Signalling Disaster



Established as a method of transmitting urgent warnings and instructions during war, semaphore requires only two signallers to send and receive messages and can operate across wide distances when electronic systems have failed or are not available. 


Signalling Disaster employed semaphore as a visually powerful device to communicate across and above urban space. Drawing on the language of risk assessment, the rooftop signallers transmitted a coded warning of unstable structures and imminent but unspecified collapse.