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Stack light in automated production for in-line quality inspection. Stack lights (also known as signal tower lights, indicator lights, andon lights, warning lights, industrial signal lights, or tower lights) are commonly used on equipment in industrial manufacturing and process control environments to provide visual and audible indicators of a machine's status to machine operators, technicians ...
Red lights are commonly found to be used in urban areas, since it is easier for pilots to spot them from above. White strobes (that flash round the clock) (60 per minute for flashing marking "a unique signal that pilots should interpret as a warning that catenary wires are in the vicinity of the lights") may also be used in urban areas.
Flashing red lights are fitted to the vast majority of police, fire and ambulance vehicles – being used only when the vehicle is stationary to alert other drivers of their presence. [citation needed] 'Rear reds' are also used during large police escorts, with the rearmost vehicle displaying red lights to alert other motorist not to pass ...
Cars in the US only have red tail lights, and no blue lights; a vehicle displaying a red (forward-facing) light (flashing or not) coming towards a driver, or from behind the driver (in rearview mirror) indicates that an official emergency vehicle is coming, requiring the driver to yield, pull off to the side of the road, or otherwise get out of ...
Emergency signal - stop on flashing red (overhead) R10-14b ... Stop on red - yield on flashing red after stop. R10-24 Bicycle push button for green light. R10-25
A "dumb" ETD can be as simple as a red flag attached to the coupler on the last car of the train, whereas "smart" devices monitor functions such as brake line pressure and accidental separation of the train using a motion sensor, functions that were previously monitored by a crew in the caboose. [1]
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An annunciator panel, also known in some aircraft as the Centralized Warning Panel (CWP) or Caution Advisory Panel (CAP), is a group of lights used as a central indicator of status of equipment or systems in an aircraft, industrial process, building or other installation.
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