https://declassified.library.utoronto.ca/files/original/065010cd90efca821555a7cca98d58df.pdf 4bbbad88f19320ce6a75ebfb040cf950 PDF Text Text ottawa, 10 April, !.t-Ccl. J.3.C.! 7 Ont., 1941. ~::.~·;.l:ur::-ay, I~telli~9nce. _,_., a re;-ort ;.s reqi:.esta.:, ! a:n. :e~s.i! :~g ":)elow on the a~ove ::.entio:::-c: grc::p of illegal }erman trans~itters irtict are :e:~z =on:tored ~~gula~ly by the Si;na_ls Expe=!~entel 3e~tion. ?erio1 of Onerat:on '!'te f::-st k~owledge ex:3tence cf ':.:1is g:-ou:p came t:,:, li;!:t whe:: c.:'.. ;.;:-;,mt -::able was recei75d f:-o::n T:::e ·.~a= ::':rice c-:; tt.e 12 ;·.::ly, 1940. ::-e::p1es~in.3 us to ta::~ Oearin,£E o:i 't':.'7 e::.e~y trans=i tter working o~ a ~re;~e~cy ~f l4;o0 ?.:s. and loc~ted in the easte:::-::i coast :,~ <:.!:~::.:;.,:_.. ':'he ~able also re~ueste~ ~s to i3te:-~er~ ~essages ori.¤;inct :.:. • in '1er-eny, ss the '.;-er-:::1:::: end 'l'f.'::s not =:ear1 i:i 3tat!o:is, :t F...£."l_slsnd. ~~c! :)ei:J.ts :.:. pcssess!·:;:i o~ D/F t:"..e ;112:-rywe~e BS'-:e:5 :-: ~sJ:e b~-ari~is. is U!1derstoo:. t~et :--e;ue::.t !:ro:1 3ngl3nd 2:nce the 12th July •,he ~:a"'.7)·'.'.:::.s:.a:: c.:. sbou: 1?40, ~:"'_es~e bot!-. :.:.e .;ecti:~:2 ha\"'-? beer: ·N•'J:r:--:ir.:s on ::.:s cepti::~ t~is ::le 2. s:.:r:.Ear t!.::e. ::=.7;( 2..::;.d.-:,~is ;.:--,up. The :<:xperi::.e-::tel Sec:.:.o:. ::as been intergrc~:p fer ~o~s ...~C. rr:e :1:.:1e =:::::ts ;_;es tc -:.:.d ~::-wa=CiJ.; t.be ~•..:;.~ O:'~.:.ce :..::d the :-7avy. :n '.>3cec!lb~r l?tJ, the :·-?..y, ;;:~t.;,r tolcine ·~ con~erence wit~ tte ?.~.!. ~~;r9E!~t&!~~e, sto~~e-:l !::on~to~!:15 :~sc=-:::ticr: ::::s ~;:,:-1;;. - o~ ~::~ }r~·1-o --· Fr0m t'-,s b 3-i nd ..,,._. <;::<:::-a .,..~re ::tly t-:;:o trs:1s-::. t:ers i!17.:-!.7~':. : !l t~is ~--:-•:it:;. ~.:s .,..rer:?lan !'.:raz:s~~tter ".vas ::,cat-=~~ in ! ..u:~:~: ~-=i~g st=.tion c.s.11 s:;:i .:...C:2. :"!1e c:.==esno-::::e!:t v1::.s l;; 1::;.-t:e~ in 0 7i~init:; of '2-.Jsto::, i:7.:J.:_. 7::.e ::s.t~.e~ trs.!lS=itte:::- :se~ dif~ere~t call Si¤=,S ~:=,s~ =~il7 an1 -;er:; f!"'e~uen:ly c=:an:::~-:: its ~r~~·.:.e:.:l tc. 3va~e -:-a;,tu.!"e e nC rr..oni ":0r3. '.;radt:a.:lJ t:::.:: ~rou;: :e~ to :xp=1nd :ts ::c+;i\"'S..ties a~d c!l ~:"".e15 Jant:::-r-y !.?!l. ~:-d:? ·.;~r • ':-ffi ,;ie a~vi se::i. b-: cenle t~ t a r:.ev ~::-re3nondent neca.::.ie active, wori:i:i.g ~rom !.