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  2. Common traffic advisory frequency - Wikipedia

    en.wikipedia.org/wiki/Common_traffic_advisory...

    Common traffic advisory frequency (CTAF) is the name given to the VHF radio frequency used for air-to-air communication at United States, and Australian non-towered airports. Many towered airports close their towers overnight, keeping the airport open for cargo operations and other activity.

  3. Airband - Wikipedia

    en.wikipedia.org/wiki/Airband

    The two are exchanged using the button marked with a double-headed arrow. The tuning control on the right only affects the standby frequency. Airband or aircraft band is the name for a group of frequencies in the VHF radio spectrum allocated to radio communication in civil aviation, sometimes also referred to as VHF, or phonetically as "Victor".

  4. UNICOM - Wikipedia

    en.wikipedia.org/wiki/UNICOM

    During these times, pilots self-announce their position and/or intentions over the CTAF frequency, which is often the same as the UNICOM frequency. [6] When a part-time UNICOM station is located on the same airport as a part-time control tower, the same frequency will be used by both ground stations to avoid confusion.

  5. Millimeter wave scanner - Wikipedia

    en.wikipedia.org/wiki/Millimeter_wave_scanner

    A millimeter wave scanner at Cologne Bonn Airport, Germany, Europe. A millimeter wave scanner is a whole-body imaging device used for detecting objects concealed underneath a person’s clothing using a form of electromagnetic radiation.

  6. Aircraft emergency frequency - Wikipedia

    en.wikipedia.org/wiki/Aircraft_emergency_frequency

    The aircraft emergency frequency (also known in the USA as Guard) is a frequency used on the aircraft band reserved for emergency communications for aircraft in distress.The frequencies are 121.5 MHz for civilian, also known as International Air Distress (IAD), International Aeronautical Emergency Frequency, [1] or VHF Guard, [1] and 243.0 MHz—the second harmonic of VHF guard—for military ...

  7. Airport surveillance radar - Wikipedia

    en.wikipedia.org/wiki/Airport_surveillance_radar

    Daytona Beach International Airport Surveillance Radar. An airport surveillance radar (ASR) is a radar system used at airports to detect and display the presence and position of aircraft in the terminal area, the airspace around airports. It is the main air traffic control system for the airspace around airports. At large airports it typically ...

  8. Ground communication outlet - Wikipedia

    en.wikipedia.org/wiki/Ground_communication_outlet

    The system uses the airport's listed frequency ( 121.725 or 135.075 ). The system is activated with four "key clicks" on the VHF radio to contact the appropriate ATC facility or six "key strokes" to contact the FSS. There is a timer on the modem connection. If no voice is heard for a preset interval, the system disconnects.

  9. Full body scanner - Wikipedia

    en.wikipedia.org/wiki/Full_body_scanner

    Full body scanner in millimeter wave scanners technique at Cologne Bonn Airport Image from an active millimeter wave body scanner. A full-body scanner is a device that detects objects on or inside a person's body for security screening purposes, without physically removing clothes or making physical contact.