/ ./

.::"' B-J-S-M-800

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: • ! . ~ I

AM 164 ·· -

BRITISH JOINT STAFF -MISSION

Offices of the Combined Chiefs of Staff WASHINGTON

·· 25 Auaust 1945

· MEMORANDUM f CTE · Brigadier-General Carter w. -Clarke . . . : B:rig(ldier--Oener~ w,. · ~s~on COl!'_derman:. -".

,· r •.

·SUBJECTS §epurit1 ot Allied Cipher§

I enclose herewith a further pape~ in this

series dealing with Security ot Allied C011!1J11m:ications.

·~ () ~ic M. Jo~s, ~Group Captain.

Encl: TJLTRA/ZIP/SAC/J.S ot 17 A~t (Cop;y S tor G-2, 9 to S.S.A.)

Declassified and approved for release by NSA on 01-05-2015 pursuantto E .0. 1352a

... \.

.~

0

- (.

/

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/

REF ID:A4148546

~utTRA Copy No: r ULTRA/ZIP/SAO/J B • .

'!'OP ffi!leltt:T Do 17/8/45 ..

.. SECURITY OF JILLIED COMMUNICATIONS.

Far Eastern sUrra:iary. No. 8 •.

I. ·rntelli8ence derived from Cry;ptannlysis.

· (i) ·British

Arrrry Comurunications.

(ii) u~s.A.

Airoraft Movement Code.

( i.ii) - CHJNA.

(a) Attache Cyphers.,

(b) .Army Communications.

(c) Air Corrimunications.

' ( iv) TURKEY •.

Diplomatic_ Cypher._

(v) RUSSIA.

(a) :Intelligence from HARBIN.,

(b) i'irmy Communications •.

( c) · Met Reports.

(vi) FRANCE. ·

(a) Diplomatic Cypher.

( b) Consular Cypher.

( c) siuciy C?f French Comrm.m.icat ions.

II. Enemy Sigint Organisation •..

.er ,;/' ! .. '

, ....

0 '7f,}

'---, ' r

19/DSI 26/4/4-5~

SEAT IC/ 14-1.

REF ID:A414B546

I -1 ....

I., Intelligence t"_eri ved from Cryp'C~ysis.

(. i) British,

a) Army Communication_£.

b)

1) \ '

2)

3)

li\Jrther information is nrnv available about Japanese Army Sigint in the Burma area from the recent interrogation of an apparently reliable P. o. w.

He stated that the Signal Intelligence Seytion, attached to fanny H~Q., pc_;.'iodically broke Allied (non Chinese) codes. He rememb'ered seeing a la1.:-ge TOPSEC file at H. Q. 33rd Army marked 'A' Intelligence, which cont.tined results of cryptographic success; a.°'la .. Japanese staff officers discussed in an excited manner t:fo fact. that 'vre had discovered the location of the:l.r H. Q. This fact »·ras confirmed by heavy bomber attacks on their H. Q. . P. o. W. stated that the Japanese invariably ascribed the leakage to activities of "Radio Spies 1•1, i.e. local agents equippe:i with wircle'ss sets for transmitting informa:tion b~ck to the AJ.1ies, Hence the whole Japanese staff was infested by "Spy fever" most of the time,

I

Extracts from Docum6nts captured at 1\filIKTILA 12/3/!:Q, giving .A! Intelligence of Bri.tish 'dispositions and trooE movements.

From 15.th i1rmy Intelligence Report (no' date given) •.

CHil\IDWIN River .Area.

"No. 2 V UNIT advanced E from SATK.AYA '8..!"ea, and reached TON-lviAKENG-MAGYIBIN area. · , • . In correlating "A1' Intelligence.!! the 98 Bde .. appem-s 'to be ,attached to 19 Division, and its organisation is as follows :- ·

2~' and 24 P.ssam Rifles at H KO DAU:NG. 28 Assam Rifles at NLASEJN. "

I

Extr\3.cts from 1_12j;h Army Intelligence Report·.lst ~ 10th January.

!._Intelligence. I

The 19th Indian Division seems to be planning to attack tho Command post at ONBJ\.IB\ on the 10th J,anuary,,.