~~x:.eo ::..::dusing C· 11 sign 'J.30. This trans:J!!:tter w:::.s not :.eard in England. The E.xperiniante.l fecti~ is ~:;w intercepting this t!li rd transmitter and !o~r'1i ::1..g traffic ~o England. At the present ti~e it ts believed that two more transmitters. are located i:n the U.S.A.. �- 2 - ::creover, .!.s b:::..!.evad ':::.3.~ :;?:.c';.t:ll:..-~:!':J.E.:". cJV/"led !t 'ra:is~i t~er· :s loc:!ted :=. South .:.=::eric¤ 71~i~t is dosely allied w: th the :.CF. g:-oup. 7~.;;- t.:--:r'; of ; rea::i:les 'J.Sed 'bj'" ~=:e 5:.-t~ ~e=:.-::a :.~::::_s--::.. ':~er is :.::-...cv6 g~C. :iocasio:ially ~::t ~""::er:c:::: tr~-_::.·.:-:. ':e.:-5 ~'"ele:-"" tri:.~~ic -::' :-·,..~.:.s 4::;:-e. ~he c!_~er ::::'?!":i:ie J:c.de &r..:i e.s ti::.::· :-er.;e!_;·,?j !'°"!'O~ :;;!"~~ ··ar ~Y ~~ts:=~~; ~f =:~ e:-;.t 2,:1 ~::t:..."7.:-:.::..oi: -Mas (;f~:_~e tta~. :!"!e ::;:' ...~;" :l~LS e:!lC. ::-:E:.:. a~l :::~ :-::t:'SS~f=2 't:-::inz :.e~i~~ere:i. .;..1ttcu:¥L t':..-= ·f;~r J~~:.c-:::- c.:: no: state ;:l!lt b:!..a::-f,:in 9.::.:· corr'!=_:-.-:;::~~::c-e -:;..2.~ ~!:s :!.pher ·:~e:: ·:-J:-0}:e:1 :,roken, the :::z':rc.c~::;:1.s :-~cei7ed .1ir:ce the 23r. o!' ,..u;;;us•.. :.;40, wer-s :r:ily have ~r:-·.:-.1.1 i~ -:~,~ tex~ -~=-S Durin5 ~~vise1 ttet :ttav.·a. after =~~obtr t~~y ~oo t!le ?.3.I. ~i:'-~·1er t~:r~u:;h ~, 't:' ... /"t -~ ...... ~gla:1d e.s eo~ld ::~ssa~~s. f:-::i-. E .c'-. :Iav;-: :~~7!ces ~r~akiLg tt: ~!7~er in _s:;.ve ~::~-:r~";.",.._-:-: !:~,,.--:-:the ~940, t!:e :nte:.!.i;e:;:?e S-=c";1o:: c·f ::-te :: ..,/ A ccnsi~~~~bl~ o~ ~ec!;~er~! ~~ss- ~<1ve ~een s:',:-··,'1-:--. to ~'!"" .. J • .;. ~~:reri::e:1ts_ :ec':i'.)n. '.:'.. e co!l':-:?::ts :,!' ':~e :-.~ssages =.;pe::..:- of-:: -.. ~..i ~o be tJ."'a ... _, ••,,... "TOT'y -~--•""" .. ·"v~0...r-~ _'ii a-:: .... -~-~-· ., - . . =---" " .... _ -e1··~'-le • \...-g•'?:J :.~f0r4~ t 1.c!'l '!'c:- t~..== e::e:::.:.·. I:- ..:oner~ l ::le :.::af~ic :-.s:111ed by this ~:'cup c:.::':a.!ns i:1~c:-::.a~:.Jn ~~lat:.:1:; to +;~e follov.-:.::"S to~,:::s:- \ 2) 7~".),e:nerlt.s :;~ ~r.i:s.=~:-,.:3 the (4; b-=:t·,;~e:i ':=.._iaC..~ ~nd u.: ..~. :~8cotiatio::~ oet-.-;-'=e:: s::en.t:s !..:: Ar::.:c:::,- anc. fo:- ~uild!~~ ~a~tor!es 1~ ~ht ~.3.~. U.D.