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DOCID: 4130270

8,.6-36

sEe,w'r sPe;:E · CATEGORY = 2

~, t· M = 87

MESSAGE = 81941878

_ .................. S8EXA773 LOG LN NO. S69 DE _.,. _ ____,_l_6·'3113S8S 1241657

ZN MNSH ZKZK PP ZLZ SSD DE P S31457Z MAY 72 FM DIRNSA TO NSA(JilflEO~l~C:EfBl~~E.)'.\ NR NMCC SSO DA NANG SSO HAWAII SSO SRAG WHITE HOUSE ZEM ,., r: 5 E e R .ie' T SPBKE SECTION ONE OF THO

XXMM ~ V ENPS1FOOS3S52 2/00/VCK/R4Sl-72 SPOT REPORT FOLLOW-UP NR. l AND FINAL AVH/AVIA-A-V,O~ER-V,E[SY/I. NVN AlR/AIR DEFENSE REACTION TO U.S. AIR OPERATIONS OVER NVN S9SS-llSSZ HOURS 27 APRil 1972 xx cc

SPOT REPORT FOLLOW-UP NR. 1 AND FINAL TO 2/00/VCK/R375-72 2717SSZ APR. BETWEEN 89SSZ AND llSSZ HOURS ON 27 APRIL, NORTH VIETNAMESE AIR DEFENSE ASSOCIATED COMMUNICATIONS REFLECTING U.S.• AIR STRIKES IN THE BAI THUONG, THANH HOA, HOI XUAN AND HOA LAC AREAS. FURTHER ANALYSIS HAS PROVIDED THE FOLLOWING ADDITIONAL INFORMATION. DETAILS A. AIR SURVEILLANCE RADAR COMPANIES AT PHU DIEN CHAU CCO. 16, l9-S4N 1S5-37E>, THANH HOA CCO. 19, l9-45N 185-49E>, THAI DINH CCO. 25, 2S-23N 186-llE> AND AN UNIDENTIFIED/UNLOCATED FACILITY REPORTED U.S. AIRCRAFT I" THE THANH HOA AREA. FROM 8932 TO 1SS8Z AND 1855 TO 1S58Z, THE 293RD RECONNAISSANCE REGIMENT FILTER LINK AND THE HA DONG RADAR COMPANY CCO. 43, 2S-55H 1S5-48El REPORTED $FRIENDLY$ TRACKS <PROBABLY MIG 1 S> IN REACTION TO THE U.S. STRIKES. THREE TRACKS HERE REPORTED IN THE EARLY ACTIVITY1 THO, APPROXIMATELY 38 NAUTICAL MILES NORTH OF BAI THUONG, FLEW ON HEADINGS TOWARD THAT AIRFIELD AND SUBSEQUENTLY RETURNED NORTH TO THE VICINITY OF PHUC YEN, WHILE THE THIRD TRACK ORBITTED WEST OF PHUC YEN. THE THIRD TRACK HAS AMPLIFIED AS THO SMALL TYPE AIRCRAFT. LATER, BETWEEN 1855 AND 1S58Z, A SINGLE TRACK WAS REPORTED WHILE IN AN APPARENT LANDING PATTERN AT PHUC YEN. 8. SAM REACTIONS AT S924Z, AN UNIDENTIFIED SAM UNIT WAS DETECTED PASSING AZIMUTH/RANGE TRACKING ON AT LEAST ELEVEN HOSTILE AIRCRAFT. AT 8928Z, THE UNIT LAUNCHED A SINGLE SA-2 MISSILE AT AN UNSPECIFIED TARGET. NO TARGET DAMAGE REPORT OR POST LAUNCH REPORT HAS NOTED. THE UNIT CEASED TRACKING AT S936Z. AT 8942Z, BATTALION 53 OF THE 267TH SAM REGIMENT HAS NOTED TRACKING AT LEAST FOUR HOSTILE AIRCRAFT EAST OF THE DMZ OVER THE GULF OF TONKIN, OVER THE DMZ, AND SOUTH OF THE DMZ OVER SVN. NO WEAPONS REACTION WAS NOTED. AT S943Z, AN UNIDENTIFIED BATTALION SUBORDINATE TO THE 267TH SAM REGIMENT WAS NOTED TRACKING AT LEAST FIVE HOSTILE AIRCRAFT OVER THE DMZ AND SOUTH OF THE DMZ OVER SYN. NO WEAPONS REACTION HAS NOTED AND TRACKING CEASED AT 1Sl6Z. AT 8958Z, AN UNIDENTIFIED SAM UNIT WAS NOTED LAUNCHING A SINGLE SA-2 MISSILE AT AN UNIDENTIFIED TARGET~ NO LAUNCH PARAMETERS

