DOCID: 4139086

_, . •.

CATEGORY = 2 M = 18

MESSAGE ~ •1848484 February 1972

~g~~~~~4 LOG LN NO. 169

~Jlf Jf4aZlS:l - ··· (b) (3)-P .L. 86-36.

~KZK pp 6h~ i~ // / . FM DIRNSA I ./

TO \tf$A!~l!_lt1p· AL-FA 1 J;'?N_QG)

Z¥Ha \~ S E \~ ·-R E T- lf~_.\RA 1511TAR CISllTAR IN PARAGRAPHS SO MARKED> SECTION ONE OF FIVE REPiDDUCTION/FURTHER DISSEMINATION OF THIS DOCUMENT AS A HHOLE· PROHIBITED HITHOUT PRIOR DIRNSA CONCUR- RENCE. SELECTED ITEMS MAY BE EXTRACTED AND FURTHER DISSEMINATED ON A STRICT NEED TO KNOH BASIS. SIOINT SUMl.'IARY 41•11·~ INFORMATION IN THIS REPORT IS THAT AVAILABLE TO NSA AS OF l5df EST 17 f.EJRUARY·~ 1972 AND IS BASED ENTIRELY ON SIGINT EXCEPT WHERE OTHER- WISE SPECIFICALLY . IDENTIFIED. VIETNAMESE COMMUNIST FRONT 4 TO INITIATE FRONT-HIDE ATTACKS ON 17 FEBRUARY AN ASSOCIATE OF FRONT 4 STATED THAT A FRONT-HIDE ATTACK HAS TO BEGIN AT "IDNIGHT ON 19 FEBRUARY AND EXTEND UNTIL 25 FEBRUARY. THE EMPHASIS EVIDENTLY HILL BE INDIRECT FIRE ATTACKS, AS UNITS ARE DISCUSSING THE MOVEMENT OF ROCKETS AND MORTAR SHELLS. WHILE NO SPECIFIC TARGETS HERE MENTIONED, DISTRICT UNITS HE~E ADVISED THAT THEY WOULD RECEIVE THEIR TARGET LISTS B~SENGER. OTHE~

m, NT UNITS ·CONTINUE THEIR RECONNAISSANCE EFFORTS. <3.100.11. _:-R41-72> UEGRET NVA TANKS CONTINUE TO DEPLOY IHFORMATION OF 16 FEBR INDICATES lhAT

VIET- NAHESE TANK UNITS MAY HAVE MOVED HITHIN THE / BOUNDARIES OF SOUTH VIETNAM. A CONVERSATION BETWEEN TANK CREWMEN REFERRED JO A $TDC CANt <POSSIBLY TA CAN, HHICH IS LOCATED SOUTH OF OAK TO) AND THE NECESSITY FOR STOPPING TO REFUEL AND RESUP- PLY. ALTHOUGH A FIRM TACTI~Al AREADF OPERATIONS HAS NOT BE ASCERTAINED, IT IS BELIEVED THAT THESE TANKS ARE DEPLOYING ALONG NATIONAL ROUTE lti IN KONTUM PROVINCE, SOUTH V~ ETNAM. ,PRDVIOUSLY, _SIOINT REVEALED THE DEPLOYMENT OF A_S MANY AS 31 NV TANKS; 1THROUGH LADS TOWARD SOUTH VIETNAM. .· CSS35-721 2/00!.V.C;J.l·R71-72l NORTH .'1IETNAMESE SAM REACTION TO HOSTILE. AIR ACTIVITY OVER SOUTHERN NO -fH VIETNAM ON 17 FEBRUARY NORTH VIETNAMESE SAM-ASSOCIATED CDMMUNICA- TIONS REFLECTED AIR DEFENSE REACTIONS TO $HOSTILE• AIR VlTY OVER SOUTHERN NORTH v:r;ErnAH,. RESUL TINO IN THE REPORTED

CRAFT AND THE CAPTURE OF AT LEAST.THREE AIRCREW MEMBERS. --.rn;;·g MO SHOOT DOHNS HAS NOT BEEN ATTRIBUTED TO ANY SPECIFIC TYPI!·

