Uncontrolled IFR

Operations take place daily in uncontrolled airspace. Paynesville, MN (KPEX) is a typical non-towered airport with the familiar vignette depicting Class E beginning at 700 feet AGL. Departing Paynesville, any time we spend in the clouds below the Class E floor is IFR in uncontrolled airspace. Of course, as you should recall, lacking that magenta vignette, the 700-foot limit becomes 1200 feet. Instrument approaches begin with an ATC clearance in controlled airspace, but often take us into uncontrolled Class G airspace. At Paynesville, the RNAV (GPS) RWY 11 approach LPV mins take us to 200 feet AGL, 500 feet into the surface Class G airspace.

Key Takeaways:

• While IFR flight in uncontrolled (Class G) airspace without an ATC clearance is not explicitly prohibited by all regulations, it is practically impossible in most of the U.S. due to minimum altitude requirements that force aircraft into controlled airspace and the scarcity of suitable Class G.
• NTSB rulings have consistently found "pure" uncontrolled IFR operations, particularly departures into instrument conditions without a clearance, to be "careless and reckless" due to the lack of separation assurance, even when pilots take precautions.
• Pilots commonly operate IFR in Class G airspace, but typically as an incidental component of a larger IFR flight (e.g., during an instrument approach or departure below the controlled airspace floor), where a flight plan and clearance for controlled airspace are still in effect.

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