05 November 1963: STRAD Black Box

Canadian army engineers also devised a method for special messages – such as Alerts messages – to bypass the STRAD entirely. In this telegram, T.W. Barnes (Sigs 2A) informs Major Watson that a special message indicator can be used to bypass the automatic system.

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