Transatlantic Communications Hydra
subject: Emergency planning, Emergency communications, Telex, transatlantic cables, radio communications, teletype lines, Tripartite Alerts
description: Series of correspondence forwarded by M.H. Webber to Commanding Officer, Ottawa Wireless Station, copies to Head of Communication Division, Department of External Affairs, CBNRC, HQ CFCS, 701 Comms Sqn, 705 Comms Sqn. Bulk of correspondence is between Alan Routledge, Foreign Office UK and P.D. Smith, D Sigs, pertaining to transatlantic cable facilities used for Tripartite Alerts traffic and teletype conversations between 10 Downing Street and the White House. Webber recommends that Alerts messages be transmitted by Telex if DND 11922 circuit and HF radio fails. Should DND 11920 fail (the White House/10 Downing Street teletype circuit), any other means available should be used to establish White House/10 Downing link.
creator: Department of National Defence
source: Fixed Communications - Hydra Telegraph Relay System - Relocation of Hydra - Plans and Policy, RG24, S-2723-2, Vol. 1, Library and Archives Canada (LAC)
publisher: Canada Declassified
date: 08/13/1965
rights: Canadian Crown
format: PDF
language: en
type: Text