1ST MARINE DIVISION - SAR - ANNEX V SIGNAL - SEPTEMBER 1950 - OCTOBER 1950 · 2012-01-17 · 1ST MARINE DIVISION - SPECIAL ACTION REPORT - ANNEX V SIGNAL - SEPTEMBER 1950 - OCTOBER

1ST MARINE DIVISION - SPECIAL ACTION REPORT - ANNEX V SIGNAL - SEPTEMBER 1950 - OCTOBER 1950

Korean War

Korean War Project Record: USMC-73

CD: 01

United States Marine Corps History Division

Quantico, Virginia

Records: United States Marine Corps

Unit Name: 1st Marine Division

Depository: National Archives and Records Administration

Location: College Park, Maryland

Editor: Hal Barker

Korean War Project

P.O. Box 180190

Dallas, TX 75218-0190

http://www.koreanwar.org

Korean War Project USMC-00100391DECLASSIFIED

2295 10/ls

•NNEX VlCT(h :to' l.ST Ml.hJl!E JJIVJSION Sll!OlhL •CTIO!l ly;;Rl<T

fdvision Si[nal Otfioo Hunc;nam, KO)roa Z1 Novombor, 19.50

From• Too

:fua !Jivision Sii:n•l Otficor, lst )>!arino TJJ.vision, FMF,(R•inf) Tho Comman.din~ Gu;noral, l.$t JJarino IJivisicn

Subj r S!Jocial Jo oticn I\.al>ot't !or por1od ~9 .hue ~0 - 7 Oct 50

Roft (a) fdvision G11noral Ordor No, l,

l. INl!cC[,UQTION

nus special aoticn repOTt lJote forth the oporations of sienal com­murJ.oa tion of tha division. Curine the LJ.Ci1.nn-SGcul a porn tim. !t cl;Co.Ja not includo detailed operations o£ aubordinuto unit1a comm.unioutiQOs. 'l'hoso rrily 00 found in tho Spacial Jiction ItolJorts vf thu units C{mc.ornod, Exporionce Gnin<Jd nrd vroblems onc,JUntoroc1 ttr(;J axvl.nimd. hvcor.rMmda.­tions aro ffi<."<do raeardinr; tho conduct oi !utw-o sicnal oommunicn.ti._.n oporntiuns WICrJr sind.l.ur concliticns.

3. fi<ELI!J:N.l.Y PI...Nl!l!!G

Tho !JivSJ..,O arrived at H•noda •ir !laso, Tol<,yo1 Japan, on l91>uc50, in Cotlpt\ny with the odvaneo ocholon of tho Uivisi'-in starr. This erwp ir.lf.lOdia tel.y procaed.od to tho Mt Mcl{inlay # .hGQ-7; whoro it o.rnbarkad :~nd proparvd £or thu vJJtrudng phase. Tho objaotivo aroa d.iecloso::t and also tho prospocU.vo sizo and compolitioo. of tho L't.lillhlbicus !oroos. L.i.J'lisc:n was :IJninldiatoJ.y osta blishod with tho l'lae Oatlll1U"Iica tion O£fioor 1 001.1-PPJ:B'lf<~U l.., Tf'.is o!!'icor,. who wae te.mi,l!ar with o.x!etir.c; plane, w~c most gooperat.ivo and holpful. J.d(lquato epaco waa i)rovidod in tho Flar, Oommwll.cati<lfl" O!!ioo tor tho Landine Foro• Si~n>l O!!ioor1 s sootion, Liaisun wa1 also (;ISteblishod with thO OommWlication Officur, ~WE, ~mel with varioJ.tS o!fiC..lf'S in t,hq Si:.;r.l{j,l C.t'1'1w ot c:wCFE. Tr,o !iivSi.:;O was introduct.od to Gul1u:ral l::$B.Ok~ Sicnal. Ot!icur for CINon:. 'I'ho ux-1stonco and location of tho Spuo:ll>l l'laml.ro Start, lator thO X Corps Staff, was lanrnud. Oontact was .Dildo with the Sit;nlll Sgctivn of this stan· .. <1rt' copi<Js <Ji: tlw lstU'J.rtJiv Colllli.lWlioation Standine OJ>Jrati~ Proooduro l•nd Si~nal Oporation Instructions woro t.ivon to thie stai'i'.

lst MarUiv oOllllnuniontion roqlliremnts wero !1ltdo kntmn to thu Spucial Planning Stat!, Froquonoios 1 tolo!Jhono citouit numbors, wiro !l>;:<;in;; eodos, pyrot.oohnic si~nals, switahboord oodu nt.m::.a nn:l a host of othrJr items woro inoluood, Tha Spooial Pl.annl.ng Stat! had to ouurdinato uur raqQirg.m~nts \Jith t.huso o:t: tho X Corps ttoadquartora find tha ?th Infantry Diviaion, l'revioosl,y, blook assis,;nmonta o! !roquoncios end o>ll signs hod boon made by Gl.l'OI'E to ~ndor1 Expodit1onar;y Foroa, and co;,r..nroc•r Exvodi tiooary Troops,

