r 

REF~ I~ :A70894z ~ I • .I 

' 1 i c.~ ;. ? I ~-o 

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eclassified and approved for release by NSA on 06-03-2014 

ursuant to E.O. 13526 
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REF ID:A70894 

COPY NO~ 19 

7 February 1950 

• 

JOINT COMMUNICATIONS-ELECTRONICS COMMITTEE 

JOINT MILITARY CHARACTERISTICS 

FOR AN INTEGRATED AIR NAVIGATION AND 

TRAFFIC CONTROL SYSTEM WITHIN THE CONTROL ZONE 

Note by th~ Secretaries 

The enclosure,(J/.AN 19/4) a report approved by the Joint Aids 

to Navigation Panel is forwarded fer coordination to the 111embers 

of the Joint Warning and Target Infornat1on Panel, Joint Counterceasures Panel, Joint Communications Equipment ?anel and the Joint 

Frequency Allocation Panel. 

W. H. BihCH 

Secretary, Joint 

Countermeasures Panel 

Secretary, Communications 

Equipment Panel 

'W. R. JOY 

Secretary, Warning and Target Information Panel 

Secretary, Frequency Allocation 

Panel 
I 

I 

REF ID:A70894 

ftE5l'RI0!!D 

E N e L; a . .8 u .. R E 

JOINT MlLl~ARY CHARACTERISTICS 

FOR AN INTEGRATED AIR NAVIGATION AfifD 

THAFFIC CONTROL SYSTEM WIT"rlIN TliE CONTROL ZONE 

Re,ort by the Joint Aids to Navigetlon ~anel 

THE PROBLEl\i 

1. To adopt joint ciili tary roquirer..tE::nts and charactcrist'lcs 

• for an intGgrated system of air navigation, traffic control, ' 

approach and landins witn1n the control zonG. 

FACTS BEA...qING ON Th"E PROBLEM 

2. Military air operations require an expcditicug sol~tion 

to the probluc of op~ration of tactical 3nd transport aircraft 

under all conditions of visibil!ty. At the ;resent ti~o no 

joint t1ilitary Characteristics .:ixist for a. Erysten t. 0.~ will 

solve t~is problen. 

3. Tht systec cuet be dc~~gried to acc0Mcodatc all types of 

military aircraft, including thoso whose s'::laoo li1nite.tions wi11 

not permit the inntallation of oqui'Otl'l~nt ~qusl to tho )r~sent 

allowDncc. In view of limiting space, weight, and aerodyr~~~ic 

factors, the airborne cquip":t.nt must 1m:;>03(,, minimur.1 d'~tri?..ient 

to aircraft porformance, the prioar1 burden beill.E, ~laced upon 

the su~face installations. 

4. T~c. system must 111-oet :rili.tar7 socurity roquirc.tr.Jcnt.s in 

ordGr thc.t tno equipcient tfill o.;, of maxi.11Ul"l service 'CC friendly 

aircraft and of Irinimum s...:rvicc to an enemy. 't'!lo S't.'lSCeT'ltibility 

to enemy c01mtcrn.easures "111st b& "11...ld to a minimlJll'l. 

5. Tha gt.noral re:.quirom1:1nts for navigat:1 on, conrm.'L.'lic .. 1tions 

and traffic control a~ply ali~~ to o~crations"of aircraft 

carriers end air bases, and lt is osscntiel that tachniq~es 

and prcceduroa be coord.1Il3.tcd for the caxi~ur.i s~anda.rdization. 

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REF ID:A70894 

~ ~t~ Air Navl~~t1on ~e~clopmcnt Board (ANDB) is 9roscntly ;ro-

.}~c.ding: with the dovclo·.nncnt of a 11 conr.io11 s7stc.ll'I" of navi;e:c1rmal 

aios desii:;::iod to rnec.t civil and non•'liocticc.l M1.lita.ry r.v.:t. .. tic:n. 

requircacnts fer tr~ffic control nnd air n3vigatjon. It appears , 

that thG orig1r...al cc.ince:;>t. of t!i.o "cocinon systoli1 11 will not f1.1 lfill 

~ertain wilitary roquire~~nts. 

