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6. Additional use of radar by North Koreans indicated: AA, ~ recennyrecently available North KoreanK orean Air Force lnessageMessage of 12 March indicated that an air unit, possibly at Sariwon, waswas to use "detectors" and wanted to know what "type of detecting machine.machin'e. . .is to be used." Similarly, the 2lst21st North KoreanKorean Independent Antiair-Antiair- craft Artillery Regiment reported on 26 April that an individual "who"who waswas beingbeing trainedtrained toto bebe aa radarradar operator"operator" must return toto hishis unit.unit. (SUEDE ASAPAC Japan, 8621 AAU Spot 3370A,33704, 25 Apr; 501st501st Comm Recon Grp Koreaj5RSM/11503,Korea,,15RSM/11503, 27 Apr 52)52) I Comment:CoMment: Although the Communistshave mademade considerable use of radar inin for antiaircraft artillery direction, ground-controlledground-controlled intercept,intercept, andand earlyearly warning,warning, it was generally believed that.Sovietthat Soviet personnel werewere operating the bulk of thisthis equipment.equipment. SariwonSarawon has been idedtifiedideritified as the site of an early- warning radarradar installation,installation, possibly servedserved by SovietSoviet personnel,personnel] and this message suggestssuggests thatthat thethe NorthNorth KoreanKorean airair unitunit there might receivereceive additiOnaladditional equipmentequipment ofof theirtheir own.own.

7. "Orientation" toto bebe conducted atat NorthNorth Korean'SupremeKorean Supreme Headquarters: An unlocated element of ththee North Korean Railroad SecuritySecurity DivisionDivision waswas informedinformed onon 2525 April.ApriT that "the persons attending the Supreme Headquarters orientation will arrivearrive byby 2626 April."April." (SUEDE(SUEDE.330th 330th Comm Recon CoCo Korea,Korea, ALT-940, 2626 AprApr 52)52)

Comment: An increase inin the number of staff meetings and conferences]cBTOTRITes, particularlyparticularly inin tacticaltactical units,units, has generally preceded snemyenemy offensivesoffensives inin thethe past.past. It is probable, however.,however, thatthat thisthis meetingmeeting isis forfor politicalpolitical or logistical instruction, rather thanthan forfor operationaloperational planning.planning.

" '1 8. North Korean Air Force may be upingusing airfield within Korea: InIn thethe latelate afternoon of 25 AApril, pril, reports a US mrceAir-Force field unit, North Korea air force voice traffic indicated that an operationaloperatiopal airfieldairfield waswas undergoingundergoing repairs.repairs. A Korean ground control station informed an aircraft to "come in'onein 'one hour later.later. Wele are'are' cleaningcleaning thethe playgrodnd"playgronnd" (cover-hame(covername forfor airfield).airfield) .

4 30 Apr 52 TOP SECRET SUEDE c ~PPROVEDFOR RELEASERELEASE 1 IDPPROVED(DATE:ATE: 18-Mar-201018-Mar-2010 I

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The field unit comments that this isis the first such OcCuTmnceoccurrence sincesince 2323 NovemberNovember 1951,1951, whenwhen a North Korean ground station reported thatthat "the"the playground isis dirtied." UN aircraft hadhad strafedstrafed UijuUiju airfieldairfield thatthat day.day. (SUEDE 6920 Security Grp Johnson AB Japan,APJapan,AP 604,604, 2828 Apr 52)52) Comment: Both andand Uiju were operational on 25 April. Recently North Korean air activity has been noted atat Sariwon,Sarlwon, andand Yonpo,Yonpo, nearnear .

9.9 Mechanized NorthNmtb Korean unit believed deactivated.deactivated. mentioned: AnAn unidentifiedunidentified NorthNorth KoreanKorean armoredarmored- -_- unitunit -~ in'the Tn' the TiVE,E7WiliPyongyang area area mentioned mentioned thethe "17th"17th Division"Division" onon 24 April. The texttext ofof thethe messagemessage diddid notnot indicateiladicate thethe statusstatus ofof thethe Division. .(SUEDE(SUEDE 330th330th CommCorn ReconRecon CoCo Korea, ALT-935,ALT-935, 26 Apr 52)52)

Comment: It is generally thought that the 17th17th North Koreari-GainizedKorean Mechanized DivisionDivision waswas deactivated,deactivated, andand thatthat itsits personnel andand equipmentequipmeqt were transferredtransferred toto thethe 105th105th Armored, 10th10th Mechanized and and thethe newlynewly formed mobile artillery brigades. While thisthis messagemessage alone alone does, doeslnbt nc5t refute the previous indicationsindications thatthat thethe 17th17th was deacti-deacti- vated, itit raises thethe possibilitypossibility thatthat thisthis unitunit stillstill exists.exists.

10. Chinese Communist artillery unit is in "bivouac""bivouac1' following relief:relief: Headquarters of the 2nd ChineseChinese Communist ArtillArtilleryery DivisionDivision inin west.west centralcentral KoreaKorea requested itsits recently relieved 29th29th Artillery Regiment toto "report"report byby letter a summary 0%of the transfer of your battalion's positions, alsoalso thethe presentpresent arrangementarrangement ofof youryour bivouacbivouac area." (SUEDE 501st Comm Recon Grp Korea, K-2472,K-2472, 26.Apr26 Apr 52)52) Comment: Elements of the 29th Artillery Regiment were relieved from combat between 20 and24aud24 April. This message, although indicatingindicating thatthat the 29th has not returned toto combat in another sector of the front, reveals thatthat itit isis still located inin some proximity toto thethe front lines.lines. -

11. Large flight of Soviet jets at Tungfeng in central Manchuria: A ChineseCh inese message ofof 2626 AprilApril reportedreported 3535 SovietSoviet MIG-15's15's on aa trainingtraining flightflight atat Tungfeng, 120120 miles north- east of Mukden.Hiikden. Transports subordinate to the Soviet Union continue toto make shuttleshuttle flightsflights fromfroqr Mukden intointo thethe TungfengTungf eng area.area

For more information on OCR and PDF Compression go to our website The AirAir ForceForce commentscomments thatthat thethe appearance appearance of, of 3535 Soviet jets isis anotheranother indicationindication thatthat aa SovietSoviet fighterfighter unit has just moved there.there. (SUEDE Air Force Roundup 82,82, 28 Apr 52)52) Comment: A Chinese message of 2222 AprilApril revealedrevealed that a SovietSoviet airair unitunit wasWaf3 atat Tungfeng.Tungfeng. The numbernumber ofof MfG-15'sMIG-15's observed flying there on 26 April is the normal complement ofof aa SovietSoviet airair regiment.regiment.

6 30 AprAps 5252 . TOP SECRET SUEDE

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