Blip Blip Blip

I've blipped a blipping machine! It is an important historical artefact. It was part of the early warning system in the 1960's. It had a repetitive bleep or blip, which changed to a long bleep if there was an imminent nuclear attack. It was bleeping/blipping during the tour of the Underground bunker at RAF Holmpton in East Yorkshire. Well worth a visit.