HOWEVER, THE SECOND AIRCRAFT MAS DOHNED BY ONE SA-2 MISSILE LAUNCHED BY THE 89TH BATTALION OF THE 274TH SAM REGIMENT: THROUGHOUT THE DAY'S ACTIVITY'· AT LEAST FIVE MISSILES HERE LAUNCHED BY ELEMENTS OF THE 267TH SAM REGIMENT AND lHE 274TH SAM REGIMENT, B.OTH OF WHICH ARE IN THE GENERAL DONG HUI VICINITY OF LONER QUANG BINH PROVINCE~ OPERATIONAL REPORTS REVEALED THAT A --------ND A USAF F-'i HE~E LOST ON THE 17TH. IN ADDITION,. SIOINT HAS CONFIRMED THAT THE 89TH RATHER THAN THE 87TH BATTALION OF THE 27'iTH SAM . -~,._,AN UNIDENTIFIEl> AIRCRAFT ANILCAPU_T_ RED BOTH CREW MEMBERS ON

-. ~~S 4•-121 Z.l'OO/VCK7iUti8-72; UOO.(L.SV.CK/,) Rl5-:.Z2 AND _f_OLLOH-UPS> «l!CIU!T " 9P8KE> NORTH -v1ETNAM R£~0ESTS ASSI}f ANC~ lN ltEST08ATiotr OF) )--~ ~Oft111-DAMAOED POWER PlANT'' .POLANJ> AND CZECHOSLOVAKIA HERE ASKED ON -12 -FEBRUARY. Ta) )~SSIST NORTH VIETNAM IN THE_ RESTORATION OF A sa.,•81 KW CAPACITY ELECTRIC POWER'; t PLANT LOCATED .HEAR THE QUANO./NlHH MINING REGION IN THE NORTHEAST SECTOR OF THE_) ( COUNTRY. ACCORDING TO HANOI THIS FACILITY HAD BEEN SEVERELY DAMAGl;.D....B,Y AMERICAN'--... \ AIRC8AFT AND R'ECONS"TR.U.C.JIOH C.OSTS .HOU(]) . EXCEEQ· -n1 MILLION. J2Xl'.OD"'--.YR197-7Z> ) -"'-... __ ,,.... / ' -::.: ~.::::: . :. ~ ·· ···· ··· · ···· - .- . . - -· . - - .. - ____ ... ---

- i~ ;1 1 1 'f s•1'" Uriff~ (b) (3)-50 USC 403 (b) (3)-18 USC 798

"'.' (b) (3)-P .L. 86-36

l!\pproved for release by NSA on 07-03-2014, Transparency Case# 6588a

··.

REFNo's

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DOCID: 4139086

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-- - -· --------- ----- --------

DOCID: 4139086

Classification: Te~ SEe~ET//~I

*** Document 1 of 1 *** PIECE YR72 (1). DOCN 000050412 DE DE I In

#0700 0482153 ZNY ZNY MMNSH ZKZK PP ZLZ DE P l 72145Z FEEL7-2 FM TO

FM DIRNSA TO NSA/ZULU ALF;J._ __ ___,kNOG ZEM

CLAS T Q J!l g g £ i;;\ E T l:JMSR.111 IGII'Y'FiR ( IOII'fAR TN PARAGRAPHS SO MARKED) SECTION ONE OF FIVE REPRODUCTION/FURTHER DISSEMINATION OF THIS DOCUMENT AS A WHOLE PROHIBITED WITHOUT PRIOR DIRNSA CONCUR- RENCE. SELECTED ITEMS MAY BE EXTRACTED AND FURTHER DISSEMINATED ON A STRICT NEED TO.KNOW BASIS. SIGINT SUMMARY 41-72 INFORMATION IN THIS REPORT IS THAT AVAILABLE TO NSA AS OF 1500 EST 17 FEBRUARY 1912 AND IS BASED ENTIRELY ON SIGINT EXCEPT WHERE OTHER-.WISE SPECIFICALLY IDENTIFIED. VIETNAMESE COMMUNIST FRONT 4 TO INITIATE FRONT-WIDE ATTACKS ON 17 FEBRUARY AN ASSOCIATE OF FRONT 4 STATED THAT A FRONT-WIDE ATTACK WAS TO BEGIN AT MIDNIGHT ON 19 FEBRUARY AND EXTEND UNTIL 25 FEBRUARY. THE EMPHASIS EVIDENTLY WILL BE INDIRECT FIRE ATTACKS, A~ONITS ARE DISCUSSING THE MOVEMENT OF ROCKETS AND MORTAR SHELLS. WHILE NO SPECIFIC TARGETS WERE MENTIONED, DISTRICT UNITS WERE ADVISED THAT THEY WOULD RECEIVE THEIR TARGET LISTS BY MESSENGER. OTHER FRONT UNITS CONTINUE THEIR RECONNAISSANCE EFFORTS.

