1/'~.J 3 ighted both Ttt:Jually :t:ld 'oy rad.ar OJ :~e :,Jilo : 3u'1d :rada~ o ossible that 6 un1dentit'isd a.J rcrai'~ .v~r~ :l.n7olved i n the 1nt~rc.,ptlon. rn~ sightin.:t;s O!J ... urrad f.l.C niJ:ht; b.o.v~v~r, ';~9r-~ e~rned althou!7h no d tailJ N~re o~s ..... ,~i. .l::> t!'3.i~a or ex- : >o rted as much sreat.ar cr_arl th'lt of ~:;3 t'- ,)1. I c a ) .30 ~a:i a hi ~h r9. t e or ac c ler d; ton ar.d ~ot~l:l :;:> almo 3 ... .3: r'=i i ;;b. t up )r i..Jwn out o~ r'3.dti~ el~'TJ.t !..On ll'ili ~ J. .hr:'l ')':> l 'c~ J c.:::\rne-:1 The P-n.L int~rc~ptoro air0raft .va3 '/lsi::,l~ :o ~;roun.d r!l~a~ cnly periodlcalrr a s it ~le~ i.o. :3.:J.J. )Ct . f t:")<:! ? ~1anent 3round r ~turn 9.rs a i :1 wh 1ch s"a r-ch ~as i n g co r:du c I; ad. fhe o n l y o o-1 J~ct picked u p b y the groun d radar ~3.3 tha F - 61. 3d~imated distance batw~ en intr,rce?tor (:f- 51) 3.r:d objects i n each si~ht ing.is as follos: First pickad up ac 10 milds and lost a t 6,000 feet. Third picked up at 3 mil~s and lost a t 1 0 milds ~our, five and six: all pi~ked up at 9 mils~ and lost at 1200 f ~ . The 1 a s t t h r ~ e s 1 gh t1 n g 3 took ::> 1 ace d u r in;.; a 1 ~ min u t 6 p~r1od. I n ~ach instance the ? -61 de~d~t~d tha o0~a a9prox- l~ately 9 m!l~s ah~ad, slo~ly clo3ed to ~3thi~ 12,JCO fg~t vb~n the obj~ct would sudd9nly accelergt~ 3U ~ed, di;~ and ACCEI .. ERXriON .UJD COULD GO .AL.-103~' -\lGG.r 1JP c;t IX; .'.N 0011 0~ 8 .. AD.A ... ~ ELZVATICN ~It/ CJ\....:f "lASH D.. C. J.O G G hl- C viJB.J : v1h.:-.:b refers t-:l u .... r t 1 of ~\X 4o~o Iat3rcsp-cor ;=l\.r"ru .. t visible :o .o:-ro'L""ld r~4.lr 1nl.v peri:lit"'.-!ll:r 3cl it fle'~ in ,!..."lcl Ot1t 0f ne:Jnanent ground return art')a ":1 \oJbi~h sear~ /e s c~nduc t arl. Ti ;!e or' ol("..:cuo of in :zrceptor by .;round r..,c19.r not 1')?-.g-ed Si.:l.:e Dic'<t..-o l-(f=IS identifi~ci e c..'r). ti~ lS f,...ir:=n .:r "'"'"'ld lo-s r>n :friez~cJ , not ke:Pt ' dar r~"':urn i .. 1 th C...'l in~t'Ul~e ._. ..... s cler enou.g~ r.o establi..,n .1r~a. It is firrnl,y est:-ililiBhed th.2t ~.:.e only obJ~,;t C.etccred at :m:r i.""Je by ~ounJ. r3.dar ~t s i t e ..:>ne o.f tni s C.") nd airborn~ a t tr..e ti:;1e of 5i.~r-.tin.:;. :~S"':.l1l:)tcd di3t,":l:l .e b~t.~en inter~eutor ~nd o"'vj~cts 1n e~C!l si.g!1ti!"1.~ :is ,t:ls )llows: 'Ibi rd r .. :rid.<.3fl un ~.t 3 miles :.~ od l ost; c.t 10 11ile '"' .F">,.tr , firre 2nd six: a l l 'Dicked uo ~t 9 'Tlilea. ll/~t t 1200 f-eet. The l:-3~t thr~e n i$tint;s took pl~ce c!ur in.g '3. 10 ni.ilU'" ~ ueri::>d. I.a {."'nt:b lnJt~nce th~ .F-61 detacted ti1e t)'.J.j.::o~t 1.r>rJi'.>Xi"'l<:lt.ely 9 miles ,_11~ad. slo,..rl.r ~.;losed to wi tnm n.""L 12000f t .~n~n L13 oo j-ect ::;uddanly L1CCeler3te\i ~:re'="d, doYe 31ld ~3 l03 t fro11 tna q i1borne r?..aarscop~ .. T:1tarcen:or ?t,e!noted to ef:Jc t no:r:tal oi'<UU lJ~r diTil~ ;:;lso t ' h U!lS,t'::ce~.;;-"ul -:-aca ti;:;e, .A.f'ter 6 i . ..::l~l:l. n~d Ji.:l.