Organization of 19th Indian Division A Inteiligence~---

62' Brigade : . 2 Royal Welsh Re gt. (n:_·j.t-ish J\:nµy). 3 11 · Rajput Regt. ~In.Lian !:.rmy). 1+- Bu 6 Gurkha Regt' ~ II II: ) n

64- Briga·d.e 2 Royal Worcester shire Re[;t. (British itrmy). 5 Royal BaJ.uch Regt. (Indian Jtrmy) •

. 1 Bu 6 Gurkh:;i. Regt. ( Indi::u:i. ).rmy) o

98 Brigade : . % Royal Be::..~kshir~ Regt. (British l.rmy)" l+ Bu Gurkha Re fot • ( Indinn Army) .. · 1 Bu 8 Assam Rifles Rogte (.Indian J'u:my).

c 1066.A.

REF 'ID:A4148546

-2-

The source of this intelligence is not given, but it may possibly be from the result of reading British .Army Cyphers or from Chinese sources.

See Zll'/SAC/J7 for P.O. W. report on reading of British .Army Cornrrrunications in Burma lttea.

'(ii) u.-s.'.A • .i. '

a) . .f'i.~crai't Movement _g_o~c •. , , ... , Reported Change in A.m. Code.

SAIGON Southern. Area· lirmy to. Tokyo on 16 Ju:ne 1 1945 •. "The .AM (Aircraft Movement) code which changed from. a:

3-f igure to a ·4-figure book on 1st April was still be_ing • ' us_ed on l~th May. 11 •

c 1050 A,C,D,E-K,M.

On 17th June 2nd .Arca iUTny reported recoveries in the basic book of the AM code, which changed on 5th Jun~~

c 1058 A,B .•

b 1063 - D~

A list followed giving 66 recoveries of a two letter. substitution table for letters, nwnerals, abbreviations and

. · variou·s types of airer.aft ..

Some-of the conunon abbreviations had alternative substitution :-

e.g. De~. =AH, CI, CN; EC, XO, HM ARR ::: DP, GC ,_ HG, . IN, LA, OF·, XA.

I

Types of aircraft· were identified thus:-

R 4J)· c 54 B 25

= '"'"

=

DC lB PH etc.

These results were arrived at with apparently a 12 day time lag•

b) On 28 June Tokyo sent PINRJU\fG the following signal :-

"The average n~ber of Al\{ code messages intercepted daily is approx:i.mat~ly 100 - Because of the ·small number of messages at present, it is difficult to do decrypting ~ Please report the results of' your work, as they are obtained.

The next change in the basic book is to be on 5th July A Intelligence'. 11

A list of some recoveries of a two letter substitution for numerals was given but the meaning of some o:~ the abbreviations, BUNO, ETF, A.AC, SEN had ~pparently not been ~.:1car ..

1

c) On 1st July PINR.ANG replied to Tokyo :

''We are reading ;perfc:ctl~ types of aircraft, place names

In the original text :

all .i\M code nuinbers, letters, etc, in the b[Lsic book~ • • • • • •

ETF = cstiril.a.tod ti.lT!C of flying. AACS ~ .Arr:ry Air Commtihication Station ·

(guides aircraft back to base). SEN = SENT.ANr, an airfield in Hollandia.

BUNO is an abbreviation included in names planes, but the meaning is not yet clear. We our 'activities and re-examining our results .. "

of Navy transport are increasing

' .

UBJ 15572.

J 62545Ao

UBJ 15580, BLY OS)lOo

UBJ 18165. BLY 1073.

J 75337A"

-· REF ID:A4148546

-3-

iii) 0hina •. a) .~i.ttache Cyphers,

Some.-furthor examples of D. Intelligence have recently become q.vailn.ble (for previous reference see ZTI?/S.A.C/J7).

I

1) ·n 4 Intelligence (i.e. Sydney), Tokyo to IVL:il'JILA on 13th DecembGr, 1944.

"£11ncr±can Army posit:'.ons on LEYTE according to D4 Intelligence of 6th DecerrlncT - Tho :;2nd Division is attacking our· T.i\Jl.11\/GYOKU g:r:oup., The ?4th Division is replacing the forces around CAPOOCAN. The 1st Cav.s.lry Division is at Wcster_n S.AJl11',R. Islmid (it is doubtful if this is the i.:ain for9c). The 96th Di vision is in Central LEYTE, ~:~; is attacking our units. 1:h~ 7th Division is in the neighbourhood of PJ.L.1\M:AS •. "

2) D6 Intelligence (I.B. Washington) .. . '

Tokyo to NANYlTSTH of 4th J

.(

JEQ 1754 GRO 7664

UBJ 18129

REF ID:A4148546

-4-

6) ·On 30th June tho 7th i.rea il:rru.y (SJNGllPORE) sent the followmg report to D1\LAT containing extracts from. a signal sent by tho Naval 11.ttachc MELBOURNE on 27th June, which vms issued by

· G.C.C. S. as BJ 146872.

