USCIB: 29.17/18 

MBMORANDUM FOR THE MEMBERS OF USCIB: 

Subject: COMINT Relations with D 

28 February 1955 

EO 3.3 (h) (ff PL 86-36/50 USC 3605 

References: (a) USCIB 29.17/13 of 31 January 1955. 

(b) USCIB 29.17/15 of 14 February 1955. 

(c) USCIB '211:17/16 of 15 February 1955. 

1. Further to the decision of USCIB at its 112th meeting with 

regard to r~erence (a), USCIBEC has considered the matter in the light 

of the discussion at the 112th meeting of USCIB and other available 

factors. 

2. USCIBEC has also taken note of the below stated unanimous 

technical opinion on the material listed in reference (a) and of the U.K. 

views received in answer to reference (b) as set forth in reference (c). 

3. Referring to the enclosure with reference (a) it is the 

unaninlous opinion of the technical advisors available to USCIBEC through 

the Army, Navy, Air Force, NSA and CIA and of the members of USCIBEC 

themselves that: 

a. The AN/APR 9 equipments listed in item 3(a) of reference (a) 

are prinlarily EI.INT but do have limited CCMINT uses. They are currently 

in critical short.supply in the U.S. and those that are available are 

being monopolized as a high priority item in the ELINT effort. 

b. The SKL chain amplifiers listed in item 3(b) of reference (a) 

may be used for either ELINT or CCMINT, principally the latter. They 

are an unclassified item available commercially. 

c. The Signal Generators listed in item 3(c) fall in the same 

category as the AN/APR 9 Receivers listed in item 3(a). They are in fact 

test devices for maintenance of the AN/APR 9 Receiver. 

d. The Kay Sonograph (item 3(d)) is a commercial item used 

eJ!itensively for either ELINT or CCMINT purposes. 

e. The Clark VHF Receivers listed in item 3(e) are used extensively for both ELINT and COMINT. They can be made available, but not 

immediately. 

f. The SCR-291 HF /DF equipments listed in item 3(f) are solely 

COMINT items and are now considered obsolete in the U.S. They are also 

unavailable. More modem equipment, such as the AN/CRD-2A, is understood 

to be available. It is considered appropriate to off er a substitute under 

the circumstances and the AN/CRD-2A is considered suitable for that purpose. 

uscrB: 29 .17 /1s n:AHBH!i 1•'IA eOMIN'l' etMNNELB eNLY 

Declassified and approved for release by NSA on 05-01-2014 pursuantto E.O. 1352a 

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USCIB: 29.17/lS 

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RE ID:A 60561 e 

Subject: CCMINT Relations with I ... __ __. 

2S February 1955 

EO 3 . 3 ( h) ( 2 ) 

PL 86-36/50 USC 3605 

4. From the evidence available it appears to USCIBEC that those of 

the equipments listed which are prima.rily of an ELINT nature (items 3(a) 

and 3(c)J but do have limite~ uses are, in the first place, 

probably not intended by thel___J for COMINT use and, in the second 

place, are not the best equipments to satisfy the COMINT uses to which 

they might be put. Further these equipments are in critical short supply 

in the U.S. In this connection, USCIBEC is advised that the AN/APR 4 

or its Navy shipborne counterpart the RDO and SPR-2 is a better equipment 

for decimetric commUriications search and could be more easily made available though probably not in the quantity requested. 

5. USCIBEC is therefore of the opinion that USCIB should not undertake to try to supply any of the items listed in paragraphs 3(a) and 3(c) 

of the enclosure with reference (a). 

6. USCIBEC !eels that USCIB should be as frank as possible with LSIB 

on this matter. 

7. It is therefore recoJIDnended that a message as set forth in the 

enclosure herewith be sent to SUSLO, London for delivery to the Chairman, 

LSIB from the Chainnan, USCIB in reply to the enclosure with reference (a). 

S. If there is no objection by the close of business Tuesday, 

S March 1955, the enclosed message will be considered approved. 

~closure 

a/s 

USCIB: 29.17/lS - 2 -

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~:1A.6056tl 

'f OP ffi!iGH:l!H' 

FRCM: 

TO : 

INFO: 

EXECUTIVE SECRETARY 

SUSLO, LONDON 

DIRNSA 

DRAFT 

PLEASE PASS THE FOLLOWING TO THE CHAIRMAN, LSIB FROM THE CHAIRMAN, USClB: 

1. USCIB has careful]Jr considered the list of equipments contained in your 

Secretary's note of 21 January 1955 (LSIB/28/55) and has asked that the 

comments set torth below be conveyed to your Board. 

2. USCIB is prepared to provide items 3(B), (D) and (E) as listed. Item 

3(E) is, however, not current]Jr on hand. The Director, NSA has been 

directed to arrange for procurement and delivery of these items and will, 

if it is agreeable to you, handle the matter direct]Jr with the Director, 

EO 3 . 3 ( h) ( 2 ) 

GCHQ. PL 86-36/50 use 3605 

3. Item (F), the SCR-291 HF/DF equipments, is unavailable and is, as you 

are no doubt aware, considered by/our people to be obsolete. Was there a 

particular reason why l .... __ .... lr~quested this? We believe we could obtain 

AN/CRD-2A 1s for them if acceptable in place of the SCR-291. 

4. Items 3(A) and 3(C), the AN/APR 9 receivers and the signal generators, 

are in critical short supply and their use has been for all practical 

purposes pre-empted as a high priority item for current ELINT requirements. 

USCIB therefore cannot undertake to supp]Jr those items. 

5. However, to the extent that ELINT equipment needed for COlUNT search 

is involved in Item 3(A) of your list, USCIB can obtain for you a limited 

quantity of AN/APR-4 equipments (or its U.S. Navy shipborne counterpart 

the RDO and SPR-2) as more suitable for UHF communications search, if they 

are necessary to successful COMINT negotiations, even though these are 

also in short supp]Jr. 

Enclosure with USCIB 29.17/lB dtd 28 Feb 1955. 

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REF ID:A60561- 'EO 3.3(h) (2) 

PL 86-36/50 USC 3605 

DRAFT 

6. While we wish to do everything possible to prevent any disruption of' 

UK.USA CWt.INT negotiations with the._I __ _,,~··we must again point out that 

USCIB has no cognizance in the ELINT .field. USCIB therefore is not in 

position to divert ELINT equipment .from U.S. ELINT use or to arrange 

discontinuance of' direct U.S. approaches/to l .... __ .... f on ELINT matters. 

7. USCIB is in.formed that the U.S. already has well advanced arrangements 

to supply ELINT equipment to I .... __ _.!in return f'or l ... ___ I ELINT and that 

GCHQ is aware of' these arrangements which commenced in the spring .or 1954 

and are continuing. 

S. Your comments would be appreciated. 

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