DI8CUSSION 

7. D1ocuss1on .and assutn:?tions 11re ccntaim;d. in Appcmdi.x "D". 

CONCLUSIONS 

, ~- M1litcry aircraft will b~ roquir~d to 02crat~ ur.1.der 311 conditions of weather. An integrated syatec of navisation, traffic 

control, u!)l'roacb, a.T"J.d la.."l.ding a.:!.ds nust bc"dc..volo:.x,d and mado 

opGrationc.J baforc all-woathor ~ir o,cration ca~ bccocc an actuality. Sue~ a ayst&m is not now availnbl~. 

9. An~9 "co,.,..:non systel"l11 ado:JtGd bJ t'1o United States fli.·ou.ld 

1cco~modatc cilitary cpc~ations, h0wovcr, the ava1lcb111ty cf a 

_ aatJ.sfactorJ military ~Jstotll sho1.1ld not bu d~lc:~~rcd :pcndirl,b tho intogration r.nd de>,1clopmont or a fu.llJ satisractor~' "co7'1~on sys-ctm". 

10. Boc~uou th~ requirement for all-weather flight is v1tel to 

~11 types cf ~ilitary o;~rat1ons, Lnu priority of tnio dovcloJmont 

should be d~tart'linbd by the Joint ChiLfS cf s~arf as D~~rorriatc 

'to the miosion conccrnGd. 

RECOtraMENDATI01'!S 

ll. T!let th~ joint "rlilitar"r cha.ract~ristics as contai11c.d in 

Ap~ondix 11A11 bo ap::;>roved. 

12. That t~c a~proved Mil~tary characteristics e.nd s~~~orting 

ataff st1Jdy bv tran.smitted to t!la Cbairr.:ian, R(:;;seerc~ and Dcvulopment Board for ap~ro~riate rcscarc~ a~d dove1opmen~ action, to the 

' 

s~rvic~s for infor11ation and guidance a~d the C~airman, Air Faviga- ~ 

tion D~valo:>mcnt Board for information. 

if.BB'fRIO'fBB -2-
,. REF ID:A70894 

· 1;. T~at the di..velrY-,r1cnt and ov:iluation of t!lc. necee3e.rv cle-r•onts 

f thic Sjstcn he ~roe~cuted with tno ~ome ~riority es ot~cr 033Cn-

.. ial rcquirt.:nonts or air d&fic.noc e~ ."lnti .. s1.a.br.1a.1"'::i..nc warfare. 

coo:ID±NATIOK 

11~.. Coordination with the ,Joint Warning ~nd Target Int"orr.mtion 

1snel, the Col..111tcrmeas.ures PcJ.::icl, t~..:i CorJmun1.cations Eqt:.i;:>£J.cn.t Panel I 

'"nd the Fr"'quency Allocatio11 Pc.n.:il is d.GGmod n~ccsad.ry • .. 

. . 

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REF ID:A70894 

APPElWIX. I II A •• 

.. 

r .. 

I - G'!N!RAL INFORMATION 

1. Obicct1ve. 

~· To ~rov1do a moans for the continuous sate and efficient 

covcmont of air traffic within tho control zone ~ndcr all conditions 

of visibilit~. The basic systec of atds shall vr~vidc cor.!llunication, . navigation nnd traffic control. 

b. Tbe follow1IJ6 o~crationel rcqu1re~c~ts aust be satisfic.d - to accomplish the ~tatoe obiectivc: 

(1) T~o syotom shall, inaofar as :racticabl~, deny service or countorrnoasurca to tho onc~y, ar.ad not bo subject tv intorf&rcnco, either natural er 

11llllln i!lD.do 11 • 

(2l Thu system shall ~c ada,t~~lo, insofar as is practi-

... c·e.blc, to both carrier and land bnso opcra.tion. 

(3) Thr, s;{stcm shall ;rovidc f'ol .. tho safe, orderly and 

cxp~ditious flow or air traffic throUf.~out th~ controlled zong, and 

shall be such tha~ it ia ~ocsible for t~o aircraft to bL ~..aviGated, 

without visual rcfcrt.11cc to the. gr01uid, ovc..r all ""\orticns or the 

route includil'.lf: ta.kc-off o.nf.. l~ndin.~· 

(l:) The s7stet!l "3he.11 ;irovid.~ a l.:mdi11g re.tc.. of at lC>ast 

two aircraft ~or ru.~wcr por rnin~t~. 

