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High-G, energy-sustaining turn. Head/head on (USAF) Target with an aspect of 160 to 180 degrees. (Naval) Target with an aspect of 0 to 20 degrees. Heads up Alert of an activity of interest. Heavy A group or package known to contain three or more entities. High Between 25,000 and 40,000 ft (7,600 and 12,200 m) above mean sea level (MSL). Hit(s)
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 ...
In bi-directional data transfer buses, two opposing unidirectional strobes can be sent from each device. Often the strobe is free running in this case. That is, the strobe continues to toggle whether there is data being transferred or not. Another variation is the sharing of the same bus to transfer the strobe.
Shape and colour of sign types Sign type [1] Meaning Colour (per ISO 3864-4) [7] Shape [7] Example Prohibition sign: Must not do: Red: Circle with diagonal line: No open flame Mandatory sign: Must do: Blue: Circle: Use hearing protection Warning sign: Warn of hazard: Yellow: Equilateral triangle with rounded corners: Explosive materials Safe ...
This sign is a blue square board with a white St Andrew's cross on it (or a yellow board with a black cross, if provided in conjunction with a temporary speed restriction). With mechanical signalling, the AWS system was installed only at distant signals but, with multi-aspect signalling, it is fitted at all main line signals.
In one common alarm sequence, the light in a window will flash and a bell or horn will sound to attract the operator's attention when the alarm condition is detected. The operator can silence the alarm with a button, and the window will remain lit as long as the process is in the alarm state.
A Simplex-brand fire alarm bell. A fire alarm notification appliance is an active fire protection component of a fire alarm system.A notification appliance may use audible, visible, or other stimuli to alert the occupants of a fire or other emergency condition requiring action.
A high-intensity white strobe is used on structures that are taller than 700 feet (210 meters). These lights provide the highest visibility both day and night. Unlike a medium strobe, a high-intensity strobe does not provide 360° coverage; this requires the use of at least 3 high strobes at each level.
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