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Steady green Cleared to land: Cleared for takeoff: Cleared to cross, proceed or go Flashing green Return for landing: Cleared to taxi: Not applicable Steady red Give way to other aircraft and continue circling: STOP: STOP Flashing red Airport unsafe, do not land: Taxi clear of the runway in use: Clear the taxiway/runway Alternating red and green
The basic signal consists of flashing red lights, a crossbuck and an alarm (either a bell, a speaker that mimics a bell sound or an electronic siren), attached to a mast. At most crossings, the signals will activate about 30 seconds before the train arrives but there are sensors measuring speed so that the crossing knows when to activate; so ...
The Cygnus displays a flashing red light on the port side of the vessel, a flashing green on the starboard side of the vessel, two flashing white lights on the top and one flashing yellow on the bottom side of the fuselage. [citation needed] The SpaceX Dragon and Dragon 2 spacecraft also feature a flashing strobe along with red and green lights.
It has the appearance of flashing off, rather than flashing on. Like a flashing light, it can be used for a single occulting light that exhibits only a single period of darkness or the periods of darkness can be grouped and repeated at regular intervals (abbreviated "Oc"), a group (Oc(3)) or a composite group (Oc(2+1)).
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 ...
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Another resident, Edvard Jensen, was more dismissive, telling DR that he didn’t believe Trump would invade Greenland. “He just wants the attention, and now he has it.”
A rainbow is a decomposition of white light into all of the spectral colors. Laser beams are monochromatic light, thereby exhibiting spectral colors. A spectral color is a color that is evoked by monochromatic light, i.e. either a spectral line with a single wavelength or frequency of light in the visible spectrum, or a relatively narrow spectral band (e.g. lasers).