(5~ Be rc~dily .1..ntogratc.d wit~ t~o air dcf(.11sc r(.,q11iru-

'Donts. 

(6) The syst&~ s~all ~rovido for the inmcdiat~ &~change 

of ;ortin~nt navig~tion a~.d control int~ll13encc throughout tnc 

controll~d zouc. 

(7) Thc... systcrn shall hJrovidD co11plc,tc autoriatic traf.fic 

control, wit_: ~rov1s1on fo~ oithor autor1atic or canucl fliaht. The. 

around "Portion gf t!lo systc'i1 shall be capable of llUlnt,ol O"J€.ru.tion 

whe:.n required. 

( 2) Provide a rninir!lur.:i sir.r.J.1 tencous con trcl ce.;io.c::. t. :• of 

5i aiI\11.,nos, end a de.~ircd c1r::o.ci tJ of 300 a1r:rle.nes. 

REB'filIO'fBD -4-
' . REF ID:A70894 

i:ESmRI0'l'EB 

(9) The sround portion of' the. aystcn1 at a. !)articular 

install~tion cuat be cajable of O?Grationc:.1 control fro~ a s11'lbl~ 

location. 

(10) Configur~tion of th~ ground com~ononts will b~ 

ada,ted to fixed, portable, shi~board or air transportable versions 

as rcquirc..d. 

(11) The system shall yrovide to tho ~ilot contlnuous 

1ndicatibn of distanco and azi~tt~ froc a sclbctcd £OOf>ra9hical I 

point' in t~o controlled zone. 

• (12) The system shall -pe.rr..1it uso of any o.p....ratioI"..ally 

dusirablc tr.nclc within the control zone. 

(13) T~e system shall osornto ta an altitud~ of at least 

50,000 feet; and must have a radial coverage of 100 nilcs at line 

of sight. 

( 14) Thb systc.m shc.11 b·~ cai:io.blc of o?cration in all 

parts of .t~c world. 

'\ 

2. Pro~oa~d Service Emuloym(nt. 

~· !:iata.llations will be .J.t:ilizcd st t'he following: 

(1) Air basoc, with cp~l1cablo portions apprcpriatc..ly 

sited witcin the control zone. 

(2) Aircraft carriers or ~end~rs, with a~~lica~le portions in s~)~orting ~easels. 

(3) The airb~rne portton of thu system ahall be ca~able 

of installation in all ty}uS of r.tilitr•ry 13.ircraft. 

b. Int~rna.l 'location of aqui)~ont: 

(!) Adequately protocted spac~ for control operat~ons 

in a d&signa.tpd control cunt~~· 

(2) - Equi)ment end antenna lo ca ti one 1~s roquj r.;,d tor 

s~tisfactcry ryerformanc~. 

(,:,) A11 .. bornc cot::1l)onents a.vailablG for pilot control 'lnd 

diep:'.ay. 

:; . Tho syat&~ ahall ~rovid~ fo~ th~ following functions: I 

~· Pri~ar7 functions. 

ftES'!'Rie'fEfJ -5-
• I 

REF ID:A70894 

(l} ~ 

A~tomntid id~ntif1cntion. tracking, sequencing, 

S?acing ~nd dircctic:i of fli~~t pct...1 for ~11 aircrBft w~thin th~ 

cont.rolled zo:ic. , (2) Tho sys tcm shall be oe.::>~t:llc of prov1 din~; c. continPo'l:.8 . and ex~~a1t~o~s tr~ck control fron any dcair~d ,oiut in the control 

zonL to ~he com;lction of la:iding roll. 

(3) The systcc shall p~ovido a means o: onabllng aircraf't 

• 

to pro~epd GX~cditioualy to their oarkinr; aron or to t~L tak~-ofr . runuay under conditiQns of' low viaibili"Cy. 

( 1q A\,tor.iatically cor..trolling tho flight "1.:!. th of dc9arting aircraft through the departure ~rca. 

, (5) Automat"lc control c-r itissod a:)f)roachcs • . 

