UNCONTROLLED IFR

摘要

The United States has lost once large areas of uncontrolled airspace above 1200 feet AGL. IFR en-route flight in uncontrolled airspace has become an anachronism, but many everyday operations have a Class G component. To give some ammunition for those hangar discussions as well as help us better understand the system in which we fly, let's review some of the applicable rules and practical considerations.