21st Bomber Command Tactical Mission Report 177etc, Ocr

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! U Q ! ! . ! H

HE.\DQP'ARTERSXXI BCNBER CCJ\WANl)

""0 2)4

TACTIC..u. MISS! ON REPORT

313th Barlbardment UingField Ordors No. 49; 51; 53. 55.

57 , 58, 60 & 61

x:a Bombor C(I!m!ll'!dMissions No. 173; 175: 171;

119. 180, 182,184 & 185

Targe t s : Niigat.! .• Maizuru. Tsuruga. P'ukuoka. Fushlki , Nanae an dShimonoselcl S t r a l t s ~ e a s

13 . 16. 18, 20. 22.24 . 26. aDd 2 7 " ' " 1945

Table t:1t ContentsPase No.

Annex .\. .. Operatiotl3 • .. . . . .. • • • • • • • • • • • •

Part I .. Uavigatioa ' I ' r ~ c kC l J . a r t s . • • • •

Part I I .. Mining • • • • • • • • • • • • • • • • ••Tac t ica l Narra t ive • • • • • • • • • • • • • • • • • 1

111:>-14

sec t ion il.-Mining Resul t s 0J:lIl Co4eDesignat ion d Mbes an dMine Operat ions. • • • • • • • 14

SectiOI1 B-Cbl r t s Sbomng Mine L o c a t i o n . 25Par t I I I .. Radilr • • • • • .. • • • • • • • • • • • 41Part r i .. OJ.cnery'. • • • • • • • • • • • • • • • 41Part V .. Air-8ea nescua 16C111t109 TobIe • • • • • 43

• • • • • • • •

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:ieathEll' .Par t I .. KiS!'ion No. 17 3 • • • • ~ • •

Part I I .. Mission No. 115. • • • • • •

Par t I I I - Mission No, 17 7 • •

Part IV .. ~ s 9 i o nNo. 179 • •Par t V .. lUasioR No. 160 . . .

Part VI .. Mission No. 182.. • • • • • • • • • • • •

Par t V II .. Mission No. 18 4. . .

Par t VIII .. Mission No. 185 • •

Annez B ..

• • • •• • • • • • • • •nIl6X C .. Conmunioations

Par t I .. Radio • • • • • • .. .

· . ...

. .............••

In t e l l i gence ..Par t I .. Enem;y Air Opposi Ho'l l .Par t I I .. EneJqf Ant ia i r c ra f t

.Anne:E D ..

Annex E .. Con.sol1dated S t a t i s t i c a l 9 ! ! ~ r i e s• • • • • • 91

AnnexF Fie ld Orders am Direc t ives . • • • • • • ..Par t I - 313th Bombardment WLng Fie ld o t d e n ..Par t I I - XXI Bomber Coomand .Direc t ives . !&ro

Memos and Plannina .Annax • • . . . . . . . ..

128

129

178

.lnne:z G .. Dist r ibut ion . ............ • • • 193



I : : : 1 1 1 1 1 : 1111 : )1 : : : I I : I :

I S E C R E T I

By Auth, of the C, G.XI I Bomber COlIIIfIe.nd

27 ll::,y 4.5 I D 1=

Dato In i t 1a l a: I I : I : : I I : I : : : I I I I : : : II I I

HE...I>QUJJ\TERSXXI aC.iBER CCr.

.. Y...NDAPO 2 3 '

SUBJECT I Report o f Wining Operat ions , 13 , 16 , 16, 20, 22. 2 ' , 26 ,an d 21 llay 19 '5 .

TO: C o m m a n d i ~General , T'fl '3ntieth Air Force, ' uh tnKt0n 25, D.C.

I , IDSlIfIEIC;'TION OF ~ I S S I m r s :

a. On th e bas i s of XX I Bonlber Coomand d i r ec t i ve s da ted 23

JtLnuary and 11 :lo.arch 1945, the 3l3 th Ba!lbardl:tent :!ind cont inued a i n e -le,ying operat ions agains; s t r a t e g i c 'fl'atonrays i n the Japanese hOlll.eland.

b . Miss ion assigntlOnts by the 3l3 th Bombo.rdment Win& Va. tbe~ t h.Bomb:u-gmont Group were a.s folloW5!

Bomber CClIlIllandH i n i o n Humber

17 317517 71 7 .180182184185

313th " ingP ie ld Order

4.5153555758

6061

Date ofFie ld Order

12 l.ie.y14 May17 )lay19 ),lay21 llay23 lh.y25 }lay25 !Jay

1!ln1ng lUI'810l1Number

10111213H

151617

o. Targe t s Spec i f i e d :

(1) PrimlU'y AreaS:

( a ) The Weste ." Approach!-<.O

th e ShimoOQsekl S t r a i t s !K1.n i l l e ld 1l1ko. Mining Missions No 10 . 11. 13. -1.•• IS . And 16 . - TheInain ohannels are used by the enemy through Hizush1ma S uid o, b et we enFu tao i Shima an d Aino Shima and between Shi ra Shima an d Myoken Sak1.Th e llJ1chorage a r ea eas t o f Mutsure Shima was o.1so inclUded.

(b ) TM E a st er n i .w r oa ch to th e Shimono5eki St.ra.i ta IUinofie1d L o u . Mining Missions No. 10. 12 . 13 , 141 16 . an d 17. - Th en a i n channe l s are used by the enemy through th e wes te rn appvoach t oSu o Nada, 1 bear ing approximately 12 5 degrees t r uo from He Saki an d thiso the r 160 degrees t r u e , Th e anchorage ares.s d i r e c t l y e u t o f He Sakiand no r th an d e a s t of MOji were a l so inclUded,

( c ) N i i g a t a ; Minef ie ld Uncle . Mining Mil l i ons No.10 And IS , - This i s th e a rea w ith in th e harbor l i m i t s of Ni iga t a Ko,~ t h th e mgin m i n e f i e l d de ns i t y to be i n th e channe l l e ad ing betwoenth o breakwate rs f r an du e nor th . Th e Wa te rf ro nt a ro a between . h a r v e sI , 2, o.nd 3 was a lso inc luded .

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(d) Mphuru! l U M ( 1 d d Z e b u , Hininl[ Missions . No.11 Qnd 13 . _ The entro..nces to Ha!suru and &&iyo.&u throlj.gh.lrilya.&U Wen,

with th e =nin h s n v i s s t mine c o n o e n t r ~ t i o n ato be betweon »usoga. MenD. ~ dBnkuehi Mh:lki ~ D dbotWOOD (uro Snki :"nd fumo..

(8 ) TayrugQ! Minefie ld ZgbrA. Hinio l Mission No.lE:. - The en t rance to Tsurugo. through Tsuruga. :hu1, with the 1lI1Lin minef i e l d dens i ty to be betwsen Ko Saki Dond Oka So.ki.

( f ) FulQ!9kg.1 Y10tlf1g1d Chor l i e , m n i o r l l h s i o n 'No. 16 and 17. - The entra.noe to FukuokEl through Fulruolca "'o.n, withth o hOElviest mine ooncentra.t ions to be betv,oeD Genko.i Shima. and ShigaShima. an d addi t iona l mines to be 10.id e a s t of N o k o n o ~ S h i m a .io Hakllta Ko.

(g ) Koratsu; HinoC1!21d Chor l i e . 111010'- MissionUn Hi, - The ont r: l.nCe to K ar ats u t hro ug h lt ar at au Wan. with the maint l inc f ie1d d(losi ty to be botlwoD. Kr.shiY,::. Shima. nnd H!m(l Shima..

(b ) F y s h i k i ; jf1neCleld l b o , lUning t ' i u i o " ' Ho.15 ood 16, _ ThO ontra-nce to Fuahile!. with th o h ellv ie st mine concent l ' t l . t ion to be l lcross th e mouth of Koyo.be K awa b e t _ e n Rokudojl nodFushilei ,

( i ) Ng.nn,,: Minefie ld Np.o, tHniD!!' Mtssion No 15 .Tho en t rance to Nan:l.o through Ko Ouchi a.nd tlo.no.o lV-an, with the heav i e s tOoncGntration to be ElOrOSS th e shipping h n o o:s't..1bl1shed by ll.Gria.lrGconna.1Bsa.nce.

(2) Seoondary kreaa l

( a ) ;"ny area. with in tJ1e Inland Sea. of Japan wa.espec i f i ed fo r a l l mining miss ions .

(b ) For " ' ining lUss ioM No. 10 and 15, any area. . ,nthin Tokye B3.Y was spec i f i ed .

( c ) For U i n i n t Missions No. 13 an d 15. and any ~ ~ ~.. ,nthin Ise l1o.n WllS l i s t e d •

2. STR.:..TEGY AND PLQNS CF OPERhT IONS:

fl. Strp, tegy!

(1 ) Mining ~ i s s i o n sNo, 1 th rough 9 e s t a b l i s h e d minof ie ldafl t Shlmonoseki S t r a i t s an d th e In lan d Sea a . r e ~ s .These miss ions werecouposed of 2 ""ing e f f o r t s p lus El number of s m al le r m is si on s tha , t usod20 t o 30 o.ir:.:·a .ft, ;. :study o f tho r e s u l t s ob'':llined.by f u l l 'Hog a.ndby Sl:Ialler for-cos indiCated t h a t th e l eng th of c lo su re obta ined withl ~ r g o re f f o r t s was not i n p ro p or ti on a t o.oy spec i f i c p o r t . Therefore ,i t was concluded t h a t to obta.in c lo su re of 0. pa . r t i cu la r p o r t o r chann ol , f r eq ue nt re -min ing was pre fe r r ed over l ~ g e - s c o . l ee f f o r t s c u r r i e do u t once or t1rice a month.

(2 ) C a r e f u l s tud i e s ."ere made of sh ip t ro . ff ic and of thop r e p a r a t i o n of minGS, t ak i ng in to account tho much grea t e r des i ro .b1 l1 ty

or s ink ing l a rge r sh ip s , an d th e n e c e s s i t y o f d of ea ti ng enemy Countermo::.sures, in po . r t i cu l a r the enemy l iark 3 sweop which was be l i eved t o boi n posse s s ion of th e enGmy i n quan t i t y. This le d to th e conc lus iont h a t mines should be prepared t o n u l l i f y th e enemy Mark 3 sweep, Q.f1d

f o r s e l e c t i v e s i nk ing of s hip pin g in accordance with s tu die s o f t h e i rt r a f f i c . Becaus6 of the ex i s t ence o f enemy sue ide sweeping. i t Was

_2_



or pa r t i ou ln r importanco to prevent the f i r in/; of any m.inos on smallsh ipa or beata and. therefore . to avoid athwartshlp f i r i n ~and thous o of mines o f e xc es siv e sens i t i v i ty. J,. prel1JD.innry e,t1lllate of th eaccuraCy derived from th e lUng's o:!t1mate of the pO::litions of a in in , ;s t i cks . . togother with the conddc rn t i on or cna::lY .."i:9 t."u.rfic. 104t o th e conclusion t ha t th e numbor of ship pU::Iagc:oJ per \'JOok a t Shimo-noseki S t r a i t s and other t a rge ts oxceetlod by 4 or 5 t imee th e number

of mines per week which i t was pos:!iblo to place 1 ~ t ho ch an no ls e a ·t ab l i shod by tho enemy. I t WIlS therefo;."o conclude:!. thtl.t a n(L!"rowto . rget width wus d,nirab1e in order t ha t maximum d?r\ar;e would be doneto each s hip i:line:l, s i n ~ e0. dolay of 0. few dClYs or ·.?laks in ',;he f l r i ~

of mines in the cha:ll'Iel could b" toloro.ted to obto.i::!. !I!....xl'nu:Jl mino of_fec t iveness . :L'h1.s conclusion was of pl'l.lllary 1 t l p o l " ; ; l : . r . ~ o'dr.c;) i t w uin d i re ct c o n t r Q d i ~ t i o nt o th e t heo ro t i ca l concept t h a t rnnxlcum dumag"could b e o bt o.i ne d i f every ship passing WQS mined, c v e ~ w ~ t hQ verysmall c.amag'3. This previous concept was t ruo only i f th'l number ofminoa avo.ilablo to sink: ship:! WllS c o n s i d e : · l \ . b l ~in excess of the weeklyship t r o f f i o .

(3 ) These conclusions were imp lemented by d i r ec t i ve s t oth e \71ng which oro in I I plo.nning n.nnex ( i n Pa.rt I I . It.nnl!lx F of t h i ar epo r t ) to thl!l mine d i r ec t ive . On th e b a s h o f t h i s annex, th e 1l1neUodlfico.tion Unit propo.rGd reCOllllD.ondc.tlons given in Zoctions B and Cof ;.nnex F which wore followed by the 313th :1ing in t ho i r mine ordert o th e l i ine .';'ssembly Dopot. The orgino.l mino d i r ec t i ve i s given i nSect ion 0 of It.nnex F and or ig ina l ly contempleted t igh ten ing th e b lock ·o.de o f the Kobo-Osc.ka. rog ion . o.s wall as i n i t i a t i n g tho blocko,de ofthe North Honshu por t s c.nd m o . i n t ~ l n i n gth o S h ~ o n o s e k iS t r a i t s b l ock -t1.de. 1... ca re fu l stUdy of the e ne oy 'a s hi pp in g r ea ct io n l ed to tho con-clu510D t ha t the or ig ina l mining in th o Inland SOQ. l lrea ho.d g r e a t l yreduced t he a hi pp in g t h e r e Dnd thc.t the enomy lYc.s d 1 T e r t l ~shippint ;

t o North Honshu por t s . The origino. l mining d i r ec t ive was thereforec.odif ied in succeeding d i r ec t ives a. 5 tho enomy'l5 d ive r s ion cont inuod••These modifico.tions are given in Sec t ions E: to J of .r..n.ex r.

b . Shipp inc Si tua t ioD!