-OR TARGET DAMAGE REPORTS HERE NOTED IN COMMUNICATIONS. COMMENCING AT 1213Z, THO UNIDENTIFIED SPEAKERS WERE NOTED PASSINO A POST LAUNCH REPORT CPLR) FOR BATTALION 69 OF THE NVN 275TH SAM REGIMENT. THE FOLLOWING VALUES HAVE BEEN TAKEN FROM THAT PLR, TIME OF LAUNCH, 8926Z NUMBER OF MISSILES LAUNCHED, ONE TARGET RANGE AT DETECTION, 48 KILOMETERS TARGET AZIMUTH AT DETONATION, 188

. DEGREES XXHH 988 13631 NNNN

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DOCID : 4130270

. ;(b) (3) - P . L . 86- 36 ..

~ l!CIU;J 9:P8KE - -· . :.. ... : . CATEGORY = 2

··~ . . \ ME_SSAOE = 81941116

. . t~EXA774 LOG LN NO. 169

32/3"81 1241657 H

ZKZK , PP ZLZ SSD DE P J3l457Z MAY 7Z FM DIRllSA

M =

TO HSAIUN.IFORM HIUSK~ NR NMCC SSO DA NANG 550 HAWAII SSO SRAG WHITE HOUSE .ZEM .

S. E e R E T SP8KE FINAL SECTION OF THO XXMI~ . ENPS2FOOS3S5Z ~IOO/VC~/R4Sl-72 SPOT REPORT FOLLOH-UP NR.· l AND FINAL

:A.V.tVAVIA-A-v.o ER-V.'E(SY/"I) NVN AIR/AIR DEFENSE REACTION TO U.S. AIR OPERATlONS OVER NVN S9SJ-lllSZ HOURS 27 APRIL 1972 xxcc

NOR HAS AtlY TARGET STATUS PASSED . C. NVAF REACTIONS .....,..,.,......,,.......,.........,....,......,mO::':'UT::R:--:::-T::-:-HO::" PHUC YEN BASED MIG-215 HERE SCRAMBLED AND PLACED ON A SOU1HERN HEADIHG . THE BAI THUONG CONTROLLER REPORTED TO THE PILOTS THAT F4<S> HERE PASSING OVER HIM AND IMMEDIATELY THEREAFTER THE LEAD PILOT REPORTED $DlSCOVERING THE HOSTILE.$ THE PILOTS HERE THEN ORDERED TO ATTACK. SEVERAL MINUTES LATER, THE LEAD PILOT EXCITEDLY REPORTED ONE AIRCRAFT $BURNING, FALLING, AND DESTROYED.$ DURING THE SAME TIME PERIOD, THE LEAD PILOT HARNED HIS HIHGMAN OF A SECOND AIRCRAFT BELOH HIM . THE LEAD PILOT THEN REPORTED HE HAS BREAKING AWAY . AS THE MIGS WERE HEADING TOWARDS PHUC YEN, THE PHUC YEH CONTROLLER REPORTED AN UHIDENTIFIED TARGET TO THE FRONT OF THEM; HOWEVER, BOTH MIGS LANDED SAFELY AT PHUC YEN. THO ADDITIONAL PHUC YEN BASED MIG-2l'S CONDUCTED A DEFENSIVE PATROL HEST OF PHUC YEH IN SUPPORT OF THIS FLIGHT . XXHH lSS 1362 3fS 13632 NHNN

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( b ) ( 1) ( b ) (3 ) - 50 USC 4 03 (b ) (3) - 18 USC 798 (b ) (3) - P.L. 86- 36