In viow of thJ oxtrolllOl.y short tilro avoilablo !or pl.onninc, it nocossary that all planning botwoon .tho Speoi•l 1i'l.annin6 Start nne: our hea.dquartors bo eoncurront. Thr,t thia w~s accom.PlishilC. is ctomonstrntod by tbo £act thut tho lat{.{arniv Sitnal. Opurat,l.orw Instruotiuns .:Sild tho X Oor1Ja SOl wora promuleated on tho aa100 data •

.hll froquonoius which cuuld bo ueod for tho SCh :;oo end SCf1.5)6 wara authorized for v~r uso. J. .tnirly llbvral o.ssicnmcmt ot !raquond.gs in the 11F/HF rang~ wns also mada. ~&cloquato nur.!DoJr of i'To:quoncios for tho Sili. .500 and 600 sories radio sots woro modo available to this div­iaion. It mil~ht bo wall t.u nl(;lntion that tho Spocinl Pl.ann.ing Staff considered that tho lst.Unl'Liv1 as tho J.saault Forco,_ was civan priority for thfl nssii!JliOOnt o! !raqu>.Jna:ius. · No particular attention was _[j\id to JJ.NAP l9S in trequancy allocation tor tha l.llndin,_; Foroo.

: .. '

DKCLASSIFJF:D

Korean War Project USMC-00100392DECLASSIFIED

2;!95 lO/le

for tho division "oro loft cs •·••11:nod 1n tho ap..

Thtl Signl\1 COLt!luniontion J\nno~, nnnox ITHH1 to thQ Oper~·tiu:1 Ordor for tho ~ruphibious assault was also proparoct. 'fhb ~.nnox difforod fror.~. tho typo of r,nnox J.~ropnrud i'or raoro normal tyi.xJ& of t..aaault l<;tTift',S• Tho l'#lC03Gity for prcvidin{; for Qnrly OOITail.u.nio:.tions Wit&~ ti-.:1 BLT ffiilk­in& tho 1£\nd.inl} on \•OllU..OO, nne! tl"P possibility o! tha oarly arrival of th:l 7th l.~rinos in tho objoctivo .:'!rue. aro exer.~pl.os.

i1ll of tho plnnning tor-- thJ opoN1.ticn Yi?.& accompllalVJd of nucr.HHll.VY bot"Woen tho poricxl 20 ku~uat lind 4 Suptambar,. 'l'hie was dooo by tho DivSig01 tho ~saistnnt DivSifl{l who nrrivod in l'okyo on 21 .I.1J8ust, and ono cl.ork. Complotod pl.e.n is set forth in Annox I'IEJ..; to 0f(l. 0 2-50.

Rui'oronoo m:t.t>Jria.l. to f:lid in planni.n(; waa at a m1nimwn. bocauso or tho nooossity for cuttinn down on woit;ht for thiJ trip by t\ir. No cvn .. tact with subordinnta W'lita was possibla boforo thoir c,rrivo.l ?.t Kobo, Japun,

Pl~a !or ochulonr1¥Jnt ashoro at th\J obju-ct.ivo aroa woro nado. It was ducidv<.l that tho Co.r.v.nm1c:-.tion Pl~ttoonJ let Provisional1iarino Bri­cacto, shoulG aat <'.s tho first .Jchalon ot tho Uivision S~nul Company to l••nd. By in!orr.><l rur,\orar<la to the Briuudo Sit,n&l Of!icor, instructions woro t;iwn on tho prarnieos to taoillt~to his plnns for lOCiding. His ro­quosts for infornation lloro harttlocl, in tho sar.\O tnRnnor! Instruction!:! a.ffact3JlG tOO pl.Un for uml:>Rrkation "'•rG m:..C.o a vnil.ablo to tho 00 lst Sit;Mlllll upon his •rriv<>l ut Kobo, ·rho porsonnol <.nd oquipm>nt to ~~·ko up tho soJcon:! ooholon nod rvar oc:hoalon of Si[..nal Ccnu:lnn;:; ~.:. wall hB tho porsOfl_r:.ol f,nd equipmo..Flt to bo emt:Lrkod on tho i.:t ..:o.ItiJ.ll.ay wcra sot i':.Jrtl~ tor this officer.