(1 ) hn ana ly s i s of t ro . t f ic a s d et er mi ne d by reconnaissancea f t e r recent mining opora t ions ind icn ted t h a t fol lowing temporaryolosure of mined pc.r ts , the Japanose resumod tro.f 'fic a f t o r 0. b r i e fa t tempt a t ~ ~ o p i n g ~an d absorbed lossos of ships mined in order t oobto.in badly neadoc. supp l i e s . This i s espec i a l l y nece5lary t o thelllbocause of the food shortages caused by tho burning of urban o.reaS.

,;. s tudy of tho photos indiCated t h a t th e width of shipping Cho.nnollli s no t grea t e r than 2000 f e e t . an d t h a t s h i p ~ i n ga.ttempted to n o . v i ~

gate in th e cen t e r 0: these channels , each s hi p f ol lo wi ng in the WIlkoof tho precedtng s h ~ p . Only mines t ha t f a l l in or near these channelswould be e ff ec t ive in mining sh ips .

(2) The most important s tr at eg iC a re a fo r mine a t t a c kcontinued to be S h j ~ o n o s e k iS t r a i t s , I t is be l i eved t h a t th e 108S o f~ O s a : ~ 3pe r month in t h i s area. i s no t 8 u f f i c i e n t to stop enemy shipt r a f f i c , which was ns h\gh as 200 ship passnges p e r w o ~ kdurin, ; pea.kpe r iods . In c.:-der to obta in l o s se s h i ! h onough to p re ve nt th e us o

of tho S t r a i t s by thee n e ~ y .

th en ~ b e r

o f ship:! minod~ u 5 t

be nppro_Cillbly g!'811ter than a t present . I t W0.8 e s tm a . t e t.'l.at co:npleto Clo8urewould only be a t t a ined i f ~ t IOast 60 m i n e ~pOl" week wore l a i d in th echa.nnola.

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(3 ) The enemy i s making c o n s i d e r ~ b l ep r e p ~ r ~ t l o n efo rd i v o r t i ~shippin& to northern Honshu por t s . ~ n dsuch diTorsion may hAVOa l ready a t4 r t ed . The mining of th e po r t s f r oe N i i ~ t nto FukuoknWQA neCessary to disorgani&o these divers ions , an d in p a r t i c u l a r , topreTent r e l i o f of the burned c i t i e s throu&h tho so po r t s by the imp o rt :l .t io n o f food, Vlhich 111 now one of the nos t c r i t i c a l i tems i nJlqIl ln. This i s ospec ia l ly t rue of food coming through tho po r t s of'

~ l y ~ t u .Maituru. Tsuruga. Fush ik i . Gnd Niiga.ta. which can supply th eurban areas of Nagoya. Kobe, O l l a k ~ ,Kyoto. nnd Tokyo.

c . l l in in , Ob 10QtiyOi!! I

(1 ) The objoc t ive of l ! in ing Missions No. 10 through. 17w ~ sto r e - e s t a b l i s h and m a i n h i n complete c losuro of Sh1monoseki Stro.1Ut o 0.11 vesse l s of 1000 tons or over by re-mining ~ t f requent i n t e r n h .and fu rth er , to e s t ~ b l i s hc losure ~ t th e d ivers ionary po r t s o f N iigatB .Fushik i . Nanno, Tsuruga. Wia&uru, Fukuoka. and Karatau.

(2 ) Two now c ine f i r i n g mechJJ11sms, the preuUT'O aecha

nism a.nd th e subsoniC mecho.n1sc. both of which a.re considered praCt i c a l l y u n s _ e p ~ b l e .wore to be used in these opera t ions t o assureo i tho r c losure o r i n e f f ec t i v e swooping by tho enemy an d a consequonthigh 3hlpping oasua l ty r l l t e .

d. Dota l l s of Plann ing ;

(1 ) Operat ionnl P b m i n g j

(0.) Tho g o n G r ~ lplann ing f e r th ia opero.t1en wass imi l a r t o the plMl1ing fo r prev ious mine-laying miss ions as ou t l i nedin th e r epo r t s of h in ing Missions No. 1 th rough No, 9 with one excep

t i o n . Because of th e sUoStained nature of tho opera t ions an d th e f i l e ttha.t they were be ing conducted by one Group, tho 9 th Bombardment Group.0. l ~ r ~ po r t i on of th e p lan nin g was Carr ied out on B Group l e v e l . ThisnlUie i t poss ib l e t o u t l h e i n the plann ing of each m h s i o n th e ex per i_ence gained in 1.cI:Iodiately preced ing m i u l o n l l .

(b ) The s e l e c t i o n of a pp ro aC he s a nd minelay ingruns 'WUs in f luenced mainly by ra da r re fe re nc e po in t s an d th e mostf av o rab l e ax is o f a t t ~ c k st o p l a ~ e0. maximum n ~ u b e rof mines i n thechanne ls . ; "n t ia i rc ro . f t Concent ra t ions were lI,lso t aken in to coneidera .t i o n , b u t in s e v e r a l caSGa i t WQ.S necossa ry to pene t r a t e hell .vlly prot o c tod areal5 in order to p l a c e tho minos whor0 thoy could be most

affoO- the . Dive r s i t y i n lUee o f atte.ck WOoS employed wherover p o u i b l e .

(c ) In g en era l. 0.1t i tudes o f a.ttack wore kept as10;1 as poss ib l e cons l a t e n t with onGrilY defonsos llr.d torr.11n. In thomiss ions a g a i n s t tho nor thern H o n s h ~p o r t s . where i t ~ s nocos ,a ry t ogo t o i n te r m ed i at e o . lt lt u do s t o crOf;5 mOl1nto.in r a n ~ s .a l t i t u d e s of8000 f o e t were used s ince fue l consumption did n ot perm it d es cen t t olcmor 0.1 t l t u d e in vicw of th e cli:nb t h a t would haTe been necessa ryf o r th e r e t u r n t r i p .

(d ) ;.11 m i n e ~ l o . y i n grues 11erG plar:ned Ilnd b r i e f edas rad ar ru ns . Rado.r counte r m e o . s u ~ · i J SweT" t o be U8e;1 il l t};.e heaVi lydefondod aroas , Beco.use of th e f o . 7 c r n b l ~pho.to of tho moon, a l l crows

v ~ r ob r io fod i n v i sua l methods of m i ~ o - l a y i n gi n the ~ v e n tt h a t t h e i rrc.dClJ' wo.a i nope ra t i ve .



~ J"-Il B. !'-1'.

(e ) In a l l of the"" m h , lo n l l, t ", ko .o rt a wore SOPa.nd a.lrcro.i 't proceeded independont ly to th o t l U " ~ t .Thoro "0.1 nonocelSalty for 0. complox schoduling system in view of the amnII numbersof a.lrcro.! ' t p l l r t l c l p a t i n g .

( r ) The t a c t l o a , l plnn f o r t hoso o p e r a t i o n s , 0.11 ofwhich wore flown by th o 9th Group, wa.s 0.8 followSI

l . On 13 Mo.y, 12 nireraf t wore to takO orfl lt laaOK. 3 t o mino tho Shi,monoaolci ' foat -.rolL o:t o.n a . l t i tudo o f 6000f o o t , S t o mino tho Shimonoselcl Eal l t areQ ll t 7000 f e o t , aM . 4 t omino th o N11go.to. arOll a t 8000 foot .

l . On 16 Hoy. 30 o. irornt t l'l'Ol"O t o taJce o ffo.t 18001, 24 to mine the Shimonoaelcl \Vest lLroQ. :>.t an a . l t i tude of 6500t o o t and 6 t o mino tho l!o.izuru Q J ' Cn a t 7000 f o o t .

~ . On 18 "ny, 34 a i r o r c l ' t were t o talce o f fa.t 18001, 22 to m1ne the ShimonolSoki Eo.at o.roc. o.t nn al t i tu .de of 6000

f e e t and 12 to mine th e TlIuruga :u'Oa a t 6500 foot ,

j . On 20 tiny. 32 o.irc);:d't were to take: o fr:lot 1600K, 2J to C l i n ~the Shimonoseki ' !est :u'oa. o.t nn o.ltitude of 5500f c o t . 5 to mino tho Shimonoscki Eo.st CU'OQ. c.t IlJ\ ::Lltitudo of 6000 f e c t ,a.nd 4 to mine th o lIo.huru oroa. o.t 6500 f ed t .

&. On 22 lIllY, 32 o.ircrnft woro to tako o r t:lot leOOK, 16 to mino th o Shimonosoki !fost o.roa. a t nn a.l t i tudo of 5500foo t and 6500 foot o.nd 14 to mino. th e Shimonosoki E:loot orOa. nt 7500foe t .

§. On 24 liny, 31 a i r c r n f t were to take o tfa t 160OX, 10 to mine the Shtmonosoki '(;oat arOo. a.t o.n ll1t1tudo of 6500foo t , 11 t o mine tho N11go.ta. ll.l'e:l a t 6000 foot . and 10 to mine \hellQ.l10.0-E'ushiki o.roo.a o.t BOOO feot .

1. On 26 May, 30 o . i r c r ~ twere t o take offo.t IBOOJ. 2 to minG tho. Shimonosoki West nrca a t o.n o . l t 1 t u ~or 6500foo t . 7 to mine tho Shimonosoki East IU'Oll, o.t 6500 t oo t . 15 to minetho Fukuoko. and KlU'atsu Ooreo.s o.t 6000 feGt. and G to mine the Fu!hik1aroo. o.t BOOO f ee t .

~ . On 2 ~ Ho.y, 11 a i r c r a f t were to to.ko off

a t 1700K. 10 to mine th o Shlmonosokl East o.roo. o.t o.n o. l t i tude of 7500f o o t o.nd 1 to mine t h ~ Fukucka orCn o.t 6000 foo t •. .

(2) Dotnl l s of Attnck plonl

( a) A ll de ta i l s of tho at tack plan! for thoao miasiona lU'O given in 313th Wing Fiold Orders i n Annox F.

(3) D q tg rm in at io n o f Kine Lo;dl

(0.) On th o bOllis o f co.lculo.t1ona by tho '110.& a.ndGroup Pl igh t Engineers . i t was decided to cO-rry no bomb bu y to.nka tJD

tho so mhatons . a.nd to ca r ry 1 2 1 00 0. po un d I i l i n u to 0.11 por t s undora t t ack . or 6 2000 pou.1d oines to th o moro remoto p o r t . a.od 7 minest o tho closor t a rge t s .

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.U;.!l Jl j 1

(b ) AI experience WlI.S gCLlnod 1n c ru is e c on tr ol ont h ~ . omissions, i t wus found t h a t 7 2000 pound mine. could be carr iodas 00811y eLI 6 to a l l por ts because of the more filTorable load d i st r i bu t ion . This loading wo.8 therefore usod 1n Wining Uil. lon No. 15~ subsoquent missions.

(e ) Wine loading fO T OQch c l r c r a£ t was . pac i f i edindiVidual ly 1n the nnnexes to th o f i e ld ordors for tho mi.,lonl.F or p ur po so s o f s e c u r i t y nn d 0 0 . 8 0 of hand l ing , n l l minos won i d e n .t i f l e d Q. 8 to prcpl l ro . t lon by 0. codo deslgnCLtlon 0.1 l o t f o r t h 1n tho313th Wing ructionl SOP No. 15-8 (included 1n XXI Bombor C ~ Q n d

Ta.ctioo.l l 5 i u i o n Report fo r i.l1ss1on Nl1lIIber 67 , :.IlnlJ\l; lU • • lon N o . 1 . )

(d ) Tho mino preparation for these operations wnsvary 010881y soheduled beco.uso of the la to C'.rrivcU ODd unloQding or'tho supply ships. with the r e s u l t t h a t in very fOlt' co.aos woro mlnel8 Q#t\ilo.blo more than 1 or 2 d:lys beforo oach min ion . Tho schedule fo r minoPropo.ro.tion . a s cade out in accordance with thel o r l ~ i n a ldirec t ivofo r tho opero.t1ons so u to hOovo minos with dcsirablo tar&O't widthso . ~ i n s t'tho d i s t r ibu t ion of enemy shipping oxpocteld In oo.ch por t ,

e o n s l d e r l ~depth o f water, e t c . , avo.l1o.blo fo r oOocb oporOotion. ~ sthe 1:1i5810n progreaaod. in te l l igonce on eDeoy reo.ctlons mOod. i t necossc:ry fo r th e XXI BClIIIber Command to Change h.rg<lt pr ior i t1o l l , so tbo.t i n

severa l CQses c ines W3re planted \"1ith excess1V'o tOorget widths I lgainattho shipping expec'ted beco.use thoy wero. the only mines aTQ.llOoblo. Ingc:noru. howovor. 0. to.rgot width of 100 f ee t Vl'o.lI presented to thec . v o r O o ~ oship by the mine d i s t r ibu t ion plnntod in cOoch f i e l d .

