Atomic Weapons Detection Recognition and Estimation of Yield known by the acronym AWDREY was a desk-mounted automatic detection instrument, located at 13 of the 25 Royal Observer Corps controls, acros
A photograph of an AWDREY display unit taken in situ at the York Cold War Bunker
Awdrey Timing and Logic on display in York
Bomb Power Indicator
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Bomb Power Indicator, also known by the acronym BPI, was an instrument built to detect nuclear explosions and measure the peak overpressure of their blast waves. It was used at the twenty five British
Atomic Weapons Detection Recognition and Estimation of Yield
…responsibility. Simultaneous responses on two or more AWDREY units would identify the explosion as a nuclear strike. ROC post bomb detection instruments (see Bomb Power Indicator) operated by recording the peak overpressure of the blast wave from any nearby nuclear explosion. Any ultra-high-altitude nuclear explosion, designed…
The BPI indicator dial seen on the wall of an underground ROC post during a training exercise