGHLIGHTING ACTIVITY FOk- 31 MAY HERE•l. THE DEFENSIVE PATROLS PERFORMED BY MIGS, STAGING FROM THO DRVAIRFIELDS, IN REACTION TO U .. AIR FORCE A.M.AND P.M.STRIKE AIR-CRAFT. AL THOUGH AN ENGAGEMENT OCCURRED, THERE HAS HO RESUL TIHGDAMAGE/lOSS TO EITHER U .. OR DRV AIRCRAFT CSEE SECTION THOJ .2. THE ORV [MU.LTlCHANt~EL REFLECTIONS OF THE LAUNCHING OF A MINIMUMOF FOUR, POSSIBLY SIX, SAMS BY THO, POSSIBLY THREE, SAM BATTALIONS.THERE HERE ND LOSSES OF US. AIRCRAFT TO SAMS ON THIS DATE1 HOH-EVER,-. ._~N-.A4 HAS LOST TQ AAA <SEE sectfoN THREE, PART ALPHA, ITEMSTHO THRU FIVE). A MINIMUM OF 34 MIG SORTIES HERE FLOWN AND ACTIVITY, OTHER THANREPORTED ABOVE, CONSISTED OF PRACTICE GCI, NAVIGATIOHAL · ANDOTHER UNIDENTIFIABLE TYPE JRAINING FLIG~I; ~o;;N~ R;;~ECTED 12ACTIVE SAM BATTALIONS 1 H_HILE ELI.·N·· _T· ~ -k.IERE O:lAlHED: : SIGINT REFLECTED 28ACTIVE RADAR .. STATIONS~ ·

1 asFn filcATEHAF=~~T~~~~~~NgF R~~~R~rn ~~§¥~l~~~~cn~¥hVIrno . · REFLECTED NINE ACTIVE NAVL RADAR STATIONSTRACKING ONE AIRCRAFT ANiJ 148 SURFACE~ VESSELS.SECTION THO - FIGHTER ACTIVITYPART ALPHA DURING THE sass llOUR, A USAF '-· ----· STRIKE FORCE OF 39 F-185'S ~ND16 F-4C'S, HERE TARGETED AGAINST THE KEP ARMY BARRACKS CCS39.'f3>FOUR HANQl GIA LAM-BASED MIG-17' AUD fOUR KEP-ASEDMIG-17'S , PERFORMED DEFENSIVE PATROLS IN REACTION TO THIS STRIKEFORCE. ORV ASF INITIALLY REFLECTED THE STRIKE FORC~AT S825Z, OVERTHE GULF J~TOHKIN, SOUTHEAST OF

-HAIPHOHG. TRACKED IN THREERAIDS, AMPLIFIED AS TENTO THEHTY-FIVE HOSTILE AIRCRAFT, THESTRIKE FORCE /HEADED NURTH, TtlE LEAD FLIGHT PENETRATED DRVAIRSPACE AT 8835Z, 48NMS EAST OF HAIPHONG.· THIS FLIGHT CONTINUEDNORTH 23MS, THEN TURHED WEST AND HEADED DIRECTLY~O KEP,HHERETRACKING CEASED AT 9852.THE SECOND FLIGHT PENETRATED DRV AIRSPACEAT S842Z, 22NMS EAST OF HAIPHOUG, FLEJ.-1 GENERALL .. Y NORTH TO 8HMSEAST OF KEP HA AT S844, THEN TURNED ~IEST AND HEADED DIRECTL YTO~IARDS KEP,HHERE TRACKING CEASED AT S85lf.THE THIRD FLIGHTPEtlETRATED ORV AIRSPACE AT S846, 13MS SOUTHEAST OF YHAIPHOt:lG,HEADED GENERALL'Y NORTH AND, AT S849Z, 16MS

-EAST OF KEP HA, THEFLIGflT TURNED· WEST AND H~ADED DIRECTLY FOR KEP. THIS FLIGHT

SEeR:ET SP6KE ., (b) ( 1) v "

(b) (3)-50 USC 4 03 (b) (3)-18 USC 798 (b) (3)-P.L. 86-36

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@'pproved for release by NSA on 05-14-2014, Transparency Case# 65888