(e ) Detai ls of hc.ndl1ng o.nd ]otlding of minea ino. i rc raf t were Q.ccording to To.cticol SOP No. 15-8 .

(4) Uining Ins t ruc t ion . ;

(1\) ••11 mines were to be 1o.id by 1 of th o 3 fol low- .inl$ rc.dt'lr !:le.thod!: ( l ) By forwClXd d e n t }"('>.ngo to tho ndOor n1;.ming pol .nta ,(2 ) By back s l a n t range t c th e rOodar Oo1ming po in t s . and (3) t imedrUD-out to the ro.dc.r o.1ming point ll . In th o evont of r o . d ~f a i l u r e .bOl:ilbexdier pi lo tage and t imed run on dond r e c k o n i n ~wore to be usedfo r p l an t ing minos.

(b )o r f thc runway eas t ofi n areas 30 mile.s awaymi58ions.

J e t t 1 s o n i ~areaS ware dosi£no.tod immediatelyTinian. en routo to th o JOopQ.neso homola.nd. a.m.from a l l i s lands en rou to , 0.& i n prov1ou. m i n 1 ~

( c ) The importance o f o.ccurnCy in p l o t t i n g 11.100posi t ion.s was s t r e s . o d in 0.11 br io f ings . 1 i r c r o t t were f i t t e d withra.dar .scopo camera.s to record tho po.si t ion of mino r e l e a . s . Dota. i l .of ro.do.r 8 0 0 p e p h o t o ~ r : l p h ywore speoi f ied in tho f i e l d ordors.

(5) Npignt ioDql PIOooing! For de ta i l s of rou te s . mo.-nouvar.s o.t tor a.ttack an d other Informo.tion on navigat ion p l a n n i ~ .se etra.ok chOorts in nnnox At P a r t I t an4 Annex F r o r 313th W i ~Pie ldFio ld Ordl3r1.

(6) R040r Plnoningl n. I n d l c ~ t e d ,all mino-lo.yin£ run .\ ~ r oplanned and br i e fed as r ada r runs.

("7) Bgdn[ CouDtgr ~ I o Q C j u r o s ;No Rm: s u r c h WQS t o beconductod on ' the miss ions , bu t i t WQ S plannod to disponse ' r ope(window) whenever a i r c r a f t deemed i t necessary.



(8) 4 i r : § e , Reaclril!l PI'MiDCI For deta . ih of d r - s e a .roacuo f a c i l i t i e s , se a ..nnex A, Pa.rt V.

3. EXECUTION OF tHE MISSIONS,

' . Take_off I To,ke-off'1I were a.ccOlllpl1l1hed under favorablocomi t ions as fol lows:

l l in ln t ... i r c r a f t P i r s t LaatlUssiQo AirborM Toke-Ofe Tplsg_orr

10 " I30800Z 130904Z11 '0 160800Z; 160840Z

",. 180800Z 180841Z

" ' 0 2008002; 200927Z1< 32 220801Z 220040ZIS ' 0 U080 l ! 240945Z16 30 260800Z 26oe35Z17 11 2707003 2707HZ

b. RoutH Out:

(1 ) Thera wero no dovillt ions io routes out fo r l I in in tl i iss iona No. 1O, ", 13, 16, a.nd 17 .

(2 ) On l l ining Minion No. 11, 2 c. ircrot t ha.d inopotllt ivero.do.r s o h I1nd droppod mines by doo.e reckoning in th e Inlnnd Sea.•.i..nother plo.na could not re lease th o mines a t tho t a rge t , bu t f ino. l ly10.1 voed i t s load in tho Inland Son.

(3) On Wining " i s s i o o No. 14 , 2 a i r c r o f t hnd i n o ~ r a . .

t h o Loro.n s e t s an d thrue al rcrcf ' t waro blO1lTl orf from 2:0 to 35 tailos

duo t o bighor winds thnn hell. been fo reces t . Bod weather conditionSprevented c e l e s t i n l f i xes f roo be Ing taken.

(4) On It.ining Mission No. IS, 2 a l r c r a . t t with 1nopero.t i v e ro.dar se t s d r o ~ p e dmines in th o Inla.nd SOa. and ou t . id e NagoyaBo.y, r e spec t i ve ly.

C. Oyer To.ue ts I

(1) Primnry,;"rensl

(II.) Of the 209 a i r c r a f t o.irborne On these missione,1 90 m in ed pr1rna.ry o.rens. it. t o t a l o f 1284 mines wo.s plo.nted, of which15 1 wore 1000-pound nnd 1133 'I"ItIre roOO-pound s h o s . Tho llline casasworo f i t t e d with 0. vo.riety oC p ro s su re , s ub -s on ic , m ~ n e t i c ,an d n c o ~ s t i c

a ino -C i r ing mecho.nims to provent eCfectivG cnemy oounter meo.surClis.: . d et o. ll cd breakdown oC mines droppod in ea.ch a ino f i o l d i s includedin Po.rt II, S e c t i o ~A. In ~ n o T ~ 1 1unswoopQblo tYlOS were planted i n

tho Sh1I:lonoseki Stro.1ts o.reo.s.

(b ) Times of llline reloo.sos on the Vo.r10115 m1aa1onaby minof ie lds were o.s fo l lowsl

lUsaionNumber MlogC101d

10 lUkeLo. .Uncle

F i n t BfJlen§§

131520Z131524Z131541Z

_7_

LQlit Relap.se

131545Z131&16Zl31629Z



Iol1l11iooNumb"

11

12

15

16

17

1], .l1 J! Ii :r.

Minefie ld F i r a t R!tlgB.1lIl L U t Re lQn .

""" 161548Z l61726ZZebra. 16161U 161614Z

Low 181552Z 1e1668%Zebra. 181606Z 1B1709Z

"."" 20154SZ 2017llZLow 201602Z 201636ZZebra. 2 0 l 6 o e ~ 201626Z

""" 221607% 221654ZLow 221602Z 2217llZ

Uncle 241544.Z 241720ZNon 24161M 241759ZMike 2416043 241653Z

Non 261602?: 261625ZLo,", 261532Z

261625ZCho.rI1e 261644Z 261730Zlnke 261643Z 261706Z

Low 271458Z 271524ZCho.rl1c 271516Z 271526Z

(c ) ~ l t l t u d e so f o.tto.ck r ~ n g c dfroo 5300 to 8400f e a t :lnd th e cnl1brntod I n d i c ~ t e do.1r apoe: i a t mine ro1ea.se o.vero.god23 0 c U o s per hour.

(2) Secondnry ; . r0gSl P ou r Q ,i rc ro .f t d ro pp ed t h e i r f u l l

100..ds of mines in sccondary Iu"oo.s, 3 in tho Inland Sea und 1 in Nagoya.Boy. Two IXIditlono.l Ooircrnf't p1Oontod sb1@;lo o inos due to releOo8l' sya ..t e e Qnlfunct ion on t h e i r ini t io .1 run In th e In10.nd Sea. aroa.1 b r Ing i ngt o 29 2000-pound mines tho totOol pla.ntod in secondary lU"eas. DetOoI1ed10cntions of these mines are plo t tod on ch3.rts in ; 'nnex J.., Pnr t I I .

(3) Jet t iQoDodt : . tetOo1 of 11 2 mInes, 13 1000.poundo.nd 99 2000-pound s h o , W0.6 droppod In j e t t i s o n i n g areas speoi f iedin f i e l d o rders . D eta i led loca t ions o f those minos ero p1ot tod ontho char t s in ••nnex " I P a r t I I .

d. Route Brlckl There wore no 5ubstl l.ntlo.1 devio.t ioDS frolll

br i e f ed r ou t e s on those missions with th e except ion o f 13 a i r c r a f twhich 10.ndod nt Iwo Jimll. nnd 2 a t Oklno.wo..

O . LAndingst ; ' l rc rc . f t of t he missions 1o.nded 0. 5 follow,S1

l ! i s s ionNUli!bElt

101112131 .151617

F I r a t Logdine

132155Z162125Z1822102202146Z222149Z2421452262204Z272128Z

...

132353Z1700162

190101Z2023062222356Z250052Z270053&272226Z



.LH.R. I i 1

r . Lou • • I Five d r o u t t ",ere l o s t on theslI minion . dueto the followin& Cmu"sl

( l ) Uochanical an d aoc iden t . :5.

(2 ) En'lII¥ I . n t i a i r c r o f t •. 2.

~ . O pe T I t i ops Suq;mary I

(1 ) NniC,UODI ( S u Annex A., P a r t I , fo r t r aok c h l . r h ) .The navlljatlon on th o • • missions was about as br iefed . Deviationawere minor an d woll with in the I1mltlS of .. c c u r ~ t enaviga.tlon. A hl!jhpercentage of radar ,.t, was operative over the target areas •. SO tha tnavigation general ly WU8 .a t is factory, Loran Waa effec t ive .

(2 ) 11101n(l : (See Annex A. P a r t I I , fo r d e b U s )

(3 ) F l i g h t EnC' inur iN'" (For f u e l consumption da ta 80 0Consolidated S t a t i s t i c a l Summar!" in ~ n D ' %E. )

Ca) N arra t iv e of th e M l u i o n a p i Flownl l.!ui.mWrtrange procedurswer. used fo r a l l cru ' ing operations.

(b ) .lt2ad..l Th . mine lOad per aJ.rorai ' t averaged 12,551pounds and the fuel load consisted of f u l l wing and center sec t iontanks . To.ke-orf g r a n weight averaged 133,619 pounds per a i r c r a f t .

(c ) Fuel Bo.s§£V9l Fuel reserves were IJllple, aveng ing752 gallons remaining on landing.

( t ) !&4I,[t (See Annex A, P ar t I I I , . for deta i led repor t ) .or the 190 .. 1rc ra f t mining primary .. reas. 179 re le .. sed mines by rada.r,

(5)There was 11 t t l e

Gunneryt- (See Annex .\ , Part IV, to r deta i led repor t ) .gunnery necessary on these night c h s i o n s .

(6) Air_Su Rescue t On. l H u i o n No. 160 .. a 8-29 c r u b e din to th& sea 10 to 20 mUes off the Japanese coas t Lfter 2 enginesand naVigation instruments ha d been she t out by enemy a n t i a i c r a t t .Eleven crew members bai led ou t and ~ were rescued by a submarine ina he::l.vy sea .

h. ' leather t (See Annex B. for weather I!IW1l11larles and char t s )

i . Cgmmunlcations;

(1) Radar Counter t leasuresl No RCU search was conducted,Rope was dispensed by individual a i r c r a f t ~ t h apparent ly geod r e su l t swhenever i t was deomed necessary fo r protec t ion from a n t i a i r c r a f t and

sea rch l igh t s .

(2) &4121 (See Annex C. P a r t I , t o r deta i l s> ' Therewere no incidents of jammicg or in ter ference .

j . Iq te l l lgenCt l

d e t a i l s ) .madill only

to . l1 ' ) •

(1) Enemv Air OppositiQnlOne hundred and one a i r c r a f t

10 at tacks .

(2) Enemy Ant ia i rc ra f t lIn genera l . f l ak was repor ted

- 9 -

(See Annex 0, Par t I , fo rsighted on these 8 missions

(See Annex D, P a r t I I . reI ' d eas meager to moderate an d i n .



accura te . Oi!peneing o f rope proved to be . f f e c t i v e .

(3 ) Minioc Results I (See Annex A, PlU't I I . fo r do te . l l i . )

.(a.) . I4 i no f fd d l 'J M _ (WOItor» AI!proq.Ch t o §biaOAOSOkJ"S t r a i t s ) , E x c e ll e n t m i n e. l ay i ng wus done i n thio f io ld . or tho 78so r t i e s Dado 5S plo.ced t ho i r mine. so ~ b o . ~a ~ a x 1 c u mnumber f e l l inth e channels .

(b ) ¥inpf iq ld Loxe • (Eastern approach to Sh1gongsQt1S t U l t s ) . Excel len t mine-Io.ying '""s done in ~ h i sf i e l d . with 32 ofthe 48 so r t l e s plo.cing t h e i r mines 5 0 tho.t c naximum numbor f e l l 1nth e channels .

(c) . I41pefleld Zijbral (Taurulpi Hni;uru Apd ¥ i y a ~ U

M U . S I . The aTlD.8 were e ffec t ive ly mined. with lSI of th e 21 so r t i e sbeing considered e ff eo t ive .

(d) M1nefi!2ld Nan! (Fu lh ik l and NaMO M U I ) 'Four out of the 11 so r t i e s i n t ~th e d i f f i o u l t Fushik i areo. were cons idered e ff ec t i ve o.nd th e other 7 placed minIM in e ff ec t ive waterdepths . '!Wo of the 4 s o r t l e s to Nanao were plllC.d o.t th e entrarl.cet o th e p o r t , and the other 2 were plo.ced i n e ff ec tiv e water depths.