(5) The Dystcm shall ~rovido surv~i.Jlanco of the approach 

path to insu.L"'o safcity, and shall .!:"Jrovide precJse app1"oach path 

guidance tc aircra.t',t without full eqt11 9m.:..nt. 

(7) Th£, aystc..m shall ::;>rovido for the ir:imodi.atc cxcho.nge ., 

or intollib~nco taroughout thw controllad zone. 

(?) Ttc sy~tom shall provide to the ~ilot ~ont1nuoue 

indicatl.on or distancr:. and 1?.Zin:.uth ~rom a scloct..;d goor::.ra.:;>hical 

point in trc controll~d zone. 

b. Sccondqry functions. 

(1) BG r~odily integrated with the air dcfLnao r~quiromcnts. 

(2) The ayst~r. shall ~~ capable 0f ext~noioh by installii;:ig addi t1011al surface uni ts and intcrconnocting cori1:l1tmication 

chc IUlC 1 s . 

(3) Maxi~uc oceurity ns ro~crds obtaini~..g of ~ntcllJscnco froi' tn..J sys tee by tho cn€-n~', or .enemy countcra ... anurcs. 

' 

( 4 ~ V11ximum emplo'Ylllont of il}."Sto.llat1oua ar..cJ tiquf:>HJcnts 

?rcviously ryrovidLd for tectic~l JurJoscs. 

4. Ge~cral 

~· In Dn All Weather Oparation it is cons1~~rcc necessary 

that air oJ~rations, both co~bct end transport, be conducted with 

-6-
REF ID:A70894 

Bl:S'l'~ICTl!ip 

a rna.~inn.,~ d~gr~o of nafct7 arl.d e~~icifnc1 under all conditions of 

visibility. A ~r~roquio~te to safe and afficiont all weather o~crction is tho ~i~eat degree of instru.t:lont flis~t ~ro~ic1cncy and 

judgrmnt on the !)art of tho pilot. NcvortholcaR, in order to ~andll. 

' 

larsc nUl!lbers ot eircr~ft end to permit them to land uxpudjtiously 

under ccnditiono o~ low v1s1biljty and coiljng, automct1c features 

are considGrc.d necessary • 

.e,. The o Jcrational ~n,loj'!llont of co.mbc.t aircraf'tJ 9a.rticulerly in tho initial phase of any f~turo war, mey require t~o cT.ccutjaa 

of combat mies1ons to tho mnAi~lum tactical radiua of tho aircraft 

Gonccrncd. This noana that Bircraft returning to base will not 

- hnvo an apvrocidble a~ount or rasorva fual. Landings must be accom-

~lishcd , as cx~cditiousl7 aa the accoJtanc~ rate of tho rrnway o~ 

runways will ,emit, regardless of' visibility. In ord~z· to do this, 

' preciso timing is n~cvasary to ~stablish desired landjng intervals 'not only on the final a~9roac~ path, but czt~.ndins into tho , control area as far as nec&ssarJ. 

S· The moat hazardous and difficult flJ.Sht conditions are 

encountered in the control zone includ.~ng the a~~roacn and.landing~ 

The ccmb1nat1on of' poor waath~r conditions and high traffic donsity 

nultiplios these difficulties ~nd hazards. No sati3factory solution has boon found. to tho ~roblorn or short diatanco navigetion, 

traffic control, and landing during all WLath~r and hi~~ traffic 

dLna~ty conditions. 

5. Availability Date. 

,g,. A 'rosont and continuine; n&cd CY.ists tor this sys~cm, 

end un~il sto~a are tek~n to ~rovido such a systc~ the ce,nbil!ty 

of nir o~~rations is reduc~d intolerably during ~eriods of low 

vis1b~lity. It is not expected that the system will be dov~lo;cd 

in one stor to its cocpl~tc form, since op~rationa.l ~x~orjcnco and 

dovclo;conta in associated fi~lds will pcrnit pariodic inorovoccnt 

in accur~c,, minimum visibility, traffic handlin~ caJacit1 and . 

landlng intorvnl. To sjocif'y a da to for tht. coI?1-plcte SJstcrn is 

11'''1T"oo.listic, therefore, rcaLarc •. and dvvclo":.mcnt of oxi.sting <..qui?-

. 

