Tele CHELTENHAM 55321. 

Director, 

N.s.A. 

GOVERNMENT COMMUNICATIONS HEADQUARTERS, 

OAKt.EY,, CHELTF.NHAM, GLOS. 

D00/5.3.30 

8th Febru.aey, 1955. 

·i:;q 3.~(h )(2) 

PL86-36/50 USC 3605 

I have arranged that a. OOHQ technician shall v:l.;itl I at 

the end of this mnth to make tinal arrangement" with the authOritle s there regard.in,~ the siting and installation of our iDte~ception pa.rt;71 which 

will be located atl lf'or a reconnaiaance laating twelve months. 

(LSIB/2/55 of 3rd January, 1955 refers). 

2. You are aware that L.S.I.B, has agreed··~ thef < ·. I request 

forl _ and I now enclose a 

synopsis of the elementary course which it is intended to gj.ve. · ThfG' are, 

I think 7ou will agree, within the limits allowed by Appendix P. It will 

be necessary for our technician to discuss the syllabus with thet I 

authorities on his forthcoming visit, in order to facilitate their selection 

of students, and I would therefore welcome your early comments on the attachment 1 by signal if possible. 

we shall await ur view.a 

/s/ Eric M. Jones 

Director. 

Declassified and approved for release by NSA on 05-14-2014 pursuantto E.O. 1352a 

't~ HAii 

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Introduction. 

1. The programme of training falls into two parts.. Firstly', a syllabus 

of intercept operator training has been designed to cover a course lasting ten 

weeks, and secondly, a shorter course of approxirnatel7 three to_four_weeks, 

has been drawn up to include instruction and practice in the basic principles 

or traffic analysis. 

2. Both courses of instruction have been prepared on the assumption that 

trainees will have a good standard of education, and will alreaey have achieved 

a morse reading speed or 20 to 25 words per minute. It is possible that 

students on the traffic ana'.cyrsis course will have previously graduated from the 

operators course, and the syllabus has allowed for this. 

Interceet Operator Course. 

3. The projected time-table for this course covers a period or ten weeks 

as follows :-

1st week I Moree 

2nd n I Morse, Procedure. 

.3rd II I Morse, Receiver handling; logging; double position working. 

4th n I Receiver handling; logging; double position working. 

5th n I Practical interception; double position working. 

6th n I Practical interception; task cover. 

7th II • • Practical interception; task cover; lTPD slip reading. 8th II I Task cover; I.c.R.; lTPD slip reading. 

9th II t I.c.R.; lTPD slip reading. 

loth a I Single channel T/P. 

4. It will be noted that the greater part ot the course is concerned with 

manipulative skill, and basic operating procedure; to begin with, morse 

instruction will deal with improving copy and knowle~ge of buried letters, at 

gradually' increasing speeds, together with practice on some tl"Pical styles ot 

hand keying e.g. bug keying. Trainees will be required to know the essentials 

ot intemational Q and Z procedure codes with other comm.on signals. At this 

point some preliminar.r lectures will be given on methods or working e.g. 

simplex, complex. 

s. The next phase will include general subjects conceming initial 

receiver handling, method or logging, trattic copy and practice reception ot 

local]¥ generated signals. This will lead to double position working. 

6. At the end or the fourth week, progress should be sufficient for a 

start to be made on the logging or live signals on a general search basis, 

leading to the interception or suitable groups to afford instruction in the 

principles or task cover. 

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EO 3.3(h)(2) 

PL. 86-36/50 USC 3605 

-aEera:r 

7. Cover of I I is practised in \the\ ninth week, 

preceded b,,· some morse slip reading. This will be interspersed\with lectures 

on equipment., (e.g. undulators, various types of bridges). The final week 

will be devoted to 

Traffic Ana.l.ysis Course. 

8. This course, as previous~ stated, has been prepared on the 

assumption that the students will be radio opera~ort.&LuWSJL...llll:J..J..L.-EUD:a....aa.---, 

its aim the im arti or the basic rinci les of 

It will take the following form 1-

First Week. 

1. Methods of working, Net te:nninology. 

2. Exercise in Diagrams and Net terminology. 

3. Factors of Recognition; schedules; frequencies; callsigns; procedure; 

message headings; extenial features of traffic. 

4. Practical logreading; continuities; stages in the approach required to 

produce network reconstruction; records of results. 

Second Week. 

5~ U>greading exercise No. 1. 

6. Callsign recovery exercise (rota system). 

7. Codes and Ciphers; terminology. 

S. Technical Aids to T/A; D/F, RFP, MOA. 

Third Week. 

9. U>greading exercise No. 2. 

10. Callsign recovery exercise (formula system). 

ll. Introduction to Elint. 

12. Review of Aims of T/A: (a) Reconstruction or Networks. 

(b) Production or Intelligence. 

9. The initial subjects dealing with methods or working, and the 

recofding ot results, take the trainees a stage further than that given in 

operator training, and ensure a lmowlege or terminology-. 

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10. The principles of identification from the various factors apparent 

in logs is dealt with by a discussion of frequencies, times or activity, 

types of callsign and procedure used, the message headings and external features 

of traffic. The neep tor continuity or intercept is explained, and variable 

callsign systems are dealt with by examples in the recovery or imaginary rota 

and fornrula types, but the block systems will not be covered in view of the 

advanced state of knowledge required in such cases. However, it is probable 

that some trainees will be acquainted with encoded callsign systems employed 

by our Services in the past, so that some reference may have to be made to 

this type. Procedure will be dealt with on the basis of operating 11 language"1 

and the common-sense approach to the analysis of this subJect will be employed 

to show how identification of continuities can be made by a study of the 

various methods apparent in logs. Message headings and the external features 

of traffic will be used as factors which are likeJ.7 to remain constant in any 

one continuity. 

11. Thia inst:niction is followed by practical logreading, including the 

association of various intercepted stations into groups, and groups into 

networks. Exercises are based on imaginar,r intercepts which will use 

"invented" procedure. Similarl.7, imaginar,r rota and formula callsigns systems 

will form the basis for exercises designed. to demonstrate the approach to 

this problem. 

12. A brief survey will be made of codes and ciphers, to illustrate the 

significance or certain items of procedure and external traffic characteristics. Material for this instruction will be limited to that given in 

publications available- to the general public in Britain and the u.s. 

13. The role ot technical aids in trattic anaJ.7sis will be described 

brief'}¥, together with some information or a general nature on non-communications radio. 

U,. Some live material intercepted by the trainee,s will be used as the 

basis for traffic analysis instruction, but identification will onl.7 be made 

from self evident features i.e. lain-1 a e obvious rocedure s nals • 

EO 3.3(h)(2) 

PL 86-36/50 USC 3605 

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