( e ) 1 H n c f i t t d Uncle ' (N i ig s . h Area) , The mine.f i e l d in t h i s areo. woos p l an t ed approximately :1.9 br i e f ed . with 10 o fth e lS orews plo.cilll> t h e i r mines e f f e c t i v e l y 1n 11 r i e t ed po.s1t ions .

( t ) Minefield Char l i e , (Fu.k:uokQ an d IItQ1;IU ' ; ' r, , , , ) !or the 15 so r t i o s in to thoso t l I 'Oo.8, 14 orows pla.cod t h e i r mines in tobr i e f ed pos i t i ons .

-10-



,,-

•

OPERATI(J§

RJ,rt I .. N : 1 V l g ~ t i o nTrack cha r t

F.4"t I I - M1n1ng

Sec t i on A .. Mining Results

Sec t ion B .. cha r t a an d Rader seopePic ture . Sh : . l ng MineLooation.

por t I I I .. R6dnr

Par t lV-Gunnery

p e r t V .. Air-See. Reecue 1 8 c U i t i e .

~ S 5 i o n sNO' 173, 175, 177, 179. 180. 182, 184. 185

13. 15. 16, 20. 22. 24. 26 &: 27 Jey 1945

IL i J l I ! J l



APRIL 1945

" '0 'PART.I NAVIGATION TRACK CHART SECR£T

- - - - - + - - - - . . . l , l , . . . . . - j - ' - - - 2 0 ·

•

•

173-175MISSION NO 1 7 7 - 1 7 ~

DATE I - I MAy'4XXI BOMCOM.313fh. WING

II

' ~ C H I C H IJIMA I, I

I-+--25IIII

I

I- - - :rt- - 3 5 ·

____ K__ MiulOflNo.I73______j '7 5____ 177

- - ' _ _ Il • 179

II

TARGEt

•

•

fI-I/GUAM

, II

TAKEOFF LANCINGI, t Llilt lat. last.

NO.I73·13<)800l 130904! 13215&1 132353i!17!5.160eoO! t 6 0 8 2 7 l 1621215Z 170016Z

" 111- l&OeOOI: l e o e ~ l l C ' e l l i O t 190101 Z

Ola •. .

-MIS I N NO.179" ~

,

•

Q," "

, ,... - - - - - - ~ - - - . , . . -

....- - - ~ ' ", , , , , , ,

" ' . , ,

"

TRACK CHART XX I BOMBER COMMAND SECRET



APRIL 1945 ART NA A RSECP£T

- '>0'

LANDING

1st. Lost222149Z 2223561242145 l 25OO5212G2204Z 2 7 0 0 5 3 Z27212BZ 2722261

180-182MISSION NO I A 4 ~ 1 8 5..DATE •XXI BOMCOM .

I- - - - ~ - -..K E Y_ . _ _ • toMSSION-I"O

-------1 ~ : '•_ _ _ _ _ If"

IIIII

~ C H I C H I . . I I M AI\ I

I- - - + - -W JIMA I

III

II ~ · . - ·

I 'I

•

•

0 1 0 '

TAKEOFF

MiS5ion No. .,t Lo"1 8 0 " 2 2 0 8 0 ' Z 220840 ' l182 .. 24080lZ 2 4 0 9 4 5 1IR4 .. ? 6 0 8 0 0 1 2 6 0 8 3 5 Z185 .. 270700Z 270714l

l o ~221111Z241159ZZ6I130l2 1 ' 5 2 6 l

. .

TARGET

, ~ .

Minion No..80· ZZ'60ZZ• • 182" Z41540l.. 1 84 · 2 61 53 2Z

.. 185- 211458Z

. 0

, .

o · · . . . . : . . - L . : = " ' - : - - - - - > . " p I , r - - - - - \ - - - I; - I - - + - - - - - + - - - >~

5°

TRACf( CHART XX. BOMBER COMMAND



PART I I - MINING RESULTS.

SECI'ION A

1 . The fol lowing report i s submi t te d in aocorcSan¢e m tb WarDepartmEtot. , letter. AG 476.1 (2 0 O c t o ~ e r1943):

, a . The ohs.rts in t b i s sect ion show th e pos i t ions of a l lmines planted i n these opera t ions . Where the re su l t s of more tM n 1mining mission are indio9.ted on the :RIDe ch3rt , the mission number i sgiven by tho Roumn numbersl .::l.djacent to each s t r ing of mines. Th e p r e -para t ion o f i nd iv id ua l mines i n a s t r ing i s specif ied i n Annex 2 tothe r es p ec ti ve F i el d Orders fo r the m i ss io ns . r ef er en c ed to the runnwrber given by t h e A ra bi c n um er al adjacent t o the l ino o f mines , showon the m a r t s . Tho Field Order nlJlllbers fo r the '7tU"ious missions a reas fol lowsl

Mining Mission

xn

n In I I

XIVY3

Y3IXVII

Wing Fie ld Order

4951535557586061

Bam Com Mission No,

17317517 717918 1182184185

The legend on these char t s fu r the r i nd ic :l te s t he method

of p lo t t i ng so as to d i f f e r e n t i a t e bot'16en pos i t i ons e.3t31Hished byr a d a r scope photographs, by t i le nav ig . to r of the a i r c r a f t , or by theassumption th:1t th e cre'li planted t h e i r mines a s br ie fed (where noo the r data vas ava i l ab l e ) . Posi t iona es t ab l i shed by rad u- sc op ephotographs ara bel ieved 1.CCUI'1.te to 1/2 mile , and those by tbe navi ga to r t o 1 l'llile. Princ ipa l naviga t iona l a ids an d enOOlY defenses encountered arc given ! n o th e r S p e c i a l is t Reports i n t h i s TloUca l Mise ion Repor t .

b . The number'of 8-29 ~ 1 r c r a f tscheduled fo r these oper.::l.t ions ua e 212; of t he se , 20 9 were a i rborne and 194 vere e ffec t ive i n

p lan t ing t h e i r minos i n e i the r primary or second.lry mine f i e ld s . Th e

breakdown by miss ion 1 ~ a s fo llo wsl

M1niQR Mission AlC SchGduled A/C Airborno A/C Ef ' fec t ive

X 12 12 12XI 30 ~ 27

XII 34 34 ~XIII 32 30 30

XIV 32 32 ~Y3 31 30 27

XV! 30 30 29XVII - l l - l l --2.

Tota l 212 209 194

• Tho evaluated f igu res used i n ' this r epor t !Jere not nvai lab le to r

in c lus ion in the Consolidated s t a t i a t i c ~ l~ i e s .

.14-



c . A to t l1 6f 1284 mines of 011 types was p 1 ~ n t G di n theseopera t ions . Of these . 151 werC! l O O O ~ l b .s h e md. 1133 were 2000-1b.s i z e . The m in es c on ta in ed 3. v l r i e ty of f i r ing m e c h ~ n i s m sopor3 t ingon maGnetic, acous t ic , e u b ~ s o n i c .and p ro ss ur e i nf lu en o e f i e l d s . Shipcounts and doh,yed ermine '\'lora used on the mJ.gnetic types. ~ d s t o r i -l i z e r s se t ' i t 200-da,y nanin3.1 opor3t1ng time were anp10yed in !lolloinas . Th e d e h l l e d prep3.rotion of e3ch mine p h n t e d c::u\ be obb inedtrom the appended. char ts am. ,A;nnex 2 of the Fie ld Orders, tbrougb theuse o f the ·Code DesigD.:1tion fo r Mines m3. Mine Propv3. t ion (1 7 Iolay1945)1. A S1IlJUM-y of tb e mine t yp es p la nt ed i n lY.lch opi)r:ltion fo llQg's as Table I . and a s\Qll3.I'y of mines dropped i n other th.:m prim3rYt a r a e t i s given i n Table I I .

Tqb1e I t o Sect ion A

~ of Mines Pbn ted

MiniM .Mission X - Mark 2 6 ~ 1o r Mark 36.1 (1000# s h e )

Force I - Field Force I I '... F1elc\ ' o r co I I I - FioldAlike (Shinbnosold Lava (Shimonoseki)Unclo (NHjpta

S t r ~Are3.) S t r . A r e a ) ArS'l)Planted P13nted Planted

Schadulod In Tnt Scheduled In Tp;i Schoduled In Tg t

Tot31

Q21-Ae 9 9 7 7 8 8 24 24Q31-A8 5 5 13 13 10 10 ' 8 28Q4l-A8 4 4 10 10 5 4 19 18C31-B8 6 6 8 8 5 5 19 19O33-B8 4 4 4 4 4 4 12 12041-B8 8

.Jl lJ!18

E- E-. .J§ . .J§

Tota l l41nes -. .. .]6 J6 60 60 44 43 140 139Totol Sor t i e s

3 3 5 5 4 4 12 12

Mining M i a a t ~ nXI - M!lrk 2S (2000# s h a )

ForC13 I ,. F t eld Mik: e Force I I _ 1I'1eld Zebra Tota l(Shimonosek1 S t r Area) (M1zuru Area)

Planted Planted Planted.Qs&2. Scheduled In Targe t Scheduled In Target Sobedulad In TB!

Q21-A8 8 6 8 6Q31-A8 11 10 11 10Q41-A8 9 7 9 7XU-B8 22 18 22 18X31.B8 41 35 41 35X51-B8 23 19 23 19X71-ll8 11 8 11 8D l 1 ~ B 8 9 5 ?2 19 31 24D12-B8 6 4 10 8 16 12D13-B8 J . . J . . lQ L ..!5 ..RTota l Mines

144 11642 35

186151Toi3.l Sor t i e s

24 20 6 5 JO 25

-15

.2!Q.!!! . !



.§!QRE.I

M!nine: Mission XII - f , ~ r k25 (2000# s h e )

Force I - Fie ld Love Faroe II _ Field Zebra(Sbimonos9ki Str .Area) -l ' tSuruS3 Are:'!) Tot'l1

Planted Planted PlantCod. SCheduled In Target Scheduled In T3rgct ~ In Ta!-Q21-A8 8 7 8 7Q3l-AB 9 7 9 7Q!,l-A8 7 4 7 4n l -BB 3 l 3 ll ( 5 1 - ~ 7 7X'71-BB 3 2 3 2Vll-B8 38 "9 38 29MlI.. IB 3 2 9 9 12 11MlI--M8 2 2 8 8 10 10"'-3-08 2 2 8 8 10 10"'-3-1<8 1 1 8 8 9 9M31-B8 7 6 23 23 30 29

M31-08 5 4 10 10 15 14M31-KB 3 3 8 8 11 11

M31-MB 4 3 10 io 14 131<41-B8 16 13 16 131<41-r8 6 6 6 6Dll-B8 4 3 4 3Dl2-B8 2 2 2 2Dl3-B8 . 2 . 2 -- . 2 . 2To h l ),lines -

13'? 107 84 84 216 191Total Sort i os

22 18 12 12 :J4 30

! £ ~ ~ ! ! 8Mission XIII .. Mark 25 (2000# s h e )

:Force I - Fie ld J'ores II _ Field Force I I I - Fieldl41ko(Sbimonoseki Love(Shimonoseki Zebra (Ma2uruStr Area) s t r Area) ~ i ~ ~ e ~ . ~ ) = - " " " , , = = .Scbedul- Planted Scbedul- Plant"ad S ch a du l· P la n te dad In 'l'gt ad. 1n T{<t ad In Tat

Total .

P.s. !!.!.t.

Vll-BB 102 98Mll-IB"'-3-081<4'-B8 27

271<41-18 - 2 -.1.Tota l Mines

138 132Tot al S or ti es

23 22

30

30

5

24 132 1221 1 1 11 ! 1 1

14 14 41 41o - ld. B ...£! -13

24 28 28 196 184

4 4 4 32 3"

Mining Mission XIV - Mark 25 (2000# s i ze )

Force I i Field Force I I _ :Fiold Force III - FieldMike(Shimonoseki ldike(Shimonoseld Love(SbimonosekiStr Area) Str .\roa) s t r :.ran}

Schedul .. Planted Sohooul .. Planted Schedul- PIMtadcd In Tat ad !n Tg t ad I n TBt

nl-B8X31-B8"5'-B8x61oB8

Tota l

p ....§. ~

38 3247 44

37 351 1



Force I - Field Force I I - Field 70rce I I I - FieldMike{Shit lOnoseki Mike(Shimonoseki Love (Sbimonosekis t r Ares) St r Aroa) s t r Area) TotalSChedul_ P l ~ n t e dSChedul- P13ntod Schedul-- Planted P.

~ ed In Ts t ad I n Tat ad In'Tst ~ I.T...!.