SERI SERIAL~ (3/00/ TEXT c::::J'R41-72) (OEiORE'Y' OPOHE) NVA TANKS CONTINUE TO DEPLOY

INFORMATION OF 16 FEBRUARY INDICATES THAT NORTH VIET- NAMESE TANK UNITS MAY HAVE MOVED WITHIN THE BOUNDARIES OF SOUTH VIETNAM. A CONVERSATION BETWEEN TANK CREWMEN REFERRED TO A =TOC CAN= (POSSIBLY TA CAN, WHICH IS LOCATED SOUTH OF OAK TO) AND THE NECESSITY FOR STOPPING TO REFUEL AND RESUP­PLY. ALTHOUGH A FIRM TACTICAL AREA OF OPERATIONS HAS NOT BE ASCERTAINED, IT IS BELIEVED THAT THESE TANKS ARE DEPLOYING ALONG NATIONAL ROUTE 14 IN KONTUM PROVINCE, SOUTH VIETNAM. PROVIOUSLY, SIGINT REVEALED THE DEPLOYMENT OF AS MANY AS 31 NVA TANKS THROUGH LAOS TOWARD SOUTH VIETNAM. (SS35-72; 2/00/VCJ/R71-72) (OEORET OPOHE) NORTH VIETNAMESE SAM REACTION TO HOSTILE AIR ACTIVITY OVER SOUTHERN NORTH VIETNAM ON 17 FEBRUARY NORTH VIETNAMESE SAM-ASSOCIATED COMMUNICA- TIONS REFLECTED AIR DEFENSE REACTIONS TO =HOSTILE= AIR ACTIVITY OVER SOUTHERN NORTH VIETNAM, RESULTING IN THE REPORTED SHOOT DOWN OF TWO AIRCRAFT AND THE CAPTURE OF AT LEAST THREE AIRCREW MEMBERS. THE FIRST OF THESE TWO SHOOT DOWNS HAS NOT BEEN ATTRIBUTED TO ANY SPECIFIC TYPE OF ORDNANCE; HOWEVER, THE SECOND AIRCRAFT WAS DOWNED BY ONE SA-2 MISSILE .LAUNCHED BY THE 89TH BATTALION OF THE 274TH SAM REGIMENT. THROUGHOUT

( Q ) (l )

(Gl I J J - 5 0 use 403 (r i 13i - lR USC 798 l l: I 13 1-P. L . BG- J G

b) (3)-P.L. 8€-36

Classified By:!.__ _ __. Derived From: NSA/CSSM 1-52

Dated: 20070108

Declassify On: 20380301

DOCID: 4139086 SECRE i//Si

THE DAY'S ACTIVITY, AT LEAST FIVE MISSILES WERE LAUNCHED BY ELEMENTS OF THE 267TH SAM REGIMENT AND THE 274TH SAM REGIMENT, BOTH OF WHICH ARE IN THE GENERAL DONG HOI VICINITY OF LOWER QUANG BINH PROVINCE.O~~BJ\T~()NAL REPORTS REVEALED -THAT A I I F=105 AND A USAF F-4 WERE LOST ON THE 17TH. IN ADDITION, SIGINT HAS CONFIRMED THAT THE 89TH RATHER THAN THE 87TH BATTALION OF THE 274TH SAM REGIMENT SHOT DOWN AN UNIDENTIFIED AIRCRAFT AND CAPUTRED BOTH CREW MEMBERS ON 16 FEBRUARY. (SS 40-72; 2/00/VCK/Rl48-72; 2/00/LSVCK/ RlS-72 AND FOLLOW-UPS) (SEGR61' SPOI4~) NORTH VIETNAM REQUESTS ASSISTANCE IN RESTORATION OF BOMB-DAMAGED POWER PLANT POLAND AND CZECHOSLOVAKIA WERE ASKED ON 12 FEBRUARY TO ASSIST NORTH VIETNAM IN THE RESTORATION OF A 50,000 KW CAPACITY ELECTRIC POWER PLANT LOCATED NEAR THE QUANG NINH MINING REGION IN THE NORTHEAST SECTOR OF THE COUNTRY. ACCORDING TO HANOI THIS FACILITY HAD BEEN SEVERELY DAMAGED BY AMERICAN AIRCRAFT

!b l ~l ! lb ! (J) - 50 U3C :; OJ fb) (3 ) - J.P UJ: 79S (b) (3) - P . L . ~6- 3 6

(b) {3 )-P.L. 8b-36

*AND RECONSTRUCTION COSTS WOULD EXCEED @1 MILLION. (2X/OO~Rl97-72)

(:3!!:efi:E:'f £19Rls:Y) 900 #0700 NNNN z

===EOD=== ===EOD===

Classified By:I...._ __ _. Derived From: NSA/CSSM 1-52

Dated: 20070108 Declassify On: 20380301