Tho \Hf t.N:. .• uuncy 1Jlf\Jl promulc;atod by tho N<..vy for o.tir-cround oon<­tii.l.t.ic<~tions nooaasit<ltvc~ SOi.:.U ch.:mgG Li tho frvquanciua hitho.rto usat\ by tbia division, Consoquuntly, ~yattll~ !or .-Njvr~.o-l c<.ncl Ett'i rr\dio sots had to bo distributod ,,ftor tho arrivel o! tho liivSit;Sup) at Kobo, Sooo crystn.la WJN obt(tin(Jd throut;h Nllvy ohRnnala J,;rior to this. Dis­t.:d.l:nJ.tim hF~d to 00 J.t1du not. only to diviaion w1it15 at Kobo but ~11so to units of th:l lst Prov n~r bric;; Rt Pl.\san.

Oua to tho pilrt.ieular typo ot opc.rnUon f. shoro 1 it was (,mcrurnl.J<::Int. up­on tno Ol.Vl.Sl.on t.o obtr.l.n certain oquifl!lont. i'X'OJ:l hX'Iey sour cos. nddit:ion­al fiold wira hnd SClt-19) r.:;dio sots woro tho principal iWr:lB•

~lhilo in Tolcyo, 1nquirios woro modo l•S to the allowanoo of hogistorod Publicaticne to 00 tnkon !'!ehoro ut thiJ objoc~ve area. No suocuss wr~s oncountered in obtsinine this in!orm?.ticn. Finelly, Ylhila E•t Kobo, thv Jtssistant I1ivision Slfll Of!icor W:'\5 aant to .H$nP.hC in Tol(Jto by tr:'lin in an attempt to procuro nucoslK\ry cryptonraphic divices~ Somo_, tut not ::..11 of tJ.,oso woro obt.-'1inuc!.. Sie;rod Oodine tinehines \'IE:IN fiMll.y roc::oiVIJd utter arrival ut tho oDjuotivo nrea.. Tho W1vy al.Ass 5 ollou­Rnca wue .novar tnk .. m ashoro at Inchon, but l<BS turnud ovvr to tho OJ.stiX!ian o£. r~o~storoO. Publlce.tic.:ns,; 001!f'H!OO!t1J l 1 !or !urthcr dis­positi((l.

Jt vory iruportant pnrt of tiJJ pl.annine pha.so ·uas th<J rap);; conlillnt of th~J divisicu ataf.i' avotion ~~i~\.,~i.n tho "GI} to ur.a<'11:Jlu thum to opurato efficiently durint,. th<J ahip-to-ahoro movorront.. Thu loct..tion of existing OOIIUilUliO?.tion fRcilitiCJS hns fi r;raFtt deal of inflUOnCIJ Oil th080 locaticns • .t.lso thu oaao 'hitA. Which stt:f'f of!'io..,rs cuul..d contact onoh othor wns con­Slaorod. Tha nccom.p:.•nyine; cha;rt incacl<tc:;us thoso loc::·tions •s woll as in­tarnal :o.nd tJ%torn~l. cona;lw1icnticn .fHcilitios C.V&iL.o.;blo.., Onl..y rac!io nets which woro orJOratad by tho st~.ff or.t'icors uru shown • .a i'iol.d tolophono

2

DECLASSIFIED

Korean War Project USMC-00100393

•

DECLASSIFIED

i '

DIV NGF NET I .J. -- I JOINT OPS

t I>RTY l\.CTIOI<L -----· ~I" NET

-1 I I DIV MSG Ul!,l:j

LJ c-__j I I OqNT COMI.!

J..-___ _r-F----~J...I ____ -l, (~hl.!l: OPS Rll)

Dineram showing Internal ilonmunioati<rls ~bOI'.r<l tho uss Mt lJcKinlor (•Go-7).

DECLASSIFIED

DECLASSIFIED

Korean War Project USMC-00100394

i'!U'I <• -,,, .,_ oor~~Jt.n~nn.1

DECLASSIFIED

~295 lO/ls

syston was inst<.'\llod which ccnsistod of a BD-72 switchboard.- i1':"ll0 wir<;~ 1 and !iold tolophonos E!!I-J, Stuff offic~Jrs havinf; tulophonas on this sy­stao c.ro indioatod on tho chnrt.