~. (5) ~.:.::.P. ::::1for:natio:1 rela"::.7~ to t~e and !"re :r.:e~~~:.cs ::s -s: b:· the :nfor~at:.:>n s..!'l: t:le !'ollc~tl=~ re·~::: ve ·,~ar or~:.::e 1:: ti:ne sc:-.e~ules trar:s::..:. tt~rs. ~rorr. the ~:avy; ci::::'t"ey ~::.e se~::.s t~ conclus:ocs:- (1) The ?.B.I. ~~ve :a~tu~ed t~e Ecst~n :~ensrait·er, a~d instez~ of co~!iscst:.~~ i~, have decided to use it ~or counter-intelli;snee. (2) The W~r Of~ice, ~~e.TalServices ar.d tbe R.C.~.F. tave~been advised ot this co trol aha assuret that t~e oo~trolled traf~ic will not givg out any "1!luable intorr.tition to the enemy. �- 3 - (3) To avoid a;-ousi~~ any su~p:~:~uns :n ~l'!!lany, the traffic wh!~~ is fe~ ttr~~ t=~ s7steE1 is ~ot al~oget~er correc~. ~~wev~~. judging r.. receive:., in!o.r::~t! ~~:,..j !t ~e1T':,rk!.j~ that ~PlS:.1"3 info:-:::~tio~ co~t4ine~ :~ :te n~.4:~erous:y !lee:- t~e tr-..::.t. ~r~::ic !~ ~"':.c..s~~o::~:=:--~::.,;~'"'1'":.:= ?.=.r. i~ :~e ~.z.~. ~s:-'!!.e ~-==""'l.:=;..=s r~;;ardi::; 13 tt~ assurance= _g:~:;:: ~: v-a:-!ous t~.te -:ontrol :~ t!:~ ~ra:-..s=-i!.ters ~:: t::e :- .s •.:.• , o~r :ravy In tell i,:e~r:e. a:: e:- '!ropr,:::;s ~:.e c:;se fo:- a sho~.t; while, !:.275 re-~;~=e-j t~e s~~ey o~ t~e tre~~:c s:~~e t~e :~_:::..:~; ye~~ _j~l. ~Js: ~e~e~t !:i!"Jrnat:~~ ~ece:7a1 ~~on :::e :·a77 te~ds to indie=ite t~at :~:: ":!":.-=i:~;l~te ::~tr::-: by t~e !.?.I., :=6 e ~gn~srous t~~n. ~en t!1e tra~~:.~ ::=..::.1!e~ ::s .ess'..l..11:- t~ou_;h t~1; ~:.!.6 close co-v~.ier~tio:-! :~a::'!:: -:~ 7'~e ~7ar -ir.:.t:: ~!":e :-.=.:., t:le '·s.:- ::~!c~ !lsve been ~~:1ti:1ucus._;- !..=~~~=-=;~i:1~ all t~=~~ic a~d se~1i~5 ~u..~erouz !~ ~~ais -,::~. r-?,~;;s~s !':~ ':,11 -::::;ssible ass::::~-c~. :.s ::i ,~'".,er a yee!"'s experie:.~,; ' - :":'! -·::;::-k o:'.' ,~.:~~ ::.e ~:;-.-:~-=~.:;e Iri.:ellig-'?~Ce c:~bl!led ::> ~.: •.~. =onito:-_n~ ~~.ci~ities -:-:-e~~=~ ¥:~~i~;s o~ t~e t~~~s~i::Ers ~~::e~ ~:s~~s tc ~ecori ~~!~'".,:7e t: tt:s case::-::e~•~ is :1:; ~-..:as~~-!~· s:~ :~e o~ :~~z ~oll:-~~~ ~c=~=~3 ~out: that ":tr '?.2.:. t~e ~rans~itt~~s !~ ~::-e - ·2; =~ :~:e~ t~ ~vo:: s~s ici:~2 ::.,; :~.:::;::-:::st:c~ '}er::s...,y ::::.~t fJ~ .,... ~=c--=~--.. :;": :' ..i~l :::: ~'..:.:-s.. :.e. 0 7.:e ~r<2r:1~::s, :to :oubt, --;-.:;=-: ::D~ k:::ir:e~-?~ '.:J~ exte:::Siv.:i n-at·1,"cr}: :~ ~.:.;.. =.::-_:t.')r!~g ~zc!li::~s, :ti=~:~~::~:~~: ":.:::!.:. '">~ t~c.~ ~!"!~.. forei;:-: ~:r,.::::~7 ,,,..:·.::-: ~")'t"~ 0 o:-era~~ :. =-~=-:.~c :~ '!) :t tra.~s~itter ::: :--:~ :- .- ..