"A Intelligence Ropo'rt.

War situation of BORNEO area sent 'on the 27th by MELBOURNE Observation Unit.

Enemy positions _N.E. of DJOEWAT.ll. oil-f-ields in the TARiJV\N sector have been recaptured. Following this' enemy resistance in this area'coased.

In the BRUNEI Bay sector, Australian ,troops captured SERIA on the .22nd. The enemy razed and burnt 21 oil~fields in this area. On the.20th, one detachi~ent of Australian troops succeeded in landi~g at LUTONG and moving four miles South, reached "PlwUTTO".

In the LDIIBANG _sector., colunm heads of Australian troops ·have moved towards UKONG following ·the LIMBJ\NG River. - However, as yet, they have not encountered the enemy. In the WESTON Sector, patrol tro.ops of the .A.ustralian krrny reached G1\DONG and NAP.ARAN on the 21st. They did not encounter the cncrny.

On the 19th, the Australian i'lrmy landed at MEiv.a?AKUL s. E. of LABUlili Island, - However, as yet no resistance has been encountered. Column. heads have reached KilR.UKl\N, 1 6 miles N.E. and KOTA Ia.LIB, 8 miles S.E. ".

It will be seen that the ~ine'lag in the signals quoted vary between three to sixteen days.

7) Work at RANGOON on NEW DELHI-CHUNGKING Link. . '

Although the later si~als giving D Intelligonce arc promulgated by the 7th Arca A:rrrry at SINGAPORE it is clear from the following messages that t~c Special Intolligence Branch nt RANGOON in the early part of 1945 was to some extent responsible for the interception, decoding and collation of this type of In telligcncc from tho NE\:Y DELHI-CHUNGKlliG linl

._ .... , ..

PBJ 16~84. BLY 0949 ..

ZIP/JES/ 7059.

J 53 28711..

J 55091 :A-F H-J.

UBJ 19601. Extract.,

UBJ 14738. BLY 0838 ..

REF ID:A4148546 '

b) ·Rangoon 1nr to Tokyo Air on 23rd -Januaryo •. "Please reply at once in connection with the following matters relatmg to the collation of intelligence reports from the Chungking peop:J_e in India, which is to ·uc effected by this Branch in the near fµture. Do the remainder of your 1944- pionthly Intelligence r~ports h3_;ve a low or high priority ?- . J:,re ·the text books from Sil.IGCT-.J'to be used for these messages? . Please advise Southern .fi..:rmy Chief of General Staff whether or not interc~ption ·can be carried out on a lovv priority ? 11

c) . On 2.9th January, Rangoon infonnod SAIGON that the code used by the.: Ohungking Mili tElry Lttac_hes. abroad passed ~ high speed _int er~tioE.

SEATIC/J.410.

UBJ 9038~

JEs/7059.

REF ID:A4148546 •.

-6-

5) Japanese aware of British Intentions from Chinese Sources. /

Extract from a doc1.lf:1cnt captured at MEIKTILA 12/3/45· Burma Area Army Intelligence Report 20;.:31 Deceraber 191.,l+. A. Intelligence. ·"To LEE. O~C. New 22 Division (Chinese) from LUI, O.C~ New 6 i\rmy 21st.December 1944.

The B_ritish 14th 1\rmy will command the 4th and 33rd Corps _and will take .positions for -advance into EU.dale reaches of the Chind1,iin~ NEZ.1\. River will be the sector boundary between thGB and 3 6 Corps.

1 33 Corps _will conD.and 5th Indian Division, 11th E. 1\frican Division and 60th Division~ Their role is to cross the CHINDWIN to the East, attack TliNTABIN, and

garrison .SHV/EBO.,

The H.Q. of the British 36 Div (36 Indian Div ?) is at Ki~NI. The Division has taken up positions for the attack on MONGMIT-o 1''

c). ·Air .C.ommunications.

1) Signals read vri-Lli. delay;. 5th Air ilrr'J.y, HANKOVi to Tokyo of 21st August; 191.,l+.

2)

(7 day time lag).