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DOCID: 4137487

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SE6RET SPSKE

HASTRACKED OVER KEP AT 8853, CIRCLED,THEN HAS DROPPED AT 8858,0N IT'S EGRESS • 14NMS SOUTHEAST OF KEP.THE INITIAL REFLECTION OF MIG ACTIVE IN REACTION TO THE USAFSTRIKE FORCE OCCURRED- AT 184iJ. AT THIS TIME, FOUR ~K.!l_RCPMfllQIED MI0-17 1 ' ~--- __ , HERE REFLECTED AIRBORNE OVER KEP. THE -IWRCOMSWERE ORDERED TO GUARD OVER THE AIRFIELD AT ALTITUDES RANGING FROM58STO 7SSFEET. THE HOSTILES WERE REFERRED TO AS FLYING ATALTITUDES RANGING FROM 838S TO 98SSFEET. THE~ORCOMS-HERE · CON-STAtlTLY ORDERED BY THE KEP AIRFIELD CONTROLLER TO REMAIN AT.LOSALTITUDES.AT 8858, THE KEP AIRFIELD CONTROLLER HARNED THE MIGS"ON' RAISE <OUR ALTITUDE) •.• HEY CTHE HOSTILES>ARE ABOVEYOUR, ALTITUDE 98SS FEET ... DON 1 GO UP, DESCEHD ..• DECREASE THEALTITUDE,DON' FOLLOW AND GO UP,COME DOWN.n AT 8852, THEKORCOM FLIGHT LEADER ACKNOWLEDGED THESE WARNINGS AND REPORTED" HILL NOT GO UP,THE-H~ST~LES ARE .UP THERE.n HE THEN ORDEREDHIS FLIGHT TO "ONER THE ALTITUDE, DO 'IT NOW. 0 THE XORCOMSORBITED OVER THE IMMEDIATE VICINITY OF KEP UNTIL S9'7Z, HHENTHEY HERE ORDER.ED TO "HITCH OFF GYRO-GUNSIGHT 11 AND LAHD .XXHH 988 NNNN

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SESRET 5f'8KI!

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(bl qqG~P ~~~~~~4a7 (b) ,-, - - --- ·--b) (3) -P.L. 86 - 36~~~~~~~~~~~~-~~~~- -------------

CATEGORY = 1

MESSAGE = 00342170

'1~71t5Z HH FM SJ-794 TO SCAR . )(/GOLl=,

SEe~Ef !l'OKE

/ ( b ) ( 3) - P. L. 8 6-3 6

ZEM 5 E 6 R E T S~VIH SECTION FOUR OF SIX

XXMM ,, ' EHPU4-Z31g57 /g6iVCK~/Rlg4-67 PRELIMINARY AIR ACTIVITY REPORT xx cc

M = 956

SAM N C

~JI LL AN ACTIVE BATTALIO~UNTIL HOT REFLECTED

FROM EJ121Z TO JJ135Z, 31 MAY, DRV1...~1UL TICllAM:IEL COnliVIUCATIOl~S _R_E ___ F_L .... Ec"""r,....,E"""o ......... T'"""ll .... E-C"""o--1~ ..... VERSATIOH OF AN UNIDENTIFIED SAM ATTALIOtl LOCATEDill THE ·· lfAIPHONG AREA.AT Bl21Z, AU UNIDENTIFIED PER~OHALITY REPORTED TllAT .A

llOSTILEAIRCRAFT HAD BEEN SHOTDOWI: THAT HIE DOLl!:~ED PILOT HAD · • .. EJECTED:AHDSUDSEQUENT . TO IHS LAHDitlG, A HELICOPTERHr1D COME TO RESCUE HIM. HIE SPEAKER STATED TllAT llE DID UOT KUOloJ IF TtlE DULJNED PILOT 11.1'.VBEE::H CAPTURED.AT IJ135Z. THIS S.\ME PERSONALITY REPORTED HI/IT SAMD.'1TTAL 1011 Vl4JJ2"\ H;\D LAUllCHED nm MISSILES CAT AH UNSPECIFIED TIME>AHD POSSIBLY DESTROYED A HOSTILE AIRCRAFT.IT IS rn·TERESTIHG TO NOTE THAT WllILE ORV rMlJlTfCllAlltlEL: cor·::w11tt::A-TIOllS FAILED TO REFLECT TllE AllOVE LAUNCH ACTIVITY BY .Vl4·~n: AHH3!f, V14-'12:1·!i\S HOTED PROBABLY RELAYING A BATTLE DAMAGE REPORTRECEIVED FROM AllOTHER §AM BATTALIOH TO THE HAIPHOHG REGIMENTALCONT~OLLER. AH UNIDENTIFIED PERSOtlALITY AT ~l4A2STATED ntATTHERE ~JAS DAMAGE TO THE CONTROL VAN: CROKEN CABLES: AllD FOUR MCllSERIOUSL Y WOUHDED.THIS SPEAKER ALSO STATED, "CAH' REPAIR ·THEMISSILEC> YET •• HE AH3ULANCE AHD THE EQUIPMENT ARE All DAMAGED-BURNED-." OPERATIONAL DATA REFLECTS THAT . 4