_RBB'l'RIC'±@ -,_ 

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REF ID:A70894 

~~nt should JC ccnti~uous l:ntil ~light o,crations can be conC.~ctec 

wit"iout rc~c.rd to WC<'thcr condl.t.Lons. 

II - OPERATIONAL CrtA..iACTEltIS~ICS 

1. Fregucn~; coverage. 

!l • As rcqu.1rt.d. 

12.· Che.nncl roquircaonts o.s neccsso.ry. 

2. Enmi&Dion as required. 

3. Ran..~~ es required. · 

~ 

4. Sp~tial coverage ~s rvquirc..d. 

5. Minimwi suaci:.ptibility to interference, com;et ... blo "'.L th furi..ctionl':!l ;crf'orm&1c.: standards. 

6. Individu~l ~lane idcntific~tion ~E rcqv1rcd. 

1. Stability ~s required. 

8. Rcsol"t;.tion a:p.d d:tscrim1natio:!l a.s re.quired. 

9. Accuracy !lnd fidcli ty as. rc..qui1•cd • 

. 10. Elihllc:r, ins of or as f't.asi.!:>lc, tha oqui'9?:1Cnt installed in the 

'a.ircr.:ift as r.:quirr...d by its ni~.ion .. Su;>:plcncnt.c.:-7 functions shall 

be accon":)liaht.d by snrface 1=.tsta.llud LQUiJ!Tlc11t to the.. no.=illlU.m extt.nt 

practicable. 

!!.!.. - PHXSICAL O!WlAC'l'ERISTICS 

l. Any dutrimont to aircraft ?~rformanc~, ceusod ~y inctallat1on of tho systo~s comJcncnts, shall be held to a m1nit1UI'J. Configuratiort of tnc Ground·cocponcnts will he adapted to ftzcd, portabl£, 

ehi~board or air transportablo versions a~ required. 

2. Arri:m.gc.,mont and coordino.t1011 of cOt'lpom:.nt uni ts es roquircd: 

3. Provision to o~vratc wit~ currently offectivL con"'IU.~ication 

systcl"I. 

ll. Power su:;-pl.: a.a roquirc.d. 

5. Maximu"" .. ;ra.ctico.blo ste.nc:i.ardization. 

6. Constz•uction cb.aractcristics ll.3 a_:>"?ro:;>riatc.: to ;ur .o~~.J of 

individual co111:;.onont and 0-pt...1 .. ,,.ting location. 

7. ArrN16ot'lcnt of cqui9t1cnt as roqui:rud !'or ,,,oat efficient 

ope.ration. 

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REF ID:A70894 

ftES!'ft!O!!ID 

• 

viC.cd for tasting and ali3nJ.Il8, all airborne systo1"1 C01!l -ior..cr..to. 

Stabilization aa rcq11irc..d. 

l .r, 

"'' Stand.a~d destruction rcauirc~~nts will a)Jl;. 

11. 1·fa.::iu1..m l:i.rl c of l'llinie. tu.rize. tic.-1:-.. tocb.niq".:'c s f' or "irbcrni:. -.:>qui::;>-

ncnt. 

IV • EQ'JIPM.Eli'i1 OPERi1.TION J' .. ND M:..INT~~lANCE CF.AH.'\.CTE.i."1I5.TI_C$ 

1. O•Jorc.ti~ tiuc.. for surface i11atalla tiona cont1n1.c ·s c.:tcc.~ ... t 

for routine '11'1.r:l.ntc.na.ncc ~Jcriods. A1rborn1.. q:por.J.tiil[, til'lo for <li.!rati on of f 1-~ ~ t. 

2. A."iiuatlilE.nts to ':I·~ tna 1111r...::.m,in corr-s:ntibl~ W1"&'1 R:itJafe..ctor:r 

• 

o;it.ration. 

3.Control fc=t~rcs as roqutrod. 

