What class of airspace is IFR only?

Class A. IFR flights only are permitted, all flights are provided with air traffic control service and are separated from each other. Class B. IFR and VFR flights are permitted, all flights are provided with air traffic control service and are separated from each other.



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Class Golf ( Class G ) airspace is the uncontrolled govern free airspace which is void from Air Traffic Control ( ATC ) jurisdiction. Class G airspace supports both Instrument Flight Rules ( IFR ) and Visual Flight Rules ( VFR ) operations within.

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Flights. Aircraft within Class B airspace are required to operate in accordance with current IFR procedures.

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Most airspace in the United States is class E. The airspace above FL600 is also class E. No ATC clearance or radio communication is required for VFR flight in class E airspace.

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There are two categories of airspace or airspace areas: Regulatory (Class A, B, C, D, and E airspace areas, restricted and prohibited areas). Nonregulatory (military operations areas [MOA], warning areas, alert areas, controlled firing areas [CFA], and national security areas [NSA]).

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In short, the real purpose of Class F is to allow flights to remain IFR in uncontrolled environments. Since this is a sort of mix between Class E and Class G airspace, there is no Class F inside the United States.

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Class C airspace never requires a separate clearance. If you are in two-way communications with the controlling facility, you satisfy the requirements for authorization through Class C airspace.

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In theory, a pilot can operate in sub-VMC conditions under IFR without an ATC clearance in Class G airspace. However, to enter or operate in controlled airspace under IFR, an ATC clearance is required.

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Class G airspace is Uncontrolled Airspace. In class G airspace, operations may be conducted under IFR or VFR. ATC has no authority, but VFR minima are to be known by pilots. Traffic Information may be given by ATC as far as is practical in respect of other flights.

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It's important to remember that VFR and IFR are sets of rules that apply both to pilots and airplanes. Some airplanes will be equipped to fly using both, but others are only VFR equipped. It's important to double-check your plane and make sure you are properly equipped.

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Class G airspace is the only uncontrolled airspace out there in the United States. Thus, both IFR and VFR traffic is also uncontrolled here. To find out Class G airspace, note that it exists where the other five airspace classes, i.e., Class A, B, C, D, or E, don't.

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IFR flying is astronomically more challenging than VFR flying, but those pilots who achieve this distinction are invariably more equipped to fly IFR and VFR. Aviating under IFR, a pilot is authorized to fly into clouds in what is called zero visibility. All of the VFR-pilot privileges also apply.

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Many pilots prefer IFR over VFR because they can fly regardless of the weather conditions. They aren't constrained by the VFR minimums you saw above. Also, IFR flying, with enough practice, makes navigation much simpler. It is as easy as following a line from A to B.

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Prudent pilots typically set higher weather minimums for night VFR flights. FAR 91.157—In order to get a Special VFR clearance at night, you must have an instrument rating, an instrument-equipped airplane, 1 mile visibility, be able to remain clear of clouds, and a Special VFR clearance from air traffic control.

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