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  2. National Airspace System - Wikipedia

    en.wikipedia.org/wiki/National_Airspace_System

    At 1,200 ft. the airspace extends to 10 nautical miles in diameter which continues to 4,000 ft. Pilots are required to establish two-way radio communications with the ATC facility providing air traffic control service to the area before entering the airspace. Within Class C, Visual and Instrument pilots are separated. [6]

  3. Airspace class (United States) - Wikipedia

    en.wikipedia.org/wiki/Airspace_class_(United_States)

    The core surface area has a radius of five nautical miles (9 km), and goes from the surface to the ceiling of the class C airspace. The upper "shelf" area has a radius of ten nautical miles, and extends from as low as 1,200 feet (370 m) up to the ceiling of the airspace.

  4. Airspace class - Wikipedia

    en.wikipedia.org/wiki/Airspace_class

    Class E is used for airspace between usually 2,500 ft (760 m) AGL (around airports 1,000 ft (300 m) or 1,700 ft (520 m) AGL) and FL100 (10,000 ft; 3,050 m) . Class F is not used. Class G is used below 2,500 ft (760 m) AGL (around airports below 1,000 ft (300 m) AGL, then rises via a step at 1,700 ft (520 m) to 2,500 ft (760 m) AGL). IFR flights ...

  5. List of highest communities in the United States - Wikipedia

    en.wikipedia.org/wiki/List_of_highest...

    To be included on the list, a place needs to be an incorporated municipality (i.e. a city, town, or village) and it needs to be at an elevation of 3,000 feet (914 m) or higher. In the United States, settlements above 3,000 feet are found primarily on the High Plains , in the Rocky Mountains , and in Western North Carolina .

  6. Visual meteorological conditions - Wikipedia

    en.wikipedia.org/wiki/Visual_meteorological...

    Typical visibility requirements vary from one statute mile to five statute miles (many countries define these in metric units as 1,500 m to 8 km). Typical cloud clearance requirements vary from merely remaining clear of clouds to remaining at least one mile away (1,500 m in some countries) from clouds horizontally and 1,000 feet away from ...

  7. Mile - Wikipedia

    en.wikipedia.org/wiki/Mile

    Various historic miles and leagues from an 1848 German textbook, given in feet, metres, and fractions of a "degree of meridian" The German mile (Meile) was 24,000 German feet. The standardised Austrian mile used in southern Germany and the Austrian Empire was 7.586 km; the Prussian mile used in northern Germany was 7.5325 km.

  8. Provo Municipal Airport - Wikipedia

    en.wikipedia.org/wiki/Provo_Municipal_Airport

    The airport's Air Traffic Control Tower opened in 2005; previously, the airport was uncontrolled.When the control tower opened, the nearby airspace became Class D airspace over a radius of 4 nautical miles (7.4 km) around the airport and up to 7,000 feet (2,100 m) MSL (2500 feet AGL), with a circular cutout in the southern portion surrounding nearby Spanish Fork Municipal Airport Woodhouse ...

  9. Mess Creek Escarpment - Wikipedia

    en.wikipedia.org/wiki/Mess_Creek_Escarpment

    [2] [3] The northern segment extends southeast along the southwestern side of the Big Raven Plateau for about 8 kilometres (5.0 miles) and reaches an elevation of 1,700 metres (5,500 feet). At least four unnamed streams flow down this segment of the escarpment into Mess Creek which is less than 760 metres (2,500 feet) in elevation. [2]