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  2. Air traffic control radar beacon system - Wikipedia

    en.wikipedia.org/wiki/Air_traffic_control_radar...

    Mode 3/A is used to identify each aircraft in the radar's coverage area. Mode C is used to request/report an aircraft's altitude. Two other modes, mode 4 and mode S, are not considered part of the ATCRBS system, but they use the same transmit and receive hardware. Mode 4 is used by military aircraft for the Identification Friend or Foe (IFF ...

  3. DEFCON - Wikipedia

    en.wikipedia.org/wiki/DEFCON

    DEFCON. The defense readiness condition ( DEFCON) is an alert state used by the United States Armed Forces. [ 1][ 2] For security reasons, the US military does not announce a DEFCON level to the public. [ 1] The DEFCON system was developed by the Joint Chiefs of Staff (JCS) and unified and specified combatant commands. [ 3]

  4. Radar beacon - Wikipedia

    en.wikipedia.org/wiki/Radar_beacon

    Radar beacon (short: racon) is – according to article 1.103 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) [1] – defined as "A transmitter-receiver associated with a fixed navigational mark which, when triggered by a radar, automatically returns a distinctive signal which can appear on the display of the ...

  5. Identification friend or foe - Wikipedia

    en.wikipedia.org/wiki/Identification_friend_or_foe

    Identification, friend or foe ( IFF) is a combat identification system designed for command and control. It uses a transponder that listens for an interrogation signal and then sends a response that identifies the broadcaster. IFF systems usually use radar frequencies, but other electromagnetic frequencies, radio or infrared, may be used. [1]

  6. Consciousness - Wikipedia

    en.wikipedia.org/wiki/Consciousness

    Using 'awareness', however, as a definition or synonym of consciousness is not a simple matter: If awareness of the environment . . . is the criterion of consciousness, then even the protozoans are conscious. If awareness of awareness is required, then it is doubtful whether the great apes and human infants are conscious. [26]

  7. AN/APG-85 - Wikipedia

    en.wikipedia.org/wiki/AN/APG-85

    The AN/APG-85 is an active electronically scanned array (AESA) radar system designed by Northrop Grumman for the Lockheed Martin F-35 Lightning II.The AN/APG-85 is a further development of the AN/APG-81 and is planned to be installed in all three variants of the F-35 aircraft from Lot 17 and onwards, which are planned to enter production in 2025.

  8. Altered state of consciousness - Wikipedia

    en.wikipedia.org/wiki/Altered_state_of_consciousness

    Those with personal experience of conditions such as Depersonalisation often cite the opposite, that it is an increased awareness of the environment and the self that results in altered states of consciousness. [35] When the reduction of self-awareness and environmental awareness take effect, they produce altered states of consciousness.

  9. 4chan - Wikipedia

    en.wikipedia.org/wiki/4chan

    4chan. 4chan is an anonymous English-language imageboard website. Launched by Christopher "moot" Poole in October 2003, the site hosts boards dedicated to a wide variety of topics, from video games and television to literature, cooking, weapons, music, history, anime, fitness, politics, and sports, among others.