I 5. T~h ... sya tor.• s -:all J.!lccr .:i~'rl' t1..· ..L a.il safo _;rovisic .. ns. 

ind:i ca. tors tel ri l'"'rt ,_,., - i....; .. ~ :=--ilcit ::..11 t"i .. !..V(.nt of c1a.lfunctior1 of the 

7, 0-pti"";'U~. Wf.ll'"...,-UO ti?i!3 to 1u11 r?i:.raticn, 

8. ~!J.nir:mn n11.iibi:...I' ~nd skill of -::.-;.z•s··r.1..'l..--l co":.l;ctib1':. wit1 set.isf~ctory fu.nct1~n1ns. 

,,a~h~ of ~:i:.ntc.!l.D.r..c(. 111 c:i.(; fi.. ld, i.";;"., built "..lJ. t.:.st cqtnpmc..nt, 

~~wcr-on inavf~r as standard cn~ .. inccr1r~ sarctJ, d~dign, and construction .:iractict: will pc.r111it. 
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REF ID:A70894 

HEIB'l'rtI O'l'EID 

APFiENDIX "B" 

, 

ME..NIORANDUM FOR T:Ht CHAIHMAN, RESE/1'IlCE AND DEVELOPMEN':'" BOAlID 

Subject: Joint Milita:r:;r Char~ctcristics for an In"Ccc;rated Air 

. Navi:ation .and Traf J.~j c Control Systcin witl1in the Control 

Zeno. 

Enclosure: Co:;ly of Subject Report. ,,. 

' . Tho cnclosuro was approvGd fur J•oint USE) on by thti 

Joint Communlcetions-Eloctronics Cori.~ittec, and io rorwardod to thEJ 

Committee on Navigation, Roeuarc1 and Devclop111ent Boa.rd, f'or epi:i"opriatc rcsoa1~ch and dovC:tlo-;.Jmc11t acticn. 

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REIB'fRIS'l'E&> 

APPErIDIX II c II 

MEMORANDUM FOR '11~ .SERVICES AND THE CHAIRMAN, AIR NAVIGATION 

DEVEtpPMENT ~OARD. 

Subjoct: Joint Military CharactGristios for an Intcsratcd Air . Navigation and Traffic Control System within tho 

Control Zone 

Enclosure: Co~y of Subject Report. 

l. Tho enclosure was approved for joint uov ____________________ __ 

by the Joint Comrrunications-Elcctro111cs Committee, end is f'orwardcd 

to the s~rvices for information and guidance and to tao C~airman, 

Air Navigation Development Board for information • . 2. A C0)1 of the enclosure is being forwardod to tne Comr:;.lttac \ . \ 

on Navigation, Rosoarch and Development Board, for a,)ropriatc research and dovolo,ccnt ~ction. 

RES'fftie'fBD -11-
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REF ID:A70894 .. 

l 

A'.PJ!J:i;h'DIJ. '']) n 

Diacu'lsion 

l. An air'traffic control syet~m must eat1sr7 two :riaary op~rationa.1 functions: 

~· Maintenance ot safe ao)erct1on bctw~en aircraft. 

J:!• k~~Jcditioue progress of aircraft operating Jn t~e systcM. 

2. Tuctical military air o:pc.rvtions, includi.ag tI'(lining fli£>!'lt.., 

consist basicallj of off-airwayd fl1ghte. ~hosv flights will ~ave, 

random times of arrivul and directions of approach to the control 

zone. A system edLquatc to neat all nilltar7 rcquironcnta rm.st 

accom!'&lodBta such fli,ghts as well as schodulLd ,oint-to-~oint fli~tts. 

The system mvst be capable of ~uTJ.dlin.,,~ aircraft arrivi:nt~ bo~h singly 

and infor.,1at1on. ' 

3. An 1.nmcdieto roquircr1cnt for such, a syct&ni is dl..r::onctrat'od 

beth. in the conduct of tho BcrlJ.ll /1tr Lift a.nd in the conduot of 

tactical tra1njng op~rationa. 

4. Tho c.xocution of comba.t misaiont' will require o·x ration at 

the ma.xirmn ~Jcrforraanc.c of tho aj rcrsf t. conccrn:.d, with tho rosul t 

that roturni11g 3.ircraft will roqt·iro tho u1ost cx:;>cdit..:.oua handling 

within tto control zon~. 

5. Tile. sys tea should provide suff'iciont and c ,::>.;>rC'.::: ri~t .... d.:i. ta 

to ~cr~it cutoc~tic as well aa ~aniu:.1 control of nll aircraft. Manual 

instrum&nt landinE, is a necessary alt&rno.t; to monitorod auto~atio 

I • landing. 