X71-BB 12 11 4 i ,6 '5Mll-BB 5 3 7 6 6 ,8 '5Mll-IB 1 1 8 8 9 9>ll1...a 4 4 6 6 10 10lJ13-G6 8 8 8 8>ll3-KB ~ ~ J 8- '

48 \- -otal Mines

54 54 46 84 83 1')2 171To t s l Sort ies

9 8 9 8 14 14 Y 30

M in iM M is si on XY - Mark 25 (2000# s i ze )

Force I - Field Force II - Fie ld Force I I I - Fielduncle (NHg9.ta N3.n (NaMo and Hike (Sh1monosekiArea) Fushiki Area) Str Area) TotalSchedul- Planted Scbedul.- Planted Schedul- Planted P .

~ ad In Tst ad In TRt ad In Tgt l!!. I .T,

XU-BS 1 1 1 2 1X3l-BB 1 1 - 2 3 1)51-B8 1 1 1 2 1X71-BB 1 1 1 1ml-BB 2 2 01111-18 3 3 5 5 '8 8Mll-MB 3 3 4 4 7 7Ml3-GB 2 2 5 5 7 7Ml3-K8 3 2 4 4 7 6M31-OO 7 ~ 7 7 7 , ~ 2 r HM31-KB 7 7 6 9 23 18M31...a 6 5 7 6 7 6 20 17N41-1l8 29 22 17 15 1 1 47 38N41-18 4 2 7 5 11 7Dll-BB 9 7 9 7Dl2-BB 5 4 5 4

D13-B8 6 4 J ::l -d')I-B8 9 Cl ~ ETotal lJines 77 62 70 63 70 49 217 174Tota l Sort i es

11 9 10 9 10 7 31 25

Mining Mission XV I - Mark (2000# s i z e )

Force I - Field Nan Foroe I I - Fie ld Love(1Ushiki Are"!) (Sbimonoseld s t r Area)

Planted Planted~ Soheduled In Target Scheduled In Taraet

X31-BB 7 7)51-BB 7 7Vll-BB 7 7M31-BB . 4 4 7 7M31-OO 2 2

-17-

. a ! Q ! i ~ !



2&;Q!! . : [ !

-Force I - Fie ld Nan 10rce I I .. Fi e ld Love

(Fushiki Area (Sblmonoseki Str Area)Planted Planted

Code Scheduled In Target SChodulad In Target

JCI-M6 5 5 4 4N41-o8 7 7N41-18 9 8Dll-BB 5 5 8 8D12-BB 3 2 4 4Dl3-sB . 2 2 - l - lTotal Mines :l5 33 49 49Total Sort ies 5 5 7 7

Force I I I - Fie ld Force IV - FieldOu\rlie {Fukuoka ~ k e (Sb1monosekiArea) ~ r Area) TotalScbedul- Planted Scbedul_ Planted Planted

Cod. ed Ill. T d ed Ill. T ~ Scbeduled In Tar80"

n l - s 8 1 1 1 1X31-o8 19 -l9 2 2 28 28XSI-B8 9 9 1 1 17 17X71-a8 6 6 6 6VlI-08 7 7Mll-B6 2 2 2 210.1-16 3 3 3 3ml-M6 3 3 3 3Ml3-00 2 2 2 2Ml3-KS 3 3 3 3" 3 ' - 8 8 2 2 13 13"31-GB 3 3 1 1 6 6JC1-KS 1 1 1 1"31-M6 ,. 1 10 10N41-o8 7 7N41-r8 9 8Dll-08 26 26 2 2 41 41D12-BB 12 12 1 1 20 19Dl3-B6 11 11 1 1 -!J; ..!1Total Mines ~ 9 F 14 14 194Tota l Sart i es14 14 2 2 28 28

!!!,.nillB Mission XVI - Mark 26-1 or Mark 36-1 (1000# s h e )

1000# • • • • • •2000# • • • • • •

Tota l Mines • • •

Total Sor t ies • •

CO?l-AS 4Q31-A8 6Q.41-A8 2C31-o8 3 3C33-o8 2 2C41-B8

..1 ..1 --Tota l Mines 12 12 i2Tota l Sor t ies 1 1 1

~ .

Force I - Fie ldNan (FushiklArea)

Force I I I - Fie ldCharlie (Fukuolm!·\.raa)Schedul- Plantedad In Tat

ooo

' 0o

Tota lPlanted

Scheduled In Tar,get

4 06 02 03 32 2

..1 ..124 122 1

24 12196 194220 206. 3 0 29

-18

§ ! . Q ! L ~ !



l : ! I Q B ~ !

Mining Mission XVII - Mark 25 (2000# s ize)

Force I - Field Force I I - Fieldr..ove(Shimonoseld C!larl1e ( F u k u o ~ .

S tr A rea) ' Area) TotalSchedul- Planted Scbedul- Planted Planted

~ ad In Tgt "" In Tat Scheduled In Tartwt

XlI-B8 21 14 21 14X3l-BB 9 7 9 7lIS1-B8 7 5 4 4 11 9X7l-e8 3 2 1 1 4 3vn':'eB 7 5 7 5Mll-IB 1 1 1 1Ml3-08 1 1 1 1Ml3-K8 2 2 2 2MJI-B8 6 6 6 6"31-08 3 3 2 2 5 5"31-K8 2 2 2 2"31-M8 3 3 3 3N!l.1-I8 2 1 2 1Dll-BB 1 1 1 1D12-B8 1 1 1 1013-88 . .! 1 -- 1 · 1

55- "7 n 62otal Minas 70 7

To ta l S or ti es lO 8 1 1 11 9

1hm>arz o f Mining Misl!l1ons X through XVII

Total Sor t ies ' l 'otal MinesMk 26-1 or MIc ., _ k 25

36-1 (10006) (2000#)Total

Mission Plant " Plant" Plant Pla.ntNIlmber ~ InTgt Sched, In Tgt; SChad, In Te;t Schoo. In Tgt

X 12 12 140 139 140 13 9X I 30 25 186 151 186 151XII 34 30 216 191 216 191X I I I 32 30 196 184 196 18 4XI V 32 30 192 1n 1')2 InX' I 31 25 217 174 217 174X'I I 30 29 24 12 196 194 22 0 206X'lII - l l ....5 --- - - I i . .-J8. - I i . ~

212 190 164 151 1280 1133 1444 1284

Table I I to Section A

Summary of Mines other than t ho se P la nt ed in T9.rgct In mining MissionsX through XVII

No. Mfffes -mssicri"- lro.n-----WO. ... S b e - - ~ - - C o a : - a r M 1 : e 8- - """""Remarks

1 X 9 1000 QIII_A8 1620N 14534E Jet t isoned1 XI 14 2000 Q41_A8 3250N 13220E •2 • • • X31-B8 • • •2 • • • lIS1-BB • • •1 • • • X71-B8 • • •2 • 30 • Dll-B6 33J2ll 13215E Al terM. te rI d1 • • • Q4l-A8 • • •1 • • • "3 ' -B8 • • •

- 1 9 -

' § l Q R ~ ! . .



JlJL9JjJI

Ho. MinH M i n i o g Run No . ~

•••

•••

•

•••••••

•

•••

•••

•

•••

Remark«

Ale f s i led toTake oft

•

l e t t i ~ o n e d

•• (l.and

exploded)Jettisoned

••

•

•

••

•••

•

••••

•

•

•••

•

l ) l )2E Altern!lte P'ld14603iE Jettisoned

• •

14246014045E

1)2:15E Alternate 114• •

13954E13612613123613058E

•••

•

•

••

•

•

•••

•••

•

,

Coordln'ltell

3435N 13430E• •

1122N 14420E• •

3332 N•

2216N2SOJN

•

2548N - 14007'• •

3358N1545N

•

261lN2 ~ O N

3401N3402N

151930N 14606.• •

Clod,

JCjl-B8X7l-ooDll-B8D 1 2 ~ B 8

D13-88<l'll-AllD12-88X71-BB

Dll-BS

NOl-I8

Vll-B8

Dll-BBD12-88XU-BBX31-BB

XSl-OOQ;11.AllXlI-BBJ[JI-B6Q41_A6M)l-OO~ 1.. A8Q31-A6Q41-AllNOl-OOVll-BB"31-B6MJI-MB

NOl-B6<13'-A6

Q4l-AllV·H ..BS

Vll-B8O1I-B810.1.. 18NOI-B6vll-BBXS1-B8X71-B8V n .. BB

Ale blew-upon take orfX51-BB 3344N 13122E Jettisoned1<11-00 1543:JON 14606E •n l -B8 • • •X31-BB • • •151-88 • • •Ml1-B8 2157R 14250E •XlI-B8 • • •X31-BB • ~ •X71-B8 3206N 134476 •X31-88 3200N 13441E •W.l.B6 375414" lJOl45OE •M31-BB 3436N 1)6541: Ai tern.3.te Fld..M31-XB ' " W •

M31-MB • • •N41-B8 • • •N41-IB • • •

•

•••••

•

•

•

••

••••••••

••••••

•••

•••

•

••

•

•

••

•

••••••

,

•••••

2000

2000•

••

•

910

2••

14•

•••

•

•

•

••

•

•

•

•

•

•

6

•

•

•

30•

6271124

23••

22

1620••••

2626

7

15•2

21

11•

•

•••

•

••

•

•••••••••••••••••••

••

•

••••

•••

••••

•••

•

XI••••

XII

XIV••

XIII

1121122

11

32

21111

•

2

6

11111111111

1161111114

1221111411111122

.. 20 -



-21-

d . A l l minl!s used in t h h operat ion were obt1.1ned f ran Mine

Assembly Depot No , 4, TWen,

•

•

•

••

••

••

•

•

•

••

•••

•

••

•

•

•

•

••

••

Remark8

• 1444

Ale fa i l ed toT9,ke o f t

•

• • 1284-• • • ....l2Q

•

•

•

••

•

••

•

•

••

•

•

••

•

•

••

131J2}E Alternate Field141163 Jettisoned

• • •

•

•

•

••

•

•

••

•

••

•

••

•

Qg°rdinate§

33.34N 1]15,SE Alternate Field• • •

• •

150&< 14603E •• •

,

1553" 14606. •

1457N 14611}E Jettisoned• • •

•

3 W N2315N

•••

3355N l36l5E Jettisoned• • •

1526N 14623E1530N 1J,615E

• •

1526N '4616E •

"31-BBM31-G8M31-K8

"31-MllM31-KB"31-00

1<41-BBN41-I8"3'-BBM31.C8M31-K6M31-MB

1<41-88N41-IBD11-88D12-B8

Dl3-B6M31-BB1ol31-OO

"31-K6M11-BB

M31-B8Xll-B8X31-B6:l:51-B61<41-'6D12-B6Q21-ABQ21 .. AB

'l3'-ABQAI_ABxll-88Vll-B8Xll-B8X31-BBX51-BBJl71-BBN41-'BVl l ..B8Xll-B8

X31-BBX51-BB

•

••

•

••••••

•

••

•

••

••

••••

••••

•

•

•

•

•

•

••••

••

BALANCE

2000

2000

1000

Total Mines Scheduled

•

•

•

••

•

•

•

•

•

•

•

63

••

•••

•

•••

2

•

•

•

3••

7

•

33••

•

••

5

25

31

16

Total Mines P1'll1tod in PriInDry • , •Total Mines Not Planted in Primary

•

•••••••••

••••

•

•

•

••

••

•••

••

•

•••

•

•

•

•

XVI

•••••

XVII

Total

11211

11

l211

31

111

1311

TOo

312111

4111112121

11112

N O t M i n ~Mission Run No" Size .Q2!a

e . The Mark 25 Mod I , Mark 25 Moo 2, Md Mark 25 MM4 minesplanted in th is operation were equipped with 9-toot parachutes; a l l

otb3r mines had 6-toot par3chutes, Ninateen parachutes were seen to• t a i l by crew lllembers; 3 mines were observed to explode on imp9.ct f and

1 short s t a t i c cord was returned in an a i r c r a f t .



f . The ba3io t a c t i c s used i n t h i s operat ion wore the s ~ m o

as tho:;e previously employed in "lining Miuions No. I througb IX .

g; Casual t ies sU3tJ.ined in t ho se o pe ra ti on s i nc lu de 5 .'1irc r a r t l o s t , 2 of which were presUDed to hn'o been l o s t to eOOllW ac t ion .3 ai rora t ' t with m a j o r d.itlOse. an d 6 ' ) l r c r3 t t with minor d"\rDaga. PersOllllel casual t ios numbered 29 k i l l ed o r missing sn d 1 in jured .

h. The c r i t i que of mine-laying r e su l t s tha t fol lows i s b ~ 8 e d

upon the most accur ' l te data aV'lilable on the f ingl posi t ions Of a l lmines planted. Radar contiI"'lll3tion was used wherever poss ib le , but i ninstllncos i n uh1ch th o data of tho· oanbtlt crew f l y ing t he m is si on s conf l i c t e d · ~ i t hthe r ada r photogrtlphs, the two ware wciehtod cl refUl ly. Ingenera l , i f tho radar da ta snd combat cron d ~ t snerc i n c o n f l i c t , ther ada r photos wore used fo r dMennining a t lO'lst one point on th e minol ay in g t ra ck of too a i r c r a f t , an d tho d".lh of the canbot a1"t:l\1 fo r d etermining the ra leaso posi t ion with reference to th is p oin t.