4. TI;;.IJI.Il~G 4•N:; l..FlU~.I&lS

Thoro was no prollirl.n!1ry tr<\ininc; ~n thu .::ivlsion luvwl, Only sr.n+I­unit traininG v.=ns possii.Jlo prior to this oparation, Coi.V!tun:i.ootion ulo~ .monts ot tho .Bri::;:t~do woru th<J only on<H3 which hutl oOL:.t&t ~CJ)'ione.o. Units which arrivod frOI:l thJ Unitud Statas hhcl boon h~lStily oreanizod and oqqippocl, Onl.Y tho most rudimont.Rry trein1nc was possible for thoso units. Tho SiJlal ComJb,ny h<•d n<Jvor trainud as a unit, This orr,al).izn!"' tion w~s .r:.tlda up of' poraonnol from tho 2ncU~er!Jiv, lstJ·Iar:;iv1 lstfrovt..;ur bri£;ad~;~j and Orcanizod h.osarvo.s nawly coroo on activo duty, l~ny mvn ) had noJvor soon thoir Plt;toon Laadar.s boforo thoy cauo asho;ro nt Inchoor

Two JPJ.tiio drills 'hure hold at Kobo be!oro diJpO.rturo pri .. .a.rily !or .: tho purposo of calibratinG radio sets. 1\l:dio sots abonrd tho lit I~cKinlor \~ura oporat.od with t.hosa of. t.M let L~~rinas 1 llth t:..'1rin\Js 1 :-.nQ lst 'fUnk Bn,

Units dicl conduct trai..nin[, in !HI'ili.l.i(\rizine oorru,lUI'li.Oittion pllrsonnvl With CXX:SOPl sor-z .. provisions of thu .Si!·,C*.l Cow:.unio:.tion ;.nnux to tho Operation OIT.ur, cod<3S 1 t:nd t~uthGnticntore whilo unrouW to tho objoc ... ti vo r:raa •

.S• L(h!JING ;.J,;_, E;;B,.I~

nll oor.~ru.unicati(,ll units of tho division woro 10£.Gud for tho ~r.tphib­io'JS l<•n<lin:; at uithor Kobo or Pu._sa.n.. As stt.t~Jd r.L:ovo, tho Si:..;nal Company, 't'l.:':s for tho m.ost r:x1rtJ1 loadod ltt Kobo. 'rhu Bri[}\d\J Oocii:LlUlic: l:.L .. ll Platoon, which wns considured as tho let (;IChalon of Si.:_-a:l Conp'\ny <;ur­inG thu £\ssc.~ult J..anCir~;, nas loadod at Pusan.

lnstructions woro i;i. von to tho 00 ~at Sicnt.l Bn to l01•d pvrsonnol of his Bn to conforr,\ to tho following plnnl,

!!!fl. :!'Qhl..

l<i'·diO Plt 1-79 lliro Plt l-<:iO liseConPl t 4-60 BriG Hq Si~h llq Corpshad&Uiro.Tn.s ~rrPlt Si,Co Hq Cori•Sll.o!ITIWB __

.5-219

_ •G0-7

0-l7 D-4 J-15

l-1

lST EGi (.:;c)

o-26 0..30 o-~ 4 .. 2

21m EGi ;!jJJ ECH

l-~6 0-10 l-31 0-15 0-13 0-5

0-12 1-20 o-70 l-4 l-12

l-12 1,.-lll 2-lZ

Tho 1st Eoholon, owr which tho Sit; Bn h<~d no cont.rol at thu tiJ.!U1 w<-~s loadud a.boord tho USS 03-valiar, ThoJ Si.:.tn<Jl Supply <.n~ Wbintunt~ncu j>lJ.toon was lc<.dod on toto ><ith tho third ooholcn. Subsoquont to thoso instructions it was f()und nvo.Jss,-try to load tho Uorps hv_pair ToUJ:,-.s on shippin;; >~hich brought the 7th lll•rinos to tho objoctivo •roa. ~oto arrival o£ tbosa teams at Kobu ~ tho oauao of thia.

4

DECLASSIFIED

Korean War Project USMC-00100395

"

DECLASSIFIIW

~5 10/l.B

Tho second ocholon o£ Sil;n:•l Companf was orclorod nshora during tho afternoon of )J plus l. Most of this ochalon l' ndud at Yellow Boach durinr, hieh t.idu am r<;~po.rtcd at tho I.Jivitd.on Coroml'\n::l. Post by 1900;.

Tho .hN/'I!d}•-4 t.orminal of t.ha Q:Lrriar Platoon was installod «nd >~ithin one and a hal! hours ast.!>blishod r<•dio rolAy COIIIIlllliliOOti<n with OOlWHll~GRU 1,. ... rtor t.hosa ch.Cnnols woro opora:ti.vo 1 vary lit.tlo traffic wr,s trensndttod by radio, This was tho J:tost ralioblo ahip-to-shoro conmunica ticns omployod1

