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  2. United States National Radio Quiet Zone - Wikipedia

    en.wikipedia.org/wiki/United_States_National...

    The NRQZ includes portions of West Virginia and Virginia and a small part of Maryland. The National Radio Quiet Zone (NRQZ) is a large area of land in the United States designated as a radio quiet zone, in which radio transmissions are restricted by law to facilitate scientific research and the gathering of military intelligence.

  3. Aeronautical Information Publication - Wikipedia

    en.wikipedia.org/wiki/Aeronautical_Information...

    The structure and contents of AIPs are standardized by international agreement through ICAO. AIPs normally have three parts – GEN (general), ENR (en route) and AD (aerodromes). The document contains many charts; most of these are in the AD section where details and charts of all public aerodromes are published.

  4. Noise regulation - Wikipedia

    en.wikipedia.org/wiki/Noise_regulation

    They also added a section that limited expand of operations without consideration of noise. Fairfax County, VA (Sections 105-4-4 and 108-5-1) require agricultural operation to meet maximum land use regulations and prohibit unnecessary noise.

  5. Counter-IED equipment - Wikipedia

    en.wikipedia.org/wiki/Counter-IED_equipment

    Restricted link [8] Ultra Wide Band High Powered Electro Magnetics: An UWB-HPEM system typically consists of the following components: a battery-based direct current power supply, an actuation system, a semiconductor-based ultra-wideband pulse generator and an ultra-wideband antenna. Depending on the type of threat, it can either set off a ...

  6. Laser safety - Wikipedia

    en.wikipedia.org/wiki/Laser_safety

    Typically, the sale of laser pointers is restricted to either class 3A (<5 mW) or class 2 (<1 mW), depending on local regulations. For example, in the US, Canada and the UK, class 3A is the maximum permitted, unless a key actuated control or other safety features are provided. [ 31 ]

  7. No-fly zone - Wikipedia

    en.wikipedia.org/wiki/No-fly_zone

    Following the 1991 Gulf War, the United States along with other Coalition nations established two no-fly zones in Iraq. [4] US and Coalition officials stated that the northern no-fly zone was intended to prevent attacks against the Kurdish people by the Iraqi regime of Saddam Hussein, and that the southern no-fly-zone was intended to protect Iraq's Shia population.

  8. Security clearance - Wikipedia

    en.wikipedia.org/wiki/Security_clearance

    A security clearance is a status granted to individuals allowing them access to classified information (state or organizational secrets) or to restricted areas, after completion of a thorough background check.

  9. Chernobyl exclusion zone - Wikipedia

    en.wikipedia.org/wiki/Chernobyl_exclusion_zone

    The current area of approximately 2,600 km 2 (1,000 sq mi) [8] in Ukraine is where radioactive contamination is the highest, and public access and habitation are accordingly restricted. Other areas of compulsory resettlement and voluntary relocation not part of the restricted exclusion zone exist in the surrounding areas and throughout Ukraine. [9]