"According to an;"A" Intelligence.Report, the Ju-,1erican representatives convened at the SINO-American Iirmy Transport Ho Q. at SINTSING on .the 14tl;J. August and nade the following decisions. Following the increase in the amount of various commodities transported by air to the aerodromes in-the environs of CHENGTU, 50 trucks are to be allotted as follows to those aerodromes •••• .,·"

The Japanese 13th .Air Di:vision_ at Cantor sent on 21 June the following signal to LTIJCHOW.

"The 1Chungking 1st and 2nd Air Arnies (? YING YUJ.11'!1

and SINFENG) have novcd to CHJ-INGCHOW .,,. ... 26 May ••• • •

A Intelligence.'' This Nessage appears to have been read with a time J.~-'-8 of 5 weeks.

Lov-v r,radc Air CoEUilunications.

On 27th January, 1945, Tokyo p~ssed the following signal to Rangoon concerning Chinese Air cyphers,,

"Many lmv sccuri ty codes arc used for air cornrrrunica-tions. . The systcDs such. as the followine are used by the Chungking JJ.r Force and deal with patients entering the hospital, and cor,1r.1oditios, but they contain little intelligence: · SHIMMITSU. This is in process of solution. HIJO, COS, ITSillfiITSU. These have been solved.

11

On 29th January, Rangoon informed SAIGON that t~cre were many low grade codes used by tJ:ie Chinese Aviation Cornr:tlssion in India. These dealt with supplies to. CHILNG KAI SHEK and were o.f little in tell igcnce · valueo

.-- .. I

>

' JilIJi./ 11:606

BRUTP 12814

REF ID :.A4148546

. -7-

(iy) TURKEY.

Diplomatic Cypher•

The Military Attache BERLJN sent to TOKYO.on 21st March the text of n. signpl despatched by the Turkish .Ambassador in CHUNGKING to his Government in the begiriping of F ebrunry

"Internal situation in China.. YENAN did not agree to the incopporation of the Communist Army in the Peoples krmy, and negotiations with the Communist Party were broken off on 22nd December. . Tho American· l\mbassodor HURLEY went to the actual plnce (? YENAN) to pass on instructions from· Wl\SHilTGTON,. and hod discussions with tho Communist Porty but failed to.gain.?l'\Y objective, and reported to the illncrican Government that YENAN had been acting in a vm.y which made reconciliation difficult. - · The Government informed the .lunbassador thnt no other policy was· open to Ju:ncrica but,{support CHJJNGKING." ·

to ·

This signol was road with· about 5 - ·6 week time lag.

It was knovm. from messages passing between HELSINKI nnd TOICTO during 1944 that tho Finns and Japanese exchanged information on the reading of Turkish Diplomat,ic Cyphers.

It is possible· that the code involved is Cypher' 25 (S!J\.ARYA) yrhich until recently wns the only book used at CHUNGKING.

( v) RUSSIJ~.

a) Intelligence from HARBIN. Possibly through physical means.

On )7th l~pril, 1945, the R. N. O. at HL.RBill sent the following report on Russian Intelligence to TOKYO.,

"From PETROPJ.VLOVSK to VLADIVOSTOK. (Russian) No.val Attache in .l'.mcrica.

A report from the

7th tpril. In reply to Senior Officers (Air Forces) of the .fleet in the large scale air assault on OGASAWARA, COMINCH considers that at tho present stage of the OKINAWJ1 operations the fleet cannot be sent, and, furthermore, thot air forces do in fact possess sufficient strength for the initial attack. 9th April. COMINCH is leaving only light cruisers cmd nircro.ft 6nrriors ll1 forward areas, nnd has recalled 3rd Fleot and both Task Forces. The position is now such that he has no alte:rmn-tivc but to a-wait preparation of n nm-1. airfield on OKINAWA. 1. th J, ril. COMINCH has just reported his reasons for stupping t c advance of 3rd FJieet, (5 blanks) tho appearance of a power-ful f loot in tho EAST CHINA SEfl.. Thn t i,s to say, he is hny:i.ng battleships of 3rd Fleet romC1in in OKllfAWA vicinity, nnd hoving cruisers accompanied by aircraft co.rricrs· advance· into the abovo area.

I

'

J.63392· JM/CRYPT/ 69/16

UBJ· 14-992 BLY 084-9

REF' ID:A4148546 '

Fron the Russio.n Lcg1:1tion in J:..ustr1:1lio. to tho Foroic:n hiinistry.