\1hilo tho :avision Qor.II!J-IJld Po:st ~t~s loot.t.od &t Inchon tho cldvf probloro was k•apine in >tiro cor..-,,uniontioo "ith tho infr:ntry rugil:\anta, r;isplnca.mont or ;rog.LTLG.ntal OF 1 g Oii\6 60 :rapid th<:\t ir:;. n;,C.ny OD.GUii full conu:umiOEttions was not ostt~!Jlishlld forwnrd bo£vro displ{...cor.~ont. It was tho rulu rotho:r:· thBn thll oxt>Jption that wiro OOJnl:,wU.cstiqJ wont out wbonevor rugimonte.l oomr~nct posts disFlJ:ccd.. Initir:..lly a wiro t.<lar.l w<..s c:.ttachoi'Jd to only thv 1st L~rlw s, On D plus 2 e wiro toam was nlso atta.chod to tho 5th IJarinos to easist in nt.int.:.dning uiro linus to tho rt~eiJnonts, Th1.1 norl!)9l amount o! trou.bloJ shooting wcei nocossury duu to broaka in linos cLIUSGd by v~o~hicl.Js and somotimas natiVGB•

"!'Mia col:\IUUnia ... tions Vlhilo at tho first IJivisicn Conman<! Post wora much improvucl ovor tho ship.-tc-shoro phasa, Tho rvduoud amount of in­tor!tlronCo to rucoption v1as distinctly noticoabla. .i1ll racli{• not.s opor[;tud n\...rr.:i ... lly1 and comr,!Wlicntd.on VJ<'lS oonstf<ntl.y mnir1tainod by radio with s ubordina to orr,aniza tionllio

Tho Simol Compony, durine tho first tow cta~s oshoro, wcs oblo to 11 shako dovmn ror.lflrkabl.y fr.st, Baarintt in r..ind tl¥J i'nc.t that Sienal Coror*-llY h:.d nuvor oporc.tod EtS ~ wrl.t, this o:reaniv:tion v;as undor "" distinct handic-fl.p., !n spito o:r tfl.i!; OO!:l-.To'!.l.l.'lio<-·.tiona VhJ!''J Qontim10ll$ly provided to subordinato wdta whidt war..J movine rapidly ovar a wido front.

On the 19th of Sol;tcmbor t..1-:o !Jiviai:.n Oc;;:;,r,n:;, ;>ost di.:p~ced to tho vicinity of Kimpo i,irfiold (Ti. 0656T), Tho day boforo, tho •ron was recollr.\oitrod by tho .nLIC, Si~dll O(t'ioor 1 .iiSS't ~lJ Hoadqunrtors Comrl)9.ndnnt, .nnd sovoral offiooi·S from Si .. ~nal }3!:tttallon. Nornal oOLvn­uniorttione oonaistinr; oi wiru and rnc.U.o vm.s tJf;tl.blia:hud to su.bor-din~it.il

units. r~adio rcaly we.s installsd and oporr,tod betwatb diTbion nnd ... ~. On 20 Suptur.lhor thu first "Qarriar Joapu was aont to tho let

Liarinos to jorovido a signlo .duplox channol of voico communioation, This systeJn was oparutod cnJ,y durine daylight hours initially duo to tho noise causud by tho accoro:)!lnyJns I'Eo-75. Tho foll..,ins day a noarriar Juup" was &Qnt to thl'l llth L.it:.:rinos, ThG third 11 ()1rrior JoOtJ11

wu sont to tho 5th Linrinoo. on 22 Soptumbor, '!hu 7th '"'rir>Ja roouivud R .lbrrior Jaeo on tho noxt de,y. 8<J~ lt:r LtOol ~lb()rt. Oroal to aJC. ser ~sa., of. .w October l95D, !or dosoription of tho lll}.rrior Joap" systol!l •.

Bo~tidos thQ nor!!lBl !::lOJ!Y!flnr: nots; fu.not.icn~l .radio nats !or th" G-3: G-2, o.nd G-4 woru omployud, 'l'ho :W0 isti<>'ll Control Not. was kopt in operation ruainl.y to provido' ·,,U rapid l:l.uans of cor.wunication i'ron G-4 to a> ls t Shoru f<.rty Bn, who "'"" on tho boach at Inehori, Tho ~NftliiC-S Ite.dic Sots u::od by tho C-2 and C-3 l'lt!l'O not !h'1tirel.y antisfeotory duo to tho distAncos to roeir.wnts ond tho hilly tarroin somutilliOo en­countorod botwoon sta tiona. '

~Hi8if1EO 7

· __ ·.• ... . . . :

DECLASSIFIED

Korean War Project USMC-00100396DECLASSIFIED

2295 10/ls

.,max Br.kor to Opn Plan J•SO VIas prcrnulgatod on 22 Soptomb<Jr l9SO.

