https://declassified.library.utoronto.ca/files/original/e09f6a9b5981a8b383947bf5554bb820.pdf b2e135e8bfd1a44ccb56c2721740bbff PDF Text Text Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a f information HYDRA PROJECT NOTE OF ARRANGEMENTS BETWEEN THE DIRECTORATE ROYAL CANADIAN CORPS OF SIGNALS, CANADIAN ARMY, AND THE DIRECTORATE OF SPECIAL COMMUNICATIONS, GREAT BRITAIN. . REQUIREMENT (a) It is required to instal a Radio Communication link between the United Kingdom and the Dominion of Canada to carry certain Special Government and Diplomatic traffic, amounting immediately to about 150,000 groups each way daily. This figure may be exceeded, and to provide a suitable safety margin, the system should be designed to be capable of expansion up to 400,000 groups daily in case of necessity. (b) The traffic received in England from Canada will ''J •• require to be delivered in the first instance to the ~ following addresses:(i) (ii) The Office of the Canadian High Commissioner. The Dominions Office. (iii) The- United- Kingdom Foreign Office - Diplomatic. (iv) The United Kingdom Foreign Office - Special. The traffic received in Canada from England will require to be delivered to the following addresses:(v) The Department of External Affairs, Ottawa. (vi) Communications Branch, National Research Council. (vii) The United Kingdom High Commissioner, Ottawa. (viii) The British Embassy in Washington. (ix) The British Foreign Office establishments in Nev/ York via a small switching centre in the Passport Control Office. (c) A hundred thousand groups daily will be addressed respectively to (iv) the Foreign Office - Special, and (vi) Communications Branch, National Research Council, the remainder of the groupage being distributed among the other .. 2 \' i i �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a (information - 2 addresses. The traffic, in each of these latter cases, is not likely to exceed the capacity of a single Duplex Teletypewriter line in each instance. ACTION PROPOSED (a) The existing Wireless Station at Oshawa will be handed over to the Canadian Government to be developed for this expanded purpose. The Canadian authorities will take over responsibility for the operation of this station on April 1st, 1947, and "Special Communications" will take over from the Air Ministry in England on the same date. Until the conversion of the Oshawa station is completed, traffic will continue to be carried, without a break, in two unit code as it is at present. The minimum requirement is considered to be 10,000 groups daily each way during the interim conversion period but efforts will be made to exceed this figure by as much as possible with the facilities available. (b) As soon as the necessary conversion can be carried out, it is intended to use five unit teletypewriter code throughout, with an eight way, time division multiplex system with frequency shift keying. The electronic j multiplex equipment is being manufactured in England and I ^—. will be supplied free of charge to the Canadian station as J soon as it is ready. (c) The following frequencies are already allotted to Hydra:VDL 1-5 GFJ 1-5 L ~>, ires' 15,510 KC 14,520 KC 12,000 12,185 9 Z. 1~f$t5$$$ " " £f§40 " " 9<f>3J %\v\i &3=£r£&^%& " 8,175 " 5,990 » 7,470 . " Application for further frequencies that will be required will have to be put through the usual channels but, when an application is sent from Canada to London, it should be marked "Refer to Brigadier Gambier Parry" and, similarly, 0. 3 000236 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a {'information - 3when a request, if from London to Canada, it will be marked "Refer to Director - Royal Canadian Corps of Signals, Canadian Army". (d) In England it is proposed to use the Main receiving station of the Diplomatic Wireless Service at Hanslope, near Bletchley, Bucks, to carry the Service. Two RCA Diversity Receivers are allocated for this purpose, and the necessary line facilities are available to carry the output to a traffic centre in London, where it will be taped, monitored and distributed over short spurs to the various addresses. Control of the English end of the circuit will take place at this Traffic Centre. The transmitting station in England is at Crowborough in Sussex, where two transmitters, capable of radiating up to 100 KW each, are available. It is not proposed actually to use power in excess of 40 KW which, in the English view, is necessary for the Service. It will be noted that facilities are available in England to operate two carriers if this should turn out to be convenient or necessary. LINES It was originally suggested that the two governments concerned should each provide the lines and similar facilities on their respective sides of the Atlantic. This suggestion was made, however, before the requirements could be clearly foreseen, and the question of where the expense should fall in the case of each line must be reviewed when detailed costs and incidences are available. Apart from the question of costs, all lines required in England will be arranged by DSC and all lines in Canada by D of S, Canadian Army. Lines between United Kingdom agencies in the United States and Canada will be arranged by Director - Royal Canadian Corps of Signals, Canadian Army in liaison with Captain H.L. Rowland of British Passport « .. 4 000237 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a {'information Control Office, New York, who will, in general, act as local Liaison between the United Kingdom authorities and the Canadian Army in this connection. Lines required between Oshawa and (vi) Communications Branch, National Research Council, will be discussed with the Director, Communications Branch, National Research Council. 4. GENERAL Any points regarding the general management or technical policy of the "Hydra" circuit, which may arise, will be the subject of direct discussion between the D of S, Canadian Army and the Director, Special Communications, England. 5"2 <-^ - * kfe 000238 f i r i n gs 1 � 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 Hydra 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 HY00017 Title A name given to the resource Hydra Project: Note of Arrangements Between the Directorate, Royal Canadian Corps of Signals, Canadian Army, And the Directorate of Special Communications, Great Britain Date A point or period of time associated with an event in the lifecycle of the resource undated Source A related resource from which the described resource is derived Hydra Communications - Policy, RG24, 1250-36 Vol. 1, Library and Archives Canada (LAC) Creator An entity primarily responsible for making the resource Department of National Defence Rights Information about rights held in and over the resource Canadian Crown Subject The topic of the resource Canadian takeover of Hydra, External Affairs, DND, DWS, DCS, Oshawa Wireless Station Description An account of the resource Detailed report of requirements for communication system between the UK and Canada for special government communication, diplomatic communication. Traffic needs to be received and delivered in the UK to the Canadian High Commission, the Dominions Office, The UK Foreign Office (Diplomatic and Special), and received and delivered in Canada to External Affairs, CBNRC, UK High Commissioner, British Embassy (Washington), British Foreign Office (New York). The wireless station at Oshawa is to be handed over to the Canadian Government. Handover to take place April 1, 1947. Director of Signals of Canadian Army and Director of Special Communications in England to review any technical policy or general management matters. Publisher An entity responsible for making the resource available Canada Declassified Type The nature or genre of the resource Text Format The file format, physical medium, or dimensions of the resource PDF Language A language of the resource en