DURING THE COURSLOF U •• NAVYSTRIKES OH TllE LOI DONG lllH> CONG f'lY TRAtlSllIPNENT POINTS,ShM SITEVHD9~WAS BOMBARDED WITH 76ROCKETS C2.75IHCll)i\T APPROXIMATELYGlOO.A SECOllDARY EXPLOSION WAS OBSERVED CY TllESE PILOTS. HIISSTRIKE Oii SUE YNCJ'13 IS BELIEVED TO CORRELllTE l•JITll TllE REPORTIIHERCEPTED FROM Vl41J2:. VH093 HAS llEEtl CORRELATED mm TllE COllllHIOEtHIFHD SArl <B.\TTALION :Vl474.'.FAtlSONG AND SPOOllREST IMPACTS HAV;EflEEH HITERCEPTED Ill TllE VICHHTY OF VNS93SIHCE AT LEAST llDECEMBER, 1966. OPERATIOll.\L DATA ALSO REFLECTS THAT EIGHT SAMSl~ERE SIGllTED BY .!!_,_,<;_,_PILOTS BEHJEEN !Hl45Z /l.IW 11101Z: HO!·!EVER, NOUE OF THESE . SIGHTINGS CAN BE CORRELATED TO THE ABOVE ACTIVITY.3.FROM 0211 TO 025SZ,

-31MAY. ORV MUL TICHAIHlEb COMMUHICATimlSREFLECTED A POST-LAUtlCH REPORT DY st.M . BATTALION Vl't71l:LOCATED AT2113 11J614E. AT fl211Z, AN UllIDENTIFIED PERSllllALITY REPORTED THAT AT Dll9Z, TWOMISSILES HAD BEEN ALUllCHED AGAIHST A FLIGHT UF FOUR AIRCRAFT IDEllTIFIED AS "A3C, THEii A4 AND F8". THE FIRST MISSILE ~JASLAUJlCll::U USlllG TllE INTERCEPT f'IETllOD WITH A SIT'E..:.0-ATARGET CST>RtliiGE OF 11 lli"IS OH All AZHlUHI OF Jf55 DEGREES WHILE TllE Sr=COHDMISSILE WAS LAUNCliEp,.'IS THE TARGET l!AS EGRESSillG, USING TllETRAILillG f'IEHIOD WITH A ST RAllGE OF HJ:IMS Otl All /,ZIMUTll OF U!ii!DEGREES. TllE "RF" CLEl\O MIGLE> MEHIOD OF GUIDflllCE ~IAS USED FORnorn Lt.UllCHES. TllE SPEAKER

°":MADE ONE REFERENCE TO ECM,HOl~EVER,Itf·TllE PAST TllE METHOD OF GUIDANCE USED <LEAD ANGLE> HAS PRIMAR-ILY IlEEH DEPLOYED AG.\INST·TARGETS NOT EMPLOYIHG ...

5i~RH S~BIEE v

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DOCID: 4137487

.~ ..• si;:eur SPBICE

ECM.OPERATIONAL DATA INDICATES THAT OllE A4 CFLYIH~ EAGLE 223> WASLOST Itl THE VICINITY OF 2134 l063rJE AT lJ115Z BUT THIS LOSS ~JASV ATTRillUTED TO Afl..'1 VICE SAMS.SEVERAL SAMS I.JERE SIGHTEDSY U.S. PILOTS Ill THIS AREA.'1.r-1:m1 054<;Z TO C651, 31MAY, ORV ~IU.Ltl:Ciii'.tltlEL COMMUHICATIOtlSREFLECTED A POST-Li'.UNCll REPORT BY Sf\M DATTALION ·VVl72lOCATED AT21J56 11J556. AT 054'•• TllE 2381t REGUlDITAL COllTl~OLLER REQUESTED POST-LAUt:CH HIFOR~ll\TIOU FROM SAM Dl\TTALIOW-\i1<172. Ill THE EtlSUIHGCONVERSATIOH THE SITE REPORTED THAT A TARGET,ID~~TIFIED AS TWOF4'S,WAS INITIALLY PICKED UP OH AH AZIMUTlt OF llJ[J DEGREES 1.JITllA ST RAllGE Of 22,63t!MS.AT 11534, THE FIRST MISSILE HAS LAUtlCllEDIHTH A ST RANGE OF llJ. 8 llMS OU. AH AZIMUTll OF 90 DEGREES.SIXSECOtlDS LATEn, A SECOtlD MISSILE WAS LAUHCHED l-JITH A ST Rfl.HGE OF8.64HMS ON AH AZIMUTH· OF 92 DEGREES.TllE TARGET REPORTEDLY TOOKEVASIVE ACTIOH CDIVEDltlD THE LAUNCHES WERE UNSUCCESSFUL. ATD551,Ill A FillAL HRAP-P OF TUE ACTIVITY, H UIHDEtlTIFIED SPEA-KER AT TllE SITE REPORTED TUAT 1:0 JAMMillG OCCURl!ED OH THE IIHTIALDETECTIOH OF THE TARGET:- HmJEVER,Al THE Til1E OF THE LAUllCMESHIE SITE EXPERIENCED JAMMING DEFINED AS "ONFUSIOH AND FALSETRACE DECEPTION". OPERATIONAL DATA ItlDICATES THAT - NO SAMS WERE SIGHTED BY U .. PILOTS DURING TllIS TIME FRAME.XXHH 89r NN~N

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SE6RET SPBiO:; . . '

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