D~1FI1'JIT"ION 

S. Tht. dti'1nit1on fer "cont1•:;l zone" :In Civil Air 1t .... ~ula.ti.on, 

Part 60.'T4 is. c.e follows: 11A.."'l air s::>o.cc of' dLfincd dir.1 cn:::ions de.-

signatcd. by the Administrator oxt.cnd:i,ng upward fr<..,m the ourfoc...: to 

includ~ one or more airports ane. wlthin which rulos additione.l to I 

' those .governing flight in control areas apply for tho )rot ... ct1.·n of 

air ..traffic". 

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REF ID:A70894 

7. Tho above d&finition ts o~su::ic.d,to apply. Th: control z~nc 

may be of any varying size. and stm.~e which can be c:5 rcur1scrib:.d bj 

3. circlo of radius not in cxcc..ss of 100 r.:i:i.lua. Tht.. nu,.,bor and 

rc..lativo location of landinr; areas will vary among control zonos, 

vi th cc.ch landing area; r.quippod to a.cco1·1plish f,t..?o.rato i:n:i tial and 

final ap)rocch control. l 

8. Soc~rity assun)tions are ~s follows: 

• 

~· An Lnomy will be able to intcr~ept end tak~ useful bcari:nes on siGnals in all parts of ,th~ tr~qucncy Q~cctru.1, eithc..r free 

~ircraft or surface installations. Tho use of VHF and U".rlF will . restrict the radius within which t~c ~ncn7 can obtain intelligence 

fron the system 1 s o:Jcration, end within which the encl!lJ may be o.T.-

?tcted to intcrco]t and D/F all t7,CB of siBnala. I 

b. The onom1 will be caJQblo of ~mitting int~rf&rring signals 

:;ff'c..ctivl. to n dc3r&c w.1ich w.111 dc.;;>t.nd upon the distance frol"l tht. 

r&coiving install~tion aoncc~nad, and uoon thv relative nagnitudc 

-:;,f uscft,l and jamming signals. 

~· Tbe location vf fix~d rad1~t1ng olo~onts of th~ syatoI!l 

~annot b•J l:ci.it !'rol!l the en&niy for- an q.xtcns1vo o-pc.rating -:icriC'tl,, 

iut the use cf VEF and higher froqusncioa ~ill r-0quire a more ox-

::Oc.nsivo roconnaisso.ncG on thv ~"'art or the c.ne1~y. 

d. De. .:'ondcnc.o en airborne> o ni.aaions will 71old us-0f11l :!.nfc-r1a tion to a pro~crly cqui?Pvd onorr.y,, thor~by ondangt..rins tho security 

1f' our own aircraf't, and should be kc.pt to a :!iinil!lun1. 

9. The ;r~sontly ~roposcd civji air traffic control SJStcm aay . ~ct m~c.t all security rc..quiroconts, and r.iey not acco~.nodP.to all 

types of tactic~l ~ircrsft at tho re.quired interval. 

10. Areas iim1c.diatcly downwind and u")wiud of ee.c:1 activ:: landing .. ..._ .......... .. ...... -- I 

3tri~ will bo r~served for final a~proach, ~ull-u~,, and dcJ~rtur~ • . 11. Aircr3ft ~ulling u-p from a missed a~proach will rc..quirs a 

,~w P.~prooch with a minimum of dvlay, and will follow a dcsi6na.tcd 

iroc~durc to arrive at a point for rc..s~acing in tho a~proach ~att6rn. 

12. Weather information within thL 3~oroach control area will b~ 

RHB!RIC'fEf) -13-
•• 

REF ID:A70894 

provided tc th~ pilots~ 

13. Man; military aircraft will be. equipped with ci.rbornc.. r~ t1 .. _r, 

IFF, and radio alti~ctcrs. 

14. A s~itablc beacon will be n~ccsaar7 for rader assist &nd 

1dc.ntif1ce.t1on. such bt.acon will b:. a.va1le!blc to su,plcriont otl!cr , 

navigational aids. 

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HEIS'fR!C'l'ErJ