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  2. United States National Radio Quiet Zone - Wikipedia

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

    The most severe restrictions to the general public are imposed within a 20-mile (32 km) radius of the Green Bank Observatory. [5] The Observatory polices the area actively for devices emitting excessive electromagnetic radiation such as microwave ovens, Wi-Fi access points, and faulty electrical equipment and asks people to stop using such ...

  3. File:Map (20).svg - Wikipedia

    en.wikipedia.org/wiki/File:Map_(20).svg

    This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. If the file has been modified from its original state, some details may not fully reflect the modified file.

  4. Washington, D.C., Special Flight Rules Area - Wikipedia

    en.wikipedia.org/wiki/Washington,_D.C.,_Special...

    The bright laser beams, which flash red-red-green, are easily seen, even during daylight. The laser beams can be seen 15 to 20 miles (24 to 32 km) away. Other pilots are unlikely to see the lasers because, when activated, the directional beams are pointed at the aircraft that has crossed into restricted airspace. Multiple lasers could be activated.

  5. Minimum off-route altitude - Wikipedia

    en.wikipedia.org/wiki/Minimum_off-route_altitude

    A minimum off-route altitude (MORA) provides a quick way for an aircraft pilot to read the minimum altitude required for terrain and obstacle clearance. MORAs give at least 1,000 feet altitude clearance above terrain and obstacles such as radio masts, and 2,000 feet where the terrain and obstacles exceed 5,000 feet. [1]

  6. Google Street View coverage - Wikipedia

    en.wikipedia.org/wiki/Google_Street_View_coverage

    The following is a timeline for Google Street View, a technology implemented in Google Maps and Google Earth that provides ground-level interactive panoramas of cities. The service was first introduced in the United States on May 25, 2007, and initially covered only five cities: San Francisco, Las Vegas, Denver, Miami, and New York City.

  7. Kalamazoo, Michigan - Wikipedia

    en.wikipedia.org/wiki/Kalamazoo,_Michigan

    It is known for playing obscure and underground music of all genres, and some local news and talk. Broadcasting 100 watts on 89.1 FM, WIDR can be heard from about a 20-mile radius from campus. WMUK is also on Western Michigan University's campus.