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2. Multiway switching - Wikipedia

   en.wikipedia.org/wiki/Multiway_switching

   In contrast to a simple light switch, which is a single pole, single throw (SPST) switch, multiway switching uses switches with one or more additional contacts and two or more wires are run between the switches. When the load is controlled from only two points, single pole, double throw (SPDT) switches are used.

3. Motion detector - Wikipedia

   en.wikipedia.org/wiki/Motion_detector

   A motion detector attached to an outdoor, automatic light. A motion detector is an electrical device that utilizes a sensor to detect nearby motion (motion detection).Such a device is often integrated as a component of a system that automatically performs a task or alerts a user of motion in an area.

4. Sensory illusions in aviation - Wikipedia

   en.wikipedia.org/wiki/Sensory_illusions_in_aviation

   This involves the simultaneous stimulation of two semicircular canals and is associated with a sudden tilting (forward or backwards) of the pilot's head while the aircraft is turning. [10] This can occur when tilting the head down (to look at an approach chart or to write on the knee pad), up (to look at an overhead instrument or switch), or ...

5. Enhanced flight vision system - Wikipedia

   en.wikipedia.org/wiki/Enhanced_flight_vision_system

   A head-up display must be harmonized with the imaging sensors. A head-mounted display moves constantly with the pilot's head, and must therefore be tracked continuously so that the image displayed conforms to the scene in real-time, see Helmet-mounted display. There is an additional issue of lag time between the image and head motion, which ...

6. Switch - Wikipedia

   en.wikipedia.org/wiki/Switch

   Single pole, single throw: One-way: Two-way: A simple on-off switch: The two terminals are either connected together or disconnected from each other. An example is a light switch. SPST-NO. Form A [4] Single pole, single throw, normally open A simple on-off switch. The two terminals are normally disconnected (open) and are closed when the switch ...

7. Railroad switch - Wikipedia

   en.wikipedia.org/wiki/Railroad_switch

   A three-way switch is used to split a railroad track into three divergent paths rather than the more usual two. There are two types of three-way switches. In a symmetrical three-way switch, the left and right branches diverge at the same place. In an asymmetrical three-way switch, the branches diverge in a staggered way using two interlaced ...