16 February 1960: Emergency Power Supplies

As a response to the outage of the Alerts circuit, W.E. Grant (Royal Canadian Corps of Signals) requested information on the back-up power facilities in the United Kingdom, which R.L. Mathews (Attache, British Embassy, Washington) provided.

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Hydra Communications - Policy, RG24, 1250-36 Vol. 1, Library and Archives Canada (LAC)