8th lpril.· 5th ond 6th Squndrons 1:1ro continuD1g to send nircrnft which nro to make OKJN.AWA their bose. Reserve nircrnft from Sf.FAN 'ore. bc.ing sent ns ropl.:icoHents to. Tnsk Force 58 ond it is urgod th0t tho remaining ships of Tosl: Force 3, which hos peen ternporar.ily disbonded, should be incorporated in Tnsk Force 58. (? 6) crock 'auxiliclry co.rricrs ·rrerc to· hove arrived. Dt S./•Il':iNwitfr41 the vmok,. but those nro novr to s:.·:il direct -~o reinforce To.sk Force 58. 9th J.pril. BRITISH !+th Plco·!; is noyr steadily moving up frcir,1 the son Brea· off, Si~KISHiiiiL to the OKJN...'1.WA oron. Thero nre signs in foct tttc British Chief of Staff has ordered tho disp0 tc11 to the OKINAWA nrcn of n further 2 battleships, 2 cru~i.:>::irs, 5 destroyers ond 2 aircrnft carriers to relieve darnrigcd WCLrships". .

bl) Lrmy Communications.

In a signal of 31st October, 1.941+, from fu"\JHSHIKUK/, to TOKYO~ .A Il1telligencc was quoted 'giving the gist .of the. orders for the defence system of the Border Gan.·ison Unit of PETROPAVLOVSK Hnrbour and.movements of·u.s. and Jnpaneso aircraft.

This signol is very mcomplote and its only interest lies in the fnct it is one of the fcvi exnmples .of Russian 'A 1

Intelligence.

c ), Met. Reports in plain text.·

I

The Japanese 800 Met. Uni't _at HSJNKING informed PEKI1'TG • on 2nd 1 February, 191+5, that since 1st Feb.runry. all U.S. S.R •.

stntions had suspended broadcasts of wenther reports (? in cipher) and were now· ·brondcnsting in· plnin text.

(vi) FRANCE.

a) Diplomntic C;yphor.

Sane examples of the exploitnti.on of French Diplomatic trnff ic by the Jnponose have recently been seen.

1) Burma l'>X'cn Arrny 1'iAYJJIY0 to RJJIDOON on 31st D~cember, 1944., quotes "Spccinl 11 Intelligence o,f 10th December. In connection Yiri.th the RUSSO-FRENCH ilfou trnl 1.ssis tnnce pnct, ·

- SOVIET RUSSL\ demnnds HAIPHONG ns ci bnse iri the For Enst 11 •

The obove signal wns promulga tcd yfi th a three weeks time lng ••

J.

2) On 20th Jnnuary, 191+5 ,. TOKYO sent a signal to CllNTON, · SJ,IGDN: · Nl1.NKING 'giving the text· of n· message sent by the French

- ilf.lbassqdor in China on 18th Jnnuary./

"According to 1.f.' ·In tolligence, the French f;r,1bassador resident in China gsins the impression thDt the Japanese authorities fool uneasy about the future situDtion nnd arc prepnring to tnko cxtr8-orclinnry measures C1gamst tho French Indo-Ch:ino Governor General. It -.;;ill be noccss0ry from hi:S· point of vievr, ;:is the French 1.rab8SS8dor. to China, to devise some cor'rcs-pond:i.ng plan irnrncdintely. Plense report on nny sy::itous you may observe of this. We C1rc C1lso m0king enquiries .:i.s to tho present position of tho Jnpnncsc 1'1rray _in French Indo-Chinn 11 o

, I

...

UBJ 15775.

REF ID:A4148546

-9-.

3) · A further exm,1ple :ls given in a signal of 25 January 1945 frora Tokyo to SAIGON and CANTON, quoted as A. Intelligence of 22nd January from the sovernor -general of French Indo China, Yvho planned to grant a special pnrdon for four Chinese criminals. -

b) Consular Cyphers•

UBJ 13673. _On 13th September, 1941+, the following sisnal was

J 64545.

. POP I Jl{J1/53 7.

JMA 11623.

..

. sent from SAIGON to TOKYO - giving the "contents of the intercept " of a message; from an unidentified call-

. sign E~Q8 to F"I'if'Z (LYONS wireless station). 1'ET Vjs VEILLONS' C::OMME D'ff.JIBITUDE FYVv2 - STOPPONS ET Vs- VEILLONS COB1'!IE D' Hli.BITUDE - 'I/CI STU L.S. 25o :tJIL -,STOPPONS ET VS VEILLONS COHME D'HABITUDE. 11 ·

c) Study of French Coomunications.