(1) Minefield Mik£l ("Vest om approach to Shill'lOnosekiS t r a i t s ) - A ll of t ho m i ne -l ay in g ! p r t i e s to t h is f ie ld '\'Iere direc tedaga ins t narrow channels and enchor.qge a rea s being used by the on6rqyas detenninBl by photogr::J.phic reconnaios'\Qco. In moot ins tances , thechannels were 1500 to 2000 f ee t i n ~ i 1 dt h . In order to mine these chann e l s , i t was nocessary t o drop · s t r i ngs of mines a t minimum spacing a tvar ious angles to the channels . us ing botncon 6 an d 12 mines (dopending on mine s i ze ) i n order to place 2 or 3 in thO cha'l .''l.el. A d a h i l e dstUdy of the 1'esul t s of these missions M O ' ; l t h a t . of the 78 s o r t i e s •r n ~ eto t h i s area ( inc luding the 8 s o r t i e s to the S t r a i t s anchor9.gcs,l i s t e d as to Fiold L ov o' in th e Fie ld order but p lo t t ed ... i t h Fie ld Mikaon the 3PPOnded cha r t s ) . 55 creu! plaoed

t h e i rmines so tha t tho max

imuo nunbar f a l l in tho channels. 11 crens p13cbd 3ome"G1neQ but not theroe.:rlmu:::l WIlber i n th e d u n n e l s . 11 c re ws p la C9 d a l l - t h e i r mines o u t y ~ d e

th e c ha nn el s b ut 1n e f f e c t i v s · ~ t e rd e p t b D ~opd 1 c r ~ p13ced i t s ·mineson .land (1htsuxe I s l a m ) . This i s considered exce l l en t minelay ins , p3rt ic ul :u ol y s in ca .52 ruAs were confirmed by"r3d9.r. 24 , , ~ r eobtained fromnavigg, tor 's es t ima te s , and only 2 'I'IElro assumed a"s br iefed .

(2) l l ioofigld J.,ow (Eastern o,ppro""cb to Shill'lOnosekiS t r a i t s ) .. Mine-laying i n t h i s area <:lIso Ra s direc ted aga ins t narrCl'l7channels and anchor3ga aroas . Th e p lo t s shou t ha t the 48 s o r t i e s sentt o t h i s minofield (excluding the 8 considered 1;bov13 with Mike) r e su l t edi n J2 c r ~ w sPIecing t h e i r Dlia03 so tha t th e l!l'lXimum number f e l l i n the

c h a ~ ' l e l s .9 crews placing soma mines but not tho m3Ximum number i n thoc ~ ' l e l s ,and 7 orens plac ing t he i r minos outs ide the channels but i n

e f f e c t i v e n a t e t dep ths . 'I'bis 'lg3.in i s considered exce l l en t m . i n e ~ l a y i n g .

Of the 48 runs , 36 "7ere confirood by nd.1r photogriphs, and I:? Rere es-tab l i shed by n a v ig 3 to r 's d 3 ta on ly.

(3) l .jinetiold Z eb ra ( Ts ux ug a. 1&lizuru a nd Mi ya zu Areas)Th o udnef ie lds i n those 3 r O ~ s';lora p la n te d a p pr o xi ao t cl y as br i e f edand probably d is ru p te d s hi pp in g i n tbo a ffec t ed a reas . An ans lys i s ofth o r e s u l t s sho'Q'ed t ha t of tbe 12 s o r t i e s to the T s u r u ~f i e l d . a l lcould be co nsidered e f f e c t i v e l y i n t ~ e br ie fed pos i t i on , ubi lo of t he

9 s o r t i e s to th e Maiztlrl1-Miyazu araB, 7 could be cCQsidered e ffec t ive lyi n th e b ri ef ed p o d t i o n . en d 2 :7ere ou t s ide t he br iefed pos i t i on buti n e ffec t ive water depths . The nu."'J.OOr of r ada r confirmed runs fo rthese arens i s 16. as aga ins t 5 in ~ i c hthe n ~ v i B ' t o r l sdata olonoha d to be \1.900..

-22-



(4) Minof'icld Nan (Fushiki snd N:mllo Aroa.a) ~ Tho miningor Fuahiki i s inhorent ly 8 d i f f i c u l t problem boc,use of t lxl vory sm.l larea of minoabl0 \ 'later 'lV3.ib.blo and the poor radar r"feronce po in t s .A d o ta il ed a n al ys is of the r e su l t s ~ t t h i s port di3ol0.9od t ha t 4 ofth o 11 c r o ~ bover th o ar03 placed t h o i r m i n o ~effec t ive ly in th o br io fad posi t ion , :md the rOliL,ining 7 phcod sano of t h e i r mines in o ffect i ve "iillter depths but not i n the por t oroa. Four addi t ional crmIS .placed 2 p lan o lo 3d s offoc t ivoly as br ie fed in the ontrJnco to NanaO,an d 2 p1:J.na loads in effec t ivo l1:ltor dopths _ not as briofod. - but in8000 locatioll. 'l. Of the 15 runs mado on tbese aroo.s, 12 a re confirmedby Mdar photos an:l 3 are b::lSod on n' lVig3tor 's d3to..

(5) Minefield Unolo (Niig:lta .-'!ree.) _ 'rhc minofield i nt h h aroa tlas pl3Ct,:d approxiI:Utely as briefed • . , i th 1 0 of the 13crmlS . over th o aroa plac ing th.:lir minos offoc t ive ly in br ie fed pos it i ons . :llld the ra:I.!l ining 3 crmlS p la ci ng t ha n i n e ffec t ivo m t c rdepths tm ar e t hq y may be o f va luo . Ot tho 13 runs . 8 nro confirnwdby radar scopo photographs .:md 5 arc baaed on D3VigJtor 's d a t a .

(6) Mi.:lofiold Charl ie (Fukuok9. ~ n dK'lI'a.tsu Aroas) - Ther :dnofiolds in theso aroas o:oro 111130 p1a."1tcd Clpproximtol.,y as br i e fed .Of tho 10 crewa ov.;!r tbo Fukuoka aro.9., · 9 succeeded i n p h c i n g t b e i rminos effoc t ivoly in br ie fod posi t ions , : l l though 2 \ lore forced tosa lvo because of rack m::l.lfunctions. The . tocninlng crow prob.lbly droppedt b o i r minos on l'1nd. In the K:1r':ltsu area , a l l 5 orm13 over tbo a reaplacod. t h o i r Dinea e ffec t ive ly i n br iefed pos i t ions .. Of tb o 15 runst o t a l , 11 arc con!' irmod by rad:u- aa d the rcn:einder aro baned on n w -i g a t o r l s da ta .

i . In ~ D o r 3 1tbe I!lino.l!lying r e su l ts i n this ae r ios o fmissions a re e xc ello nt and domonstr:l tc except ion" l s k i l l on the pg,rt

o f tho PfJ,rticip:ltin,g crous .

T ~ b l eI I I to Suct ion A

Code DosiBlb'1tim f o r Mines and Mine Pr0p:lrat ion

1 . The type mecbanism m d th.:l proparat ion and s e t t i n g of thocomponents in a l l mines erc spec i f i ed by tho fo l lov ing codel

a. f i r s t ~ b o 1( l e t t or) - Mechanism and Prepa ra t ion .

•

•

•

•

•

•

•

,2 Look Random

•

3 Look Rov::r so•

TYpo Looks2 L oo k R ov or so

2 Look Roverse

•

••

•

•

••

•

•"

•M - l l

MochmismM- 9 Mod 1

•

Doad Period.(soconds)

35.8

l O ~

35.8

10 .35.8

lotNo. . . . . I

Increasc.:d do-sens i U ve poriod.

. ~ -3 Hod. 1 ! l I i l

A- 3 Mod2 (lL Microf3rod condenser i n f i r in. . ; e M m o l )A-J ;1.002 (2 ~

• •~ •

t ~

Code Lot t e rABCDEFCHIJKLMN

QH~X



b. , Socond Symbol (numbar) - Sensit ivity Sett ing.

M-'i!- l M - l l :.1-11 M - l l :.-3-1 MMl A-6Codo (A th ru L ) . (M) (M) (N ) (q) (X).l!2.... (1 ) " ..ill. ....ill .J.ll (S) ID-

1 Inf ' in1 to Inf .. . Normal

•:Fino 1000

2 20 20000 2- 3 4 Mod''''' 1003 100 10000 3-4 ~ i Modium 504 10 6000 ~ - 6 . ~ Medium 305 3000 -9 206 157 10

• Lot t a r re fors t o f i r s t syubol (sec 3.bovo).• • Numeral in p ar on . r of or !) to notos bolor. ':

(1) Valuo o f r o s i s h n c c shU::l.tod aeross scns i t ro l opera t ing co11.(2) V.31uo of rc.sist3nco shunted ]01"038 so'U'ch co i l , or(3) V:11ue of toro id current in miero::lDpJros MOOSS.!lI'Y t o f i r o

lllOch.:rnlsm dosensi t izeD by t r ans fonoor shunt ing .(4) Valuo of condcIl8cr in oicrof3rad3 addod t o i nt er -l oo k do80nsit izer c i r cu i t .

(5) S e n s i t i v i t y S'l7itch se t t inG. o r oquiV.J.lont i n caso o f gr idcircui t modification.

(6) Valuo of r 0 3 i s h n c : ~shuntod "!crOS8 s03rch co i l •.

e . Third Symbol (number) - Ship Count Sot t ing . (Not PIN So t t i ng )

Code No. A c t u ~ t i o n sto Firo Code No. Actuat ions to F i r e(Nuo bc r on TB ) (Number of TB)

1 1 6 62 2

7 73 3 8 84 4 9 95 5 9 10

d . Dash bctucon t h i rd symbol m d fOUl:'th symbol.

e . Fourth Symbol ( l o t t o r ) _ Dolo.yed .'.rr:l1ng Se t t ing .

Code LettcI : .\rminp:; Delay Code Lot t e r : ~ i n sDolay

" 45 Mln N 20 daysB 3 h rs 0 25 daysC 12 brs P 30 daysD 18 brs ~ 35 daysE I d ~ R 40 d3YsF 2 days S 50 d'JYsG 3 dnys T 60 d ' \yS

H 5 days U 70 d ' )yS

r 7 days V 80 d3YSJ 10 days W 90 daysK 13 days X 100 d3ysL 15 days y 1l0d:}ysII 18 d3ys Z 120 d"l,Y8

f . Fif thSymbol

( n u m b ~ r )

_ s te r i l iza t ion TimeAfter . ~ i n g .

Code Number12345

S t c r i l i z ' l t i o nTime a f t e r Aroioo

0-15 days'5-30 days30-50 days50-80 daysBo-110 days

-24-

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o. Nunbor of a i r o r a f t mining prim:lry aronSl. 190

b . Numbar of :1ircr'J.ft role: laing cinos by r3dU': 179

o. Numb..::r of 'J.ircr'J.ft rc1c3.sing minos by D.R • • 11

d . P o r c e n t ~ g eof r 3 d ~sota operat ivo oVvr t"1rgct: 94.5%

o . N U r ~ ~ rof a i r c r a f t using azimuth s t3bi1iz3t ion: 13 0

t . Pcrcontago of m n i n g ai. rcr9. t t U!Jing azimuth ' J tabHiz: l t ion:..

a t 6500g. .tvcr:lOJ maximum. r:lngo of la::ldf ' \ l l l

to 12 ,000 f t .68.5 naut ica l c i l e a

b . 'Average o:u:irnum lUngo of bo'1cons; 13 6 n::l.utic9.1 miL;lS a t10,000 to 16,000 f t .

2 . Radar Nsvigation APN-41

a . 80th f ixed and t r a i l i n g antennas warG .used.,

b . Avcrage maxir.lUl:1 usable r'lll.3CI

(1) Cround-'iI3vo: 400 n : l . u t 1 c ~ 1n i l c s .

(2) S k y ~ \ 1 o . v e .

1300r u l l

t i c s 1n i l o s .

c . F i va malfunctions .7cre r epor t ed .

3. IF F - SCR-695'

a , 10 0 p e r cent opera t ions i70rO rc}X)rtcd,

b . Sots ;tore chocked on :lD :lVcr3Bo of 40 timos per a i rc r : r l ' t .

P.;J1'!'. IV - e:tJNllml.

1 . No. of Ale f i r i n g : 6.

2 . Average t u r r e t loud:OF UA 1: LA ·bE40 0 400 40 0 400 400

3. Average No. of rounds f i red in canbl t por t u r r e t .OF i l l 1: LA bE5' 2 4 "6 3

4. 110. of rOWlds fired in caab3t : ')80.

5. No. of rounds used for t e s t f i r i n g • . 250. Avera@:! ~ r gun: 110.

6•. Oms Loaded: Hot.

• Ba g cd on \Vi ns GJ.nnory or r ioorc ' R o p o r t o .

-41' § ] ; Q E ~ !



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7. l la . l tunotional e.F.O • • nono :u:n C0..1 .50 M.G. - Link J'Gt:1.