!Jurine tho poriod whan tho );ivision Oomm:·.n:I Post was locatod no~.r Ki..mpo J.irfiiJld~ Conunand Poats of toost subordina.to Wlits W<;~ro widoly disporsod nnd wiro communiouticn was oxtramoly d1f!icult to install and nilinthin. Tho lfiro Platoon ot Si(,rAl Company was Uut;m(Jntod by wiramJn !rom Shoro farty ToNUs and two offiours, \Viroman woro also obtninod from personnol oarriod on thrJ rolls o£ tho 09rriGr Platoon. ThroUBh out tho ontirv division n,Jj>rOxiJJ>,toly 200 milos of wiro was la.yiJd par day durine opGrations from Inohon to S~Joul. SubsJquont to this timo tho Nquiraant !or wiro dooroa.sud as ro£~ir.1onts sl.&okonod 1:aoo1 ~tt tM and of thu £irst wuak of oporativna tho supply of wiro in div- · ision dwnps was praoti~lly niland roquost was madu on X Our~JS for supply, X Corps ordarod about JOO milos nown in froc1 Ja1:t1n out of whioh this division rocoiv"d about 265 mil<>s,

Units aorosa tho Han l~vor wura connootad to tho division wiro oyst()Jl) by fiold wiro <.nd by oo-35J (Sp:kal four), Both typos ot wiro sarvud satisfactorily so long as thay woro not cut by l.VTI s t<'1king supplio.a across thu riv\Jr. lliro was Jt.id by uso of en LVl' ~·nd was buried on oaoh b'lnk,

On 2C So~Jtombor tho Division Comn"'-nl Post was movud to tho J.r.nw Darracks in Sooul. NornJ.il communications 'ffC.s oato.blishud and in addtion tho Q9.rrior Juop systom was again ornployad to aood advr.ntat:;a, B¥ this systom cor.mwll.~tion was rcaintainod with riJt,;imonts ovor tutr<.1.in t'-nd distAnces which would hava boon prohibitiva had o~ !iold wire ho.;,n oJJ'[.Il.oyod,

•nnax Bakor to Opn Onlor lJ-SO was prorou:I<:atocl on 29 Soptombor 1950!

0, ENEilr

Soo SJXloialJ.ct.ion ho;>ort o! lst Sicn!tl Battslioo,

~0. OCU11EN:I5 oNv lillllli,:ENL.,TIUNS

a, ThroUBhout thie opora.t~on tha Comnanding Officor1 lst Si[;n1l Bat;t.allCl11 asswood oporl,tion control o!. Sig)lAl CorJ._i)!"lny" axcapt !or thv J..iassar:;a ~ntor Pl<~t.uon. 'I'ha Aios.,auo Cantor Plil toon and thG Si~.nal SUiJPl.Y and J,laintonanoo -Platoon wora W'ldor tho diroct oporational control of tha IJiviBion Si...nal Offic<Jr, Plaoine the ~dio and \;ire Platoons undor tho operaUonnl control o! lst Sicnal Bn (via Si'-"al Co) provod unwioldy, Onlvrs from tho Conr.»ndinB Ganornl (liivSJ.;;O) woro delayed in boine oarriod out l1nd JllisintorproWtions froquontly appoarod, Liko­wi!Jo, tho I .. i vSi.:,.>O froctu..JntlY tai.lad to boooma coerdw.nt of tho atl\tus of ao.mmuni.oatiuna dif!i-cultios onoountorad prOffil)tly, Likllwiso, it is estins.ted that too muoh tiold wiro WHB usolossly laid booauso of tho <'tolay ot intorminc; tha •iiro Platoon ot tho ovorchanuinc aituntivn. lt is rOCOtllliOndod that in futuro oporations tho Bi(lllUl COOliJ!I!lY l•ith aU ot its neanoioa of ·com.municntioos bo 'undor thtJ diruct oparationnl control o! tha !Jivioicn Si:.nal Offioor, Tho Si(Jlal Battalion hoad­quartors shwld bo rosr;onsiblo only tor thoJ logisti~ support of tho Ba ttal.ion.

b. Radio

(l) Lergor radio sots th<•n tho currontly •uthorizod ~N/~11\c-6 radio sets aro roquirod for onch infantry roGirr~nt whan disparsod oporati .. ns of this typo oro undoitakon, r.oco-nd raclio sots SCR-399 or Selt-193 bo authorizod.,

(2) I\.S.dio Sots scr-..-619 usinc wot call bn-ttorios aro unsatis­f'clctory. sac-6l0 with dry battorios aro muoh suporior bocauso o£ liehtor woibht nnd l•ck of battory <F•reing i'rob~om tor i'ront. lin• unite. ·

~f1ED G

DECLASSIFIED

Korean War Project USMC-00100397

•

DECLASSIFIED

22>5 10/ls

(3) i~dio Sots scr~-536 WON !or tho roost iJ&rt WlSat.isfFtctory booausa of tho limitod 1•ane~ of thasa sots.. PJ..:~toons pra!urrod Selt­)00's duo to tho distances covorod by cmoh plJltoon• hocomwnd. a hand pnok sot in th> IJHF r<•n~o with eroator (XJWOr bo ~do avail.Oblo for platoons.