In a sie;nal of 26th Janu2ry, the Souther~ .Army Specicl Intellip;encc Staff at SAIGON asked TAIHOKU ( TADVAN) .to send to SAIGON v-vi th priority status a French. linguist,· 2nd Lieut. UMER.t\RA, 11 s"in.c·e special· intellip;ence afiainst France has ah-eady been started."

Berlin is asked for information aboui; French Cyphers • TOKYO to-JNA BERLIN, 22nd Marchl945o

"With reference to your _telee;r2.ri1, please let us knOVT the set up and chief code groups of the French cyp~crd EJ.entioned. The others are being-road here also."

II. Enemy Sigint OrRanisation.

a) Proposed German-Japanese-Co~operation.

Japanese MA BERLIN to Sur:u:ier TOKYO cl..ted 7th April, 1945.

"J\.fter further enquiry into the question of · Japanese-Gerr:ian co-operation on scientific intelligence, . (i.e., study of cryptoe;raphy), the Gcrraan Anny has abandoned its earlier plan of sending a considerable quantity ·of· nen and mo.tcrin.ls, rccrui tine personnel.' on the spot, and formins . an indepe.nde;nt Gcnnan organisation,. and is sending instead a small nwaber of len.din.r:; specialists and some equipnent desired by the Japanese. It has put forymrd a proposi:i.l for collc:i.-oorn.tion between specialists of all kinds in TOKY0 on the some lines as Jap8.!1ese-Gcrr:wn collaboration in BERLIN: · Owine; to present conditions of. transport, I hctVc sir;nified _011r agrc_cment at this end."

Major OPITZ, a Gernon 11rmy- Sigint Officer recently captured in GerI!k"..TlY, was to have been in c_hnr30 of this p8rty - (ZIP/SAC/J7).

. .-... '9 ; REF ID:A4148546

-10-

b) Sccu.r:]...!L._~}..§P.:.~!':....Naval_~. Japanese NetvCt.l Attache BERNE to TOKYO, 8th June

SJil/1967. "Since the collafe:>C of Germany, all kinds. of secret information without exception cill!le. into enemy l'K:llds, , it is presUTiled that secret inforr,1ation excho.:1sed between

· the Germans 8.lld Japenese i:3 in enemy possession. Details of .the Jap;:mcse Navy's request thc.:.t Gcrmc__ri. · submarines ::ihould operate in For E.?.storn waters, and peyticulars of the negotiations, have been. diselooea. to the . British by Hitler's Secretory, o.nd techniccl dato.. supplied to .Japn.n, rcl3.tivc to Rn.dar, rocket aircro..ft ancL new.types of subr:1o.r:i.~1e hf'.VO all boon po.ss Jd to tho. enemy (a good deal to the British)• ·

It is believed, however, t:1c.t our ~::i:y.al ...'.:Jll.h.crs constitute .the only Cf'.SC in .which there hc.s ·SO fer been n.bsolutcly nothing handed. over to tho C-cnnc.ns. II

JMA/11484. On 7th April, the Japnnese M.A. BERLIN reported to

UBJ 7778.

J. 52112.

'

TOKYO tho dc:dre of the Germans to osto.blish cornmunicatit.:]8 in the Fer l:ast. He stated th2.t the subject of these

.. connnunico.tions would be infornation o.bout the enemy, nnd would nn.turally be sent in cypher. Dy permitting this comE1W1ication, it 'i'Julci. be possible to obtctin mo.terin.l for reading Ger~~ers.

d) Lpprccintion of· Sie;~~t Rc_ports froa 2nd Arc2, l1rm_y_J_PINRANG) ..

1) On 8th March, }".:_5, 7th J..,yca 1\.rmy -SL'\JG1\PORE informed PINRLNG of the !'incs·c:'.:!!able Vt:.luc" of' the S:i.e;int reports issued by 2nd i1roo.·1'W."Tity, end o.skcd tlk1.t infon1:::.t.ion should be pas sea_ to· 3rd fi:~)ccial /..il' Si~no.ls Unit (P.ALii:J.ffiiJ'IG), as EJ.atcrial for c..pprocio.tion of plo.ns for the .i\J,1cri-:;:·i1 Navy and Air :.0rcc 1 s .:cc"!.v