30 Jun 1964: Alerts Black Box

In this letter, P.D. Smith (Director, Royal Canadian Corps of Signals) assures W.J. Sharpe (Deputy Director, Diplomatic Wireless Service) that the new Alerts message handling procedure without the “black box” is simpler and more “foolproof.” Instead of Alerts traffic leaving the STRAD, it will instead stay in the STRAD, and a supervisor will be alerted to an Alerts message by way of a lit lamp. The supervisor then flips a switch, and sends the Alerts messages on to London and Washington.

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Hydra Communications - Policy, RG24, 1250-36 Vol. 2, Library and Archives Canada (LAC)