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  • Thumbnail for Signal lamp
    code. Aircraft can acknowledge signals by rocking their wings or flashing their landing lights. Colt Acetylene Flash Lantern Flag semaphore Heliograph...
    8 KB (950 words) - 07:54, 24 March 2024
  • Thumbnail for Variations in traffic light operation
    prohibits the flashing yellow arrow in favor of a flashing red arrow. Tucson, Arizona uses a doghouse signal, with bimodal arrow (green and flashing yellow arrow)...
    60 KB (8,279 words) - 17:47, 2 September 2024
  • Thumbnail for Traffic light
    Traffic light (redirect from Traffic signal)
    setup of traffic signal operations. Not all states have ratified the convention. A three-colour signal head should have three non-flashing lights which are...
    100 KB (10,818 words) - 21:20, 11 October 2024
  • Thumbnail for UK railway signalling
    route. A flashing double yellow (only used in 4-aspect signalling) means that the next signal is showing flashing single yellow. A flashing single yellow...
    67 KB (9,025 words) - 18:58, 21 September 2024
  • Thumbnail for North American railroad signals
    a signal aspect incorporates a flashing lamp, the flashing lamp is always applied to less restrictive signals. This is to prevent a stuck flashing relay...
    53 KB (7,583 words) - 23:34, 29 June 2024
  • Thumbnail for Level crossing
    1310-metre runway 14L/32R are signalled with two red flashing lights on either side of the runway and a horizontal bar of flashing red lights to indicate the...
    33 KB (3,037 words) - 04:53, 29 September 2024
  • Thumbnail for Directional Infrared Counter Measures
    pulsing flashes of IR energy confuse the missile guidance system, preventing the tracking of the target aircraft. The AN/AAQ-24 system is a directional infrared...
    7 KB (734 words) - 22:11, 1 October 2024
  • Thumbnail for Automotive lighting
    warning and stop signals. One potential problem with flashing stop lights in the United States and Canada is regulations that permit flashing stop lights to...
    117 KB (13,267 words) - 19:08, 13 October 2024
  • Thumbnail for Pedestrian crossing
    crossing"), flashing yellow beacons (also known as rectangular rapid-flashing beacons or RRFBs), stop or yield signs, or by actuated or automatic signals. Some...
    83 KB (8,685 words) - 15:18, 11 October 2024
  • corresponding incoming bit. This sequence is maintained even when only one-directional data transfer is intended. Transmission using a single sub (Figure 1)...
    51 KB (6,026 words) - 19:00, 2 October 2024
  • Thumbnail for Zenith Flash-matic
    signals to the receiving monitor. The Flash-matic instead placed the complexity in the receiver as opposed to the transmitter. It used a directional beam...
    5 KB (602 words) - 11:14, 26 July 2023
  • Thumbnail for Non-directional beacon
    A non-directional beacon (NDB) or non-directional radio beacon is a radio beacon which does not include inherent directional information. Radio beacons...
    25 KB (3,238 words) - 20:30, 7 June 2024
  • broadcast signal intrusion is the hijacking of broadcast signals of radio, television stations, cable television broadcast feeds or satellite signals without...
    69 KB (7,296 words) - 09:15, 9 October 2024
  • longer provided. Instead, the signal in rear of the junction signal is provided with a directional indicator. The junction signal is provided with a route...
    79 KB (7,560 words) - 01:01, 10 October 2024
  • A radio-based system still uses a directional signal transmitted from an emitter, but being radio-based, its signal is not blocked by visual obstructions...
    16 KB (2,232 words) - 01:37, 5 August 2024
  • Thumbnail for Union Switch & Signal
    Level crossing signals: Model 95 gate mechanism 8" and 12" flashing lights Bells1, mastils, gate arms and counterweights Cab signaling equipment Automatic...
    14 KB (1,199 words) - 19:28, 1 May 2024
  • newly or which is changing its signal characteristics. This short time period is used by the auditory system for directional and loudness analysis of this...
    47 KB (6,467 words) - 16:20, 3 September 2024
  • Thumbnail for Road signs in Australia
    Green - start cross with care Flashing red - don't start to cross Countdown (without flashing red) Countdown (with flashing red) The traffic lights for...
    72 KB (6,923 words) - 22:40, 13 October 2024
  • Thumbnail for Marker beacon
    tone signal on a low-powered (3 watts), 75 MHz carrier signal. Its antenna is highly directional, and is pointed straight up. The valid signal area is...
    10 KB (1,258 words) - 11:31, 20 August 2024
  • Thumbnail for Emergency vehicle lighting
    Emergency vehicle lighting (category Signalling lights)
    employing blue flashing lights must install and operate them in tandem with flashing amber lights, blue lights alone may not be used. The flashing blue lights...
    149 KB (18,636 words) - 00:09, 14 October 2024
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