8. lqulpmont oporation ( to t l l p o r c ~ n t n g ooporative)I C.F.C.-lOOlC and 001 .50 II. Go - 99.1']11

9 . RoaBrka. Only 10 onocv a i r c r3 f t attaokod on thoso missions .T hh aooounb t o r th o sna l l I1UI:lbor of roUD1s t i r ed in eanbat am th e

lo w a Y ~ 0 8t o r tu r ro t t i r i ng ,

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PART V - ,\IR.. SE,'. RESCUE ?:.CIUTIES

Entiro11ission

T1!:l.o on

Location

; ~ ~ S i o n N o : ' - r -173 I 17.5 : 1n : 179 ::

I SUiiM.JUNF.ST I I: Loc, t ion J220N-1J245E

IJ230N-1J23O" J200N-1J230E J200N- 13330 N

Time on Entiro / ' I -\Location Mission' :

Location 33301I-1393OE IJ23 0N- 13545 E j J

ILocation

2000N-143.30E,

I i 152030Z ITilUO on 1J2030Z 1a?°30'? I 202030Z

• Loc:ation 132230Z "52230Z 182230Z 202230ZL

;

I~ ~ z x n ~ ~ I II LOQ3.tion Same as for respectivo posi t ions of f i r s t subrJll"ino, L : i s t o d fer each mission, I 131630Z 1 151600z, Time on 1B1600z 201600z

Loootion 131730Z "5"700Z 1B173OZ 201730Z

-_.LoC';lticn 3330N-1393OO .Time on 131630ZLocatim 131730Z ,1- - _ .._- - ' . -

SURFACE I I IESSELSI

Location I 1BDDN-1443DE - < - - - - - - - - - - ._-.-Time o n : -·t---·---j-----+----ILooation ~Entire . / I !~ ~ c ~ t : ;1 2 a : ; : : : ; ~ ~ + - - - · · ! ; ; ; O ~ -2 8 0 D N - 1 3

Time on I 131DDDZ I 1Bl2DOZ I 2D12DDZ

~ ~ : ~ ~ _ J _."3 "90

DZ I 1Bl900Z I 2Dl900Z

Crash boats were stat ioned o f f Tinian during the cr i t i ca l times a t

t'ake-otr and lam in g for each mission.

'==I

I

- 4 3 -



Air-Soa Rescue Faci l i t ies

- - - -

,- " ' - - - ..•. - - -

I42100Z I 26'2100Z f 272100Z

242300Z , 262300Z 1272300Z1- -- - - - - . , -

. _ ~ -

221930Z

222130Z I

Time on

Location

~ s a . i ~ _ nN ~ _ . _• . __ :..: : : - . ~ _ ~ 1 ~ 8 ~ 0 : : . = : ; : : = = ' ~ 8 2 ~ = = : : ; : : = - _

I SUB 1MARINES I I

: Loca.tion 3230N-132300C' 3400N-14130E 13200N.13230E ,3200N.13300E; - - - - - -1 - - - - . - - - - - . . - _ .. 1-- - - - j - - 'I Time

on EntireL - -

_ _ ' -~

- ij Location ~ l i a a i o n tI - - - _ + _ - - - ' - +- +-_ _ ---1! Location 3230N. 13230EjI -- -- . . - -- ...... - - - - - - - t - - - - -

LTime on 1

_ _ ~ t _ i o n __ . _ . ~ n ~ ~ ~ - ~ a S i o p . _I ' - - ..

~ : . j , - : : = - ' = , = - = = , , = = = = ~ = = = : I ro.mOS~ Location 2000N-14330E. . - - -- -=:.-- - - - ----

stJPJ1lmmos, 1 ~ocation I Sarno as f or r es pe ctiv e p os it io ns or f i r s t submarine_ _ _ ~ t e dfo r each mission,-

Time on . I 2'1500z i 2 4 1 6 0 0 ~ 6 1 6 0 0 Z- 'I 271600z

Location 2216302 1 _ ~ k 1 ~ 3 0 ~_! . _ ~ 6 ~ B o O Z, _271800Z ILocation r __~ 0 0 N - 1 3 7 0 0 E3 3 0 0 N - 1 3 6 ~

Time on 241600z 261600zLocation 241730Z 261730Z ;

'=F===1URFACE •VESSELS I /

L oca tio n ,1800N- 14430E i " - - - - - - - - - - - . - - - - - .

Time on J ~ ~ ~ ~ r e. / '262100ZLocation Mission to end

Location ~ r ; ; ~ N - 1 3 7 4 5 E r 8 0 0 N - ~ ; 9 3 0 E2800N- 13000E 2000N-13800E

- - - - - - - -_.-.._---- - _

..

_ - ._,Timo on I 221100Z 241200Z 261200Z 271200Z ILoc.,tion 221800z I 241900Z 261900Z 271900Z_ _ _ _ _ •.• - •_ _, . .. _ _ 1 _ _ _ _ • _ _

~ w osuper dumbos w ~ r eused to orbit the submarine position atthe times specif ied.

Crash boats were stat ioned o f f Tinien durine the cr i t ica l timesof take-off and l aming for each mission,

-44-" " - o s .... .... .... .. .



..... - - . . . . - - - - - - - -

ANNEX

B

Por t I ... Miss io n No. 173

P a r t I I ... Mis . ion No. 175

Pa.rt I I I ... lUasion No, 177

Pa.rt IV ... M1sl!l1on No. 179

P a r t V ... U i s . i o n No. 180

P a r t VI ... M i u i o n No. 182

P a r t VI I ... Mission No. 18 4

P a r t VIII .. JUss ion No. 185

M i u l P M Up 173. 115. 177. 179. 180. 18b_ 184 QAd 185

13, 15. 18, 20 . 22, 24. 26 and 27 YOoy 1945

"'5-



PART I _ lJISSION NO, 173

7E<JHE:R S!JHI.!ARI

PLANNINQ FOBECQST

ll.o..u' 4-S/l0 low cloud base 1600 tops 6 to 10,000 t t increasingnfter 2200K to 7/10 w it h f re qu en t l i gh t to modGrll.te showers.

Route 1 To 25 Or! 1

To 27 0 N I

To Coast:

Torgetsl Tokyo andNagoya

Kobe and

West

OPeRATIONhL POREQASI

SDJ\\O as a t bases,10/10 low cloud base 1200 tops 16.000 f t with~ c a t t e r e dlayors of 6/10 mi dd le c lo ud Crom 14,000to 16,000 f t and rninshowors,4 to 5/10 low cloud baso 2000 tops 5000 f t ,

3/10 low cloud base 2000 tops 4000 f t with 3/10m id dle c lo ud from 15,000 to 17,000 f t and twolnyers of high cloud Crom 22,000 to 24.,000 f tand 27-30,000 f t . All clear ing excspt low andhighest l ~ o rby 1600K.

3/10 low cloud base 3000 tops 6000 f t .

';lEATHER ENCOUNTERED

Base a tTpJce orr I ella low cloud. b u e1600 top 8.15,000 f t ; f i l a middlecloud bas e 11, 00 0 top 13,000 f t j10110 h ig h clou d a t 30,000 f t :v i s i b i l i t y 15 miles lowering to2 miles in showers.

Route oOut I To 21 Hi Seme as bases.2l0N to 23 0N: 10/10 low cloudbase 1000 top 8.. 15,000 f t ; 10/10middle cloud in b y e r s between11,000 an d 15,000 f t ; 8/10 highcloud a t 21,000 f t ; v i s i b i l i t y15 miles low erin g to 1 mile inshowers.2 3 c ~to ?SONI 5/10 low cloud base2000 to p 5000 f t ; 4/10 middlecloud base 12,000 top 13,000 f t .2 5 ' ] to Target AreQs 3/10 lo wcloud base 2500 f t , to p 5000 f t .

Tn.rq;at, ShirponosC3ki J 5/10 lowolou d b ase 3000 f t top 6000 f t j2/10 middle b u e 14 , 00 0 f t top14,500 f t ; 6/10 high cloud a t26,000 f t ; v i s i b i l i t y 6-10 miles

in haze.Nligata , 6/10 low cloud, base3000 top 6000 f t ; 5/10 middlecloud b ~ s e14,000, top 15,000 f t l10/10 high cloud 26,000 f t : v i s i -b i l i t y 10 miles in haze; l i gh trimC3 ic ing 1n middle clouds.

..46-

3-5/10 low cloud base 1800 top 5 to6000 f t ; 7/10 middle cloud b ~ s e

8000 f t ; 6/10 high cloud a t 20,000.

To 20o N; 5:;une as bases.lOON to 2zON: 10/10 low cloud baso1000 to p 8-16,000 f t ; 10ilO middleclouds in layers between 9000 an d20,000 r t ; v i s i b i l i t y 10 miles lower ing to 1 mile in ~ h o w o r s ;l Ightning.22 0 N to 27 0 NI 6-8/10 low cloud, base1500 to p 6000 r t i 8/10 middle cloud inlayers between 9000 and 20,000 fee t ,:noN to TWget AreA.l 5/10 low cloudbeca:ning 1/10 a t end of z.one. base2000 top 5_4000 f t .

Shimonoseki: 0 - ~ 1 0low cloud, basC32000 f t top :3000 f t ; v i s i b i l I t y 10miles in haze.Niigp.tQI Claar with patch es or ground

fog.



RoutoB ~ t u r n i n c;

Sa.me o.a Route Outgoing.

BOoSe onRoturnl 4/10 lo w cloud bOoso

2000 to p 6 to 10,000 f t ; 4/10high cloud at 30.000 f t .

Same aa Routo Outgoing except forc u m u l o n ~ b u aand showera encountorodOot 24 0 11.

e .9 /10 lOYI cloud base 1200 to p 6 . 1 5 . 0 0 (f t ; 5_6/10 middle cloud base 10,000top 11,000 f t : Vis ib i l i ty 2-5 milos inro.in.

WINOS oLOFT - PORECAST

BQU to 20 0N gOOn to 30 0N 30 0 li to Torget t u n t

20.000 245/15 -1 0 310/45 -1 0 290/48 - 1 ' 210/60 -1 7

15.000 2 3 5 / 1 3 -0 1 310/35 -0 1 300/38 -0 5 270/45 -0 7

10.000 2 2 5 / 1 3 10 3 2 0 / 2 5 08 305/28 05 270/35 03

8.000 210/11 14 330/20 1 2 3 0 5 / 2 3 09 Z70/30 08

6.000 2 0 0 / 1 3 19 3 5 0 / 1 5 lS 305/19 1 4 260/20 1 34,000 1 7 0 / 1 4 22 010/15 18 3 1 5 / 1 5 lS 250/15 15

2.000 145/18 24 040/15 21 1 5 5 / 1 2 19 240/12 1 7

Surfa.co 1 3 5 / 1 3 28 Missing 110/07 23 210/08 21

mNDS ALOFT _ OBSE1\YEQ

8 M ! t o gOON Tgrget

6.000 290/25

Surface 1 3 0 / 1 0 -12



30,000

25,000

20,000

~ ~» , , > > >

' I S S / O N 1 7 3

fORECAST WEITMIRe h ....

~ ~ - v . - ' : ; . . v

/3-14 M AY 194- .5'

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15,000

10,000 I=n5.000 In

S U R f A C E ~ f~

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30.000 OISIIf l . WIATHII

•5,000

-~ . . . "/ O h - d0000 ~ » = , &

"-315,000 -

9',.,& > 4 00,000 -- - ~ ~

V "" j/ a97 o

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U ID 000 0-. ,e -., U U I- 0 U , ~ .col8 t 3 0 U

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PlJ .wIm 'CBWM3T

&\SES: 4/1010'11' cloud, ba se 1 60 0. tops 5000 t t with scat tered 11sMshonersi scat tered middle cloud clearing to 3/10 l ~ cloudonly by 1800K.

ROUTE: To 2 0 ~ :

To nON,

'j'o 27"l!,

To coas t :

SOme 0 5 bases.10/10 l eg c loud , bc.se 1000. tops ro th l ayered m1ddIe cloud t o 20.000 f t and continuous re in .5/10 low c loud , baso 2000, t ops 6000 \ l i th 5 /10bands o f middle cloud, baee 14 .0 00. t op s 16,000 t t l10/10 1011 end middle; cl cu d i n cold t r o nt v it h topst o 20,000 i t en d ra in & t ~ o n d l n at o ond over .rapentl'E>st of 136o:E, bre.:l.king . to 5/10 100, base 2000,tops 6000 f t . 4/10 middle cloud .. boso 14.000. t o p s16,000 i t . n .... s t a t 1 3 6 ~ .

TARGETS: "7, Hone:hu. an dKyushul 2-3/10 low eloudr ( /10 h ig b olouda t 2 3 . 0 0 0 f t .