-ln l0st, tne rerr.J. t .for H~.1tnar ~nd .. ,i~init.y of inci~:en"'., yt~ tr'er r ~orts :f0r :n~ B'llhlo'-<.a :3rea &.n..l.icated. unli.:Ji r.ed ceili.n.::;, ::-:a '..ri.ncl ~"ll~, 7isibili7.y :'il:r! 5 to 6 mile .. -n~h :1a.ze clud. core rage 12 to lUQ(;Q feet s cs.tte:-,:)d. ?.1:rt II. 3.ruLa.r sit~<-1 rrenti:::>n ed i:1 p r evious radios are sit:~ 1: 1\.t 3hi~ano-Shi=na 3ast P..nd s ite 13: a t Fn'caa-!Jhima a t 32 Us' N / J!QAB/ CG :\MC ITE AX FoUR NINE ::ouR n tREE A -T~Jo T)n TWQ CMA ~T'JQ. TK!F.i. OCTOBf.R ONE NIUE' fCUR l:!Gl1T Ci1.' . iiiCll NTYF.l'iS: ~0 P~liT oM;,. o~t ~ BL J. A Y r OUR El~ll! ii VE Z~ 0 C ~1A ONr S 1X or,To~t:rt ;.. ND 7 0 LLOWlNG lNYO'FlMA'IION I S StrnMITTi D CLN ?A~T CNF. PD 'fN1"7'KC"r?TOR .~1-:tCJ. ~T JSI'SLZ ":'0 G!OUND !t~DA~ ONLY. PE~IODIC.ltLLY AS IT 7LF::J lN l.ND Ot.rr OF PE.'M~NENT G~OUND R~TURN Ait~ IN 'JHICH SZ.-\RC}f .JJAS CCNDUCiF.D ?D TI~1E '"'lf J!C:{UP OF IN7i:lC:!:?"IOR BY G~OUND ~ ... DA:-t 1~01' L'"'or,zn 3l~C7. ?!CXUP 'Gtt -o ZS \Bt I S! t , :.rtjaN . :1EA PD IT IS 7I I1~L Y F31".\ 3L!SH:!:D T:t ! 't' F. C'NL Y B..J?CT ANY TI~Z BY G~OUND RAVA~ " IS C rt ND JS C!..N ~!JST ?ICi{tD UP T ~NE z:-:tO 1ILFS OdE D.?.rZCTF.D THE OBJ!.CT A?P:tO~<It1.~TELY NI~E ~1!Lt:S HF.AD CMA SLOWLY ,: r.D T 0 :JrTHIN ONE T'JO Z!.i<O ZDO ZE;iO FEET 'vHF'N 1'HE 0'3.J FCT > UDD'FNLY :ONilNUID TO: SE'A!ICll THE Aft[A UNTIL A?P!OXlMATIL.Y 7F:10 Ot'H: THRll ~ZRO ITZM C~A ON ~IX OCTOBER PD CONfl~MIN~ ?~ONF ~F.QUf.ST FOR .JEATHF.R \ ND VICINITY ())" INCIDENT CMA W!,,TlfM Jt!:POPtTS '7'0~ .... HF--r;-UK'JOKA ~"~r.' "::.rO~CAiYD TJNLI~IT'ED CEILNG C:vtA ~l:;)S ";AL.'l C:1A "T1513!L~1'Y 71VE li1 1\MC torm N. 10-SIJ (Rev 20 F b 4di Vlf-lU JUN J :.oc~ ti~AOQUARTERS I~ REPlY AOOJtESS BCTH CC~IMUNICATION AN() EN- 'iHOPS TO CO."-M..\NOING "' NERAL, A I R o\ArRIH COMMAND, ATT!!NTJCN FOL- AIR MATERIEL COMMAND W~IGHT? TT:RSON AI~ FORCE 3ASE 0..\YiOH, OHIO JWING OFfiCI! S f.'f\80L, Chi cf u t' .:.> 1jaJ.'f U:ri~cd dtates Air Fo::-ce r ~ll"l ~ SCO J Gal i.:'orn:i a ( ~50~:ooz), r e ~:u,..lin6 radar si;htin ~ of uniderrtilied e1..1r tal ooject ~ . .r.:.'b l ra.dar .. 7. is req.tas~ad t'1a~ snrce Base Tnr..e . lt~nce Per:.iner.t l.nf or:m :;io!'l reld.tiY'3 to t:1~ rcoo:rt.er:l oojec~ is a s .l o LJ. :y.vs.: a~ .:r1s oGject ~pparently practicing radar C'l'lsive tactics .: .~n i 't dis appeared f rom tb.e scop e peri cdi cally, o r ,l,9.3 it ru.nni..'1?, inLo nonnal sk1:;> nul 1" 3ones aff~cting a?pearance on scope of all LJ~SSlFTED ::l ~ :J ~liL F.S till'H ~f. Z~ ~LOUD nv . Gi OlE T~O -~ 71VE i1!NUTES NOJn"H D~SH CNF. T'-10 :::;tGHT DEG~E:F.S rOU:t lE110 ~INU1'iS LA3T 'l Parai*Jras& not required. Handle o ,; --. _ cocrespondene irdica ted con7enti onal i :u no:-1al i .1Jication :->n ::;c1;.13 suc;l TJ 3. It .:.S rf!ql.:s.3tad all ;>..,rtine:lt ~taGeriol. b .... i.\)~:r'l.!d~d J..o i1 .. 1;0, Da;yton, Ohio , attenti')n .CTAI0- 3 U Chia~, Int8lli ''~ o;.l-tyilPnt AFOlR-C0- 2 (A-]db':>) ls t Ir..d Dep t . of t h e Air l' nrce , Hq t.;3AF, ,:a3hin:5ton 25, D. ~- l Inc l : HE.ADQU AR'.IERS, FAR EAST AIR FORCES, TO: Comma nding General, Fifth Air Force, J\PO 710 1 . For"'farded for cocpliance ~i tb request con i.:1ed i n ~as ic com- :Junic:::t 'tion.