(4} Hooornr.;an:l hadio Sot SCR-399 inoludo a Truck 2i '1'-&'Ct as o oomponont J=B.rt thoroo.t' • .ttutho:"ization o! additional Sll~.-)9') 1 s croat.:ls a shortage _of transportJ:tion within tho usinc;: Wlit Wldor oxistine conditions.

(5) Navnl Gunfiro Toams roquiro raclio sots ~N/VhOo-1 to provido loncor ranee aor.:auniOE,tion for shi,p-to-shoro nnd also 1Jrovida a doponcl..,. ~blo ~i' ohonnol for spottin(; naval Gllllliro with hiGh jX!rforr.l!lnCO airarn!'t.

a._ Uira

(l.) ~ lr•rLO proportion c! ~assault WiN to Fiuld. ~liro was used in tb.is oprJration thnn au;thorizcd by t.ltu 'table 1".1! .<.ll01:?8.'1COS• J:l!uost equal amounts wero issuod t•J unita by tho T1ivision Si.,nal Supply Offioor. hocummond t'i-1.30 and ~·t-llO ba authorizod on an oqu&l l:asis. J.lso rooor.unon:l roploniehinont rata for an oporation bo basad on tho ~i'll"'lf SUfi' ~~nue.l1 n.t l0l=-.5J ra.thor th.c..n the ~rina Cor~Ja :Vo• Ex .. porion co of this division indioa.tod tMt tho roqlQ.rom•mtB for fiuld wiro indiO:<tod in 'Ili lOl.-5 aro ossontial.l,y oorroot, .t.bout 200 ml.los per day of wiro was used dUl'in::..; thu ralJid r.tovoOJJnt !rom Inchun to tho Han fdvor ..

(2) ~n invaluable supplomont to !iold wiro in this oporaticn was tl¥3 tlQirrior loop" omployine J.N/'mc-l uquipr.xlQ.t' I'uoor:uxond a !<8dio l'oloy Plll.taon bo r.>'do an orconic f"l't of tho Si_ncl 00r.1pany with equiprmnt nacosoory to furniah commw;dOfltion to !our roei.r.lanta from divioion hoadquartors •.

(J) Tho Radio l<ol.By Platoon has also boon indiajX!nsablo, In this oparati<Kl. it assist9d in prcvidinc; co.r.wunioation botwoon Oorps and !Jivisian, It is ruoor .. m:mdod that suoh a pl..lltoon bo providod tor any U<~rino Corps or~e.n.tze.tion of r~,~:iimontal size am J.areor v1h3n sent to a "Comb!lt ai-aa tO operoto undor othar than t:ar~no Ool'.PS control,.:·

d. MPssaeo Contor

(l) OryptoeraphiO aids usad in this OjX!r<,tion aro indioatod in Sil;nal Qonvnunioation lonnoxos for tho opplicnblo poriodr !ho eJ.aripg doficioncy notod was tho lEl ck ot n rapid, so cure CJ";Ypto-dovico. CSF-1500 wae authorized !or use by thO X C.orrls; but !\.leu..rity cf thia sy­stom is oonsidorud to be nil. PJ.O G is mora socuro but1 likG all code books, is slow to uao, liost divisiol)lll taoticnl traffic, thoro­£ora, in this· operation was tranemittod in tho cloa.r or .t:nodifiod plain lAneu~~& amployirl{; radio call ai(;:'.B fer ur.ito da3i&~o.t!cn:::: D.nd Sht1oklo Oiph~r P.t~O 6 for munorals.

( <} Oonsiclorobl,u dif!ioul.ty waa e"i"Jrionood in routine traffic to iiiiil:tC und 0thur hit;hor h~adquartors throueh thu J.rrrzy CommurJ.oat:ton systom. . EntirfJl,y too mmy moeS(I.eos wora dolay~d for day::~ or lost altogethor. Tho outetandine O):ll.mple. of this \'J&s casualty h.el10rts. noo01..,nd a soparato naVIll oirouit bo ost!lblisllod for hl•n:ll1118 puroly admin.lstrativo traffic ix;twoan Marino Oor,,,s units jn the field nnl tho noarest NoVIll!illdio Station, In this opol''tion it """ found Wit in ~ny oasos Marino Cor.ps traffic, whon not. lost1 wns dolayoc! boonusQ o! hieh prooodonoos aaeienod ~rfllll ndministrativo trR.tic. Oj>orational .Imrnodiata And uvon Etl!lreoncy was assignGd antiroly tO? often as procodunco !or ndminbtze.tiw traffio. b7· othc.r than ~lnrino ()>rps wU.tll'o