Opera t iona l ForecQst

BDSB a t Toke o t t : 4/10 lc:m cloud.base 1600. top 6.8000 f t ; 3/10 l!liddlecloud. base 12,000 f t . top 13,000;4110 high cloud a t 30.000 f t j v i s i b i l -i t y 15 miles . la;rt:ring t o 2 miles insh Cl'I76r s •

.Jeo.ther EncO\ffitpred

2/10 100- cloud. base 2000 t t I t o p5000 i t ; 8/10 high cloud a t 25.000 t t l

Route ou t : To l 8 ~ : Same a s bases . ,TO 20'"'N: 4/10 low cloud, base 2000l80n to 26ON: 4 -5 /1 01 0 \1 c lo ud . bose l f t . top 5·6000 f t ; 6/10 high cloud1800. top 6-7000 f t ; occasioool to p :ot 25.000 f t .15.000 f t ; 1/10 m id dle c lo ud a t 12,000 :20Dri :to 26On: 7/10 lOif cloud, basef t ; 4/10 high cloud a t 30.000 i t ; . 1500 f t . to p 8000 f t VIi th occo.sionnls c o t h r c d l i s h t shooers. ' tops to 15-20,000 t t l becaning 4/10260r1 to 29Op: 8/10 lcm c lo ld . OC:Sl':: top 5000 f t a t end 01 zone; 8-10/101000, top 9000 f t \71th ocoosional tops middle cloud. i n layers betl7een 10,001t o 18,000 f t ; 1 0/ 10 m id dl e cloud. base "and 20,000 f t j t h u n d ~ s t ~ m s ~r a i n10,000 f t , top 15,000 f t ; 8/10 high ~ c d u c e dVi s ib i li ty f ra n 15 mi10s tocloud a t 26.000 f t ; v i s i b i l i t y 10 miles 1 mile .l ooe r ing to 1-2 miles in shatJers; l i g h t .26or.J t o 32"N: 4/10 low cloud. baser ime ioc above 12.000 f t . 2000 f t . top 5000 t t i v i s i b i l i t y 102 9 ~t o 33otl: 5 -6 /10 100 cloud. bose mi los in l i g h t hozo.1800 f t . to p 7000 f t ; 6/10 middle cloud,J20N to t a rge t oreal 3/10 la;r cIou;:.bose 14.000, top 15,000 f t . 2/10 high bose 2000. top 4000 f t ; 8-10/10 mid-cloud a t 27.000 f t . d Ie c loud . baso 9000. top 11.000 i t j330N t o t a r s e t a reo : 3/10 lorl cloud, vis ib i l i ty 12 miles in hazo.base 2000 f t . top 5000 f t i . 4/10 middlecloud a t 15,000 i t .

Targe t : NDSo,YO: 3/10 low cloud, bose2000. top 5000 t t l 4/10 m id dle c lo uda t 16,000 f t ; vis ib i l i ty 12 miles.

RouteReturning: same as Route OJtgoing •

.Nagoya: 3/10 1O'ii cloud. base 2000,to p 4000 : t t ; 9/10 middle cloud, bwte9000. top 11.ODO t t l v i s i b i l i t y 10milcs i n haZEl; 'Rinds a t 8000 i t nere270 degrecs a t 35 knots.

same e s Route Outgoing.

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PART I I I • MISSION NO. 177,

WEATHER. SlAWARY

PLANN ING poC!\ECAST

W u l 3/10 lo w c louds , bUll 2000 r t top 5..s000 1'1: I 1/10 middle c loud .base 12,000 f t ; 4/10 hi gh c lo ud base 30.000 f t .

~ I condit ions as a t basoe,3 /10 low c louds base 2000 top 5000 f t .10/10 lo w ~ l o u dbaBe 1000 f t , to p 8.20 .000 f t j10/10 middle c lo ud b aa e 9000 f t , top 16,000110/10 high cloud a t 22,000 f t ; ralnahow.rs .

~ 2 S , , - - ° N , , - , t ~ o W t ~ b ~ ' U ' S ' A . ~ § t . ,SilO low c loud , b u . 2000 top 5000 f t ,

Taree ta Western ( w s h u ! 6-9 /10 low c loud b o e 2000 top 5000 f t ; 6/10high c loud a t 23,000 r t c c m l n ~in by 16001,

Southorn POAlt of HoaphY; 1 - 3 / 1 0 low cloud base 3000 top 6000 r t

QfWTIONAL FOREQ.1.ST

B an ..tTake orr I 4/10 lo w cloud bASe1800 r t top 8000 f t ; 2/10 middleoloud base 13,000 top 14,000 f t ,

Route~ To ?3oNI Same condit ions• a base . ,aJ°R to 27 0NI 10/10 low cloudb a n 1000 top 6_10,000 N ; ; 10/10Qiddle c l o ~ dbase 11,000 t t top

22,000; 10/10 high cloud base25.000 t t ; l i g h t rime ic ingj v i s i ~

b i l i t y 12 miles lowering to 2- 3mile in rime,27 0 N to 30 0 N, 5/10 low cloudbase 2000 r t tap 5_6000 r t ; 6/10middle cloud base 11,000 t t l top13.000 t t ; 2/10 high cloud a t27,000 f t ; v i s i b i l i t y 8 milas i nhaze.~ to ta rg e t o r e , I 3/10 lo wc lo ud b as e 2000 top 4000 t t l 1/10high c l o ~ da t 28,000 f t .

Target . Shimonoseki St ra I t s I

3/10 low eloud base 2000 top4000 f t ; 1110 high cloud a t 30 ,000 f t ; v i s i b i l i t y 6 miles inhaze. WnkqsA' 5/10 lo w oloud bBSG

2000,top 6000 t t ; v i s i b i l i t y 1:ni les in hnze.

Route ReturninglS ~ ea . R ou te O urgo in g

3-4/10 low e l o ~ dbase 1800 with sca.tte red show-rs a t Tinia.n,

To ZION: 3-4/10 low cloud ba.s8 2000f t , top 5_6000 t t •21 0N to 230 l i j 6-10/10 low c lo ud b ase1000 top 7_9000 f t ; 10/10 middle cloudbase 9000 to p 11,000 t t ; scat tered

l i g h t showersi v i s i b i l i t y 15 miles loweTing to 1 mile in r a in .?JON to 2§oNI 3 ~ / 1 0low cloud base2000 top 5000 f t ; 8/10 middle cloudbase 9000 to p 11,000 f t .26 0 N to 32 oN: 2-5/10 low cloud base3000 top 5000 f t ; Vi s i b i l i t y 15 milesin l i g h t h u e .~ 2 o Nto t a u e t area l 1 0/ 10 c lo ud s i nlayers from 2000 r t to 14,000 f t , beccing sol id w ith tops r i s ing to 22,000 t24,000 r t ; moderate to heavy turbulenlrime ic ing with some olear ice repor tep e r s i s t e n t l i g h t c on tr ai ls a t 25,000 f

Shlmon9, .ki S t r , i t s l 7-6/10 low c l o u ~

base 1600 f t top 5000 f t i 8-9/10 mldd:cloud b e t y ~ e n7_8000 f t an d 10-14,000f t ; 4/10 high cloud a t 25,000 t t ; v isb l l i t y 10-12 miles in h u • •

Same as Route Outgoln&.

Base onReturn;1800 to p

~ 1 0low cloud base6·8000 f t .

-56-

1-3/10 lo w cloud basebi11ty unres t r i c t ed .

2000 r t ; vls i_

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10 .0005 . 0 0 02,000

Sl l r f . . . . .

2a0.615

160/15225/15135/13

1120

25

30

240/15240/15250/15230/10

111924

29

--- . --295/23 ..310/19340/15160/10

07

15.eo23

290/30290/20280/10280/05

04131720

14 .000

7 ,000

.eo"N to asoli §SON to T a r " ~270/15 285/42

,

70 r g e t

:500/24



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WEATHER StIWMY

PLANNING FORECAST

~ l 4-6/10 low cloud base 1500 topa 5 to 10.000 i t with showers Ino v e n l ~r-Suclnt,: ce l l in& temporar l1y to 1000 f t .

Io C Q u t :

Route I Same as b a s e s .10/10 lo w cloud and middh cloud t o 18,000 i t withr a i n and c lo ud t hi ck en in g in af te rnoon to 25.000 i t

in afternoon 1n approaching warm f ront wave.6/10 lo w c loud b u e 2000 t o p s 6000 t t ; 3 /10 midd lec loud from 14 ,000 f t to 16 ,000 i t both I n c r e a . s i ~

alowly d u r l n ~the day.

T ~ · , e t ' lAlII 8/10 low cloud base 1500 tops 7000 f t ; 6/10 middle oloudfrom 14,000 to 11.000 f t ; 6/10 h l ~ hcloud from 25.27,000f t west o f Nagoya increasing to 10/10 afternoon and upper

cloud moving into area eas to f

Nagoya 1n afternoon.ONRhTIONp.L FORECAST "ATHER E2WOUNWRED

B a " a tTQke o r f l 5/10 low cloud base1800 top S-eOOO i t ; 1/10 middlecloud a t 15,000 f t ; 2/10 highcloud a t 30,000 f t i v i s i b i l i t y15 mile . 10'l'l"ering to 2 to 3milo. in showers.

3.5/10 low cloud bale 1600 f t .

Route~ Io 2 5 ~ ' Same as b u e aexcept no showers.&50Jf to ?BoNI e/10 low cloudb ~ s .1200 top 6.10,OOOi 2VIO

middle cloud base 15.000 f t ,top 16,000 f t ; 4/10 high cloud at28,000 f t ; . i . i b i l i t y 10 mileslowering to 2-3 miles in showers,280U to 30 0N; 10/10 lo w cloudb ~ s e1000 to p e.14,OOO f t ; 10/10oiddle clodd base 12,000 f t , to p17,000 f t ; 4/10 high cloud a t27,000 f t ; l i g h t rime ice above14,000 f t ; l i g h t to moderate ra inreducing v i s i b i l i t y t o 1 mile .30Gn to 34 0

NI 5/10 low cloudbase 2000 top 5000 f t .

Io 2lo:t'l 3-5/10 low cloud b u e 16 't o1eOO f t , to p 5_7,000 f t ; 5-10/10 middle cloud base 7000 top 6000 f t s t a r tin g a t 16oti; v i s i b i l i t y 20 miles loW'..e r ing to 6 miles in scat tered l i g h tshowers.2Ion to 24°)l: 6/10 low cloud base1000 f t top 10_12,000 f t with bui ldUpll to 25,000 f t i 10/10 middle cloudsbetween 7000 and 8000 f t and 9000 and20,000 t t ; v h i b i l i t y 10 miles 10l'lerin;to 0-2 miles 1n h e ~ v yra in ; moderateto heavy turbulence and l igh tn ing .240N to ?eON, 1-3/10 low clouds base1eoO top 4-5000 f t becoming a/10 a t th .end of the tone; J/ lO middle clouds,betl'leen 1 6 ~ 0 0and 17,000 f t .?ll,CN to i W ~ 1e/IO lo w c loud ba se1500 top 6_10,000 f t ; some tops to20,000 t t ; 10/10 middle clouds base12,000 i t ; v i s i b i l i t y 10 miles lower in l

to 5 miles in l i g h t showers,30°" to t , r g e t a r o i l 6-10/10 low clouctop 5-6000; 5-9/10 middle cloud base14,000 top 16_16,000 i t ; v1a1bil1ty 15miles .

- 61 ·

" Q J ! 1 1 I H J ! I 1 A l



C O N F I p E N T I A L

Torget: SbimpnoReki StrgitR:6/10 low cloud b u e 2000 top 5000f t ; v ia ib i l i t y 6-10 milea in haze.i!&k'RD' 10/10 low cloud b ase2000 to p 5000 f t ; 1/10 high clouda t 26,000 f t ; via1bi l l ty 6 .10D i l e s i n bazll .

RouteBaturn!nr;SQl';Ie as Route O u t ~ i f l l ;

Bnae onReturn; 4/10 low cloud base1800 to p 6-8000 f t j ~ 1 0highcloud a t 30 ,000 f t j v i s ib i l i t y15 miles

Shlmonoseki S t n l h l 6 ~ / 1 0loW cloudbaso 1800 to p 5-6000 f t j 8 _1 0/ 10 m iddle cloud base 14 .000 top 21,000 f t .3 5 ~to 136°8 , 9-10 /10 low cloud top6000 t t ; 10/10 middle cloud baSil 8000f t , top 9000 f t ; Vis ib i l i ty 8 miles i n

hale. -nnds o.t 6500, 310. 25 knots.

Not ava.110.ble

1 - 2 / 1 0 1o,,. cloud base 1600 f t j 6/10high cloud a t 30,000 f t j v i s i b i l i t y20 mUes.

WINDS ALOFT _ FORECAST

BAIO t o ?oon 20 0 N tg 29 0 N 29 0 N t o 35 0 N I a n o t

25,000 230/10 -2 1 260/38 -23 260/50 -29 260/50 -'"20 ,000 180/10 -10 260 / ' " -12 260/4,0 -I" 270/4,0 -161 5 , 0 0 0 160/10 00 255/22 -<l1 270/35 -<lS ?:T0/35 -0 810 , 000 140/10 10 255/18 09 270/25 04 260/25 02

5 ,000 1 1 0/1 0 17 255/16 17 320/20 10 330/20 092,000 100/10 23 260/14 22 360/14 16 010/14 16

Surface 100/10 26 250/09 26 040/12 24 040/10 21



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21st Bomber Command Tactical Mission Report 177etc, Ocr

Documents

Transcript of 21st Bomber Command Tactical Mission Report 177etc, Ocr