-.... ~:-:- ··:"':~:.e ye~:9 -:.~~ :·.:4: ·:~!::? c~~~!s~~tei. be ~o~clu:~~, the=~~:~~. '}er::a."'ls a~e awa:-e o-.:t•this a.:-e t!:e!.:- ~3e !n!'o~ation ov.~ a1van a;_:e afte:- t~~: ~:+:·.:.::t!.:::: ~=1 t~~= :~ ~!":.:i~ t!:.~ ::¤~- es~a=y corr~ctio~s. '!'tee~~~. t~':?l"e:~re, co~_d be pl~ce in a c~t~~o17 o~ s ~r~c:proc~! coucter-i~tel:!~~=~e~ s7St~~. �- 4 - fro~ the ?.C.M.P. si sta:1ce l!: Yiew c: the ~act •hat ::X;e:.:.:1.ental :s u~:e= definite i:lstructic~s :-ne .:::.r :~!"ice to ::i.:mitor all the trar'~ic ~e=.e.:.s-1 by •~a-Q~~•~e~o-v, ~t is rQn,•05~PQ+~-· :.. ..:.. ..... ..... ..,, v_ ..,_:. ,., _ --~~aco ... c-__ _,...,. b-t::: 1 :':;~a:!.::e: ~=:e Officer i;c ~peri=.s::..: ~- -e-~t: !ln to :-.av~ 2:!Cess ~:: t!'le key to te ~ipher i~ ,:,r::.~:- t-, .:"=.:::.;-::~!"t:=.:· ::e~::a.3~s at ·~e ---:.=..t:.~~ ~:-~!G.::: .:..:. 3~c~::n ---- .,,, ............. ->-;:-:::s~~cr v .. J:i t::e ~~-=.:;.1..:.e?":c:.e... 3..!'..d. ti-::-= i::~e::.·.:..l~s _ _,,. -::Cs t::-:..:i-,::::tte:-s. Suca i:t~orr,atio:i ·.,:.;.::: :: o!" ~e~: ,alue !:: i!:l.:proving t1J.e pr'3ser .. e.z:s:.s~=::~e t: t!:S: ·:ar J~~:c,~ ::.~G. s.t t!:e s~"':e tl.::e "'r:r..;_~:: !'9e!ice :"-~~ ::...:.~~e:- :J.~ :r-rer:tor::: =~:it::.red tc ::_.::.:.~~=-~he ::-:::f~~c. 'Cr),t!e~-the ;rese~t ce::.:.it!.o::s~ -:~!"':'"~,:·1ltt~s -i~e ex,erience1 i~ locsti~g tte fre1~~=:!es ~~c., =-_,: ::--~ J~ ~Ja~fic is te:.~6':'!l:s3~~T'n¤- ke:, t:> the ciphe~ !1as b 0 ~:: :s:.":-:::: to -~e ~:E:7:,~s.:1'.:: t1:o~~5~ the Nar.,r b~ve ~;:--~3: '":"J tt..~n :)'7e'!"" t'::, Ye:" :c the O~fi~e~ i/c =::xre=':..-:=-=-::.:z:. ·-:ec+..!.m:,. ~::.3-,c;::-,<:'l:'.3b!.s to do so i..nless a r":::e=.s;, is :,bts!!ls:. � Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource CDWI (Wireless Interception) Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Identifier An unambiguous reference to the resource within a given context CDWI00072 Source A related resource from which the described resource is derived RG24-C-1, Microfilm reel number: C-8335, File number: 7428-4, vol. 1 (pt. 2), Library and Archives Canada. Title A name given to the resource Letter to Lieutenant-Colonel W.W. Murray, G.S.O. 1 Intelligence from Captain E.M. Drake, O.C. R.C. Signals Experimental Section Date A point or period of time associated with an event in the lifecycle of the resource 10-Apr-41