9

DECLASSIFIED

Korean War Project USMC-00100398DECLASSIFIIW

a. Sicnal Supply nnd hopai-r

2295 10/J..s

( 1) lbo Gror.tost los sOn lo: rnod UurJ,.O[; this o_p;Jrati...n by this pl.P.t..;.on \OC\s tho noud for mobillty on thll p&rt o! ai,:::.nnl SUl!ply and ropr:'lir platoon. Fortunntol.y this plntoon was F.b].Q to fiCCDI:IJ)lish its mission by an nu::.;r.> .. mtation of nn r~rfi\Y sicnal r•J1J<dr du'V•chmfJnt. 'Ihis dotaohmont oonsistod o! two rndio ro!*.ir tontls or·.oh \lith a rop•ir tru* and a sf.-ara l.'t>.rts truck; ono toloph<..nJJ :r'Ql:!!ir to·Dn f>..lso had th'3 sar.to aquiJT:l(Jnt. hddod to this v1oro tWQ splro J...<·rts trnil.Jrs carrioU b¥ t.bct eiunul supply ancJ. J;IAintonanco plP. toon which wvrg nuthorizod abovo tho T/lo by tho Cor.n;nd:nt bo!oro dop8rturo o! this division !rol') Q..'l..;.,p P<;ndloton. It !G rocof." .. 'Uond.::~d. tJ·..at the oq,uipf.l.;mt ::;m.:..?.;re.tcd bo= low ba authorized a division to biJ c.onu:d.ttod tv si.rrd.lfo.r oporat.icns in tho futuro. It is nocvssn:ry to havo olootronio spa.ro rt~rts rondil.Y occaasl'lbl<J durint; op~Jr<.ti~·.na. This o<.1nnot be r.ocor.1plishod by oporatine; out of boxes or B(.).5 chrast.a. i ,portion of tho rap::•ir soctiun r.~uat bo r.1;)b1lo in ordur to cot tC'l roJeimunta to c:·.ccorupllsh ro;.aira. Thora is no requ1,_nt for the !'#chino Sho,p trailer, In this opor"tion it was usod as a carry-all,

(2) Th<J ~llmmnco of technical orJ.iat.oc~ porsonnol for this platocu was in soma oasoa i'oWld to bo inHloquP.t.o. Tho roUowin,-; list is rocommondod as ndoquato and ahwlC. ba nu.thorizod en tho Tablos ot Or~anization.

(a) Si:_nal suwl,y So oticua

W!!l. 1dQ§. ~

US~t :l034 l "'Q"+- 30;1 1 ...... .._,. SS~t ;l03). l sset 3033 l Sgt ;l03l 2 t!> ••• 'll"''l':l l .... ~ ... .., ...... ,.~ Cj>l 3031 4 OJ?l 3033 2

Pvt/P!o 3000 l2

(b) Si'"n"~ U•intonanco Sootionl

liol:!K l!OS NUl.illEf< ~.

___,__ !.iSct 21><.9 ... IJ.S,;t 2619 4 USt;t <6:l9 0

TSd 2619 0 TSGt 2639 l SSct 2611 3 SS:,.t 2663 0 SS_st 2636 3 SS~;t 2631 0 SS!!t 2631 0 SS[;t 2633 0 ·Q~+. 21>45 0 -~~

set 26J.l l2 set 266~ 0 set 2636 ' ""' 2631 0 WbO

S~t 2661 0 S,;;t 2633 0 S~t 264S 0 C!Jl ")l.'!ll.. 0 -"-'v Pfo 2636 0 Pfo 2600 3 Of~ ~?~ 0

lP

DECLASSIFIED

Korean War Project USMC-00100399DECLASSIFIED

2295 10/ls

(;I) Throu.()lout tho lattor stagos of tho operation thoro VKtS

no supply of linosMn'.s pliors, i'ricticn te.po. or field mossago books .. Thoso vwro gonor"l supply itorns t'.nd not stockod "by tho !Jivision Si(.nol Supply o·rrictJr. It is roCOLifl .. ».mdud tll\ t tho so itor.1s1 "Hhich. aro u~od by oorllffiUOiontions pOraonnol, ba classod &s sic~l BUl-'l>lY• Tha Jtl'JilY carrios tholsa itoms,. with the oxcoption of. mossa~:;o books, as Si~nnl 1toms1 cruatinc; <"n a.not~'"tlous sitU(;t.ion.· Our t;onCJral suvply o!tio.a roquisiticuod t.huso itmns !rom lt.rl1l/l siGO•l suppzy,

~ LllERl' CREH

.NNEX VI~"l'Ch TO l.S'l' U..I.!JIV LIVISlctl SFECL.L oCTION liEf<l,T

ll

.. -

DECLASSIFIED