In Class G airspace, which of the following is true regarding ATC permission?

In Class G airspace, operations are indeed allowed without ATC permission. This class of airspace is classified as uncontrolled airspace, meaning that pilots do not need to obtain authorization from air traffic control to operate within it. Pilots retain the responsibility for their own separation from other aircraft and are expected to follow visual flight rules (VFR) guidelines.

Unlike controlled airspaces, where ATC provides instructions and grants permission to operate, Class G airspace gives pilots more freedom, allowing them to operate without the need for direct communication or clearance from ATC. This is particularly useful in less congested areas, where the likelihood of encountering other aircraft is diminished, enhancing operational flexibility for pilots.

The other options suggest a degree of control or requirements for ATC interaction that do not apply in Class G airspace. Therefore, the accurate understanding of Class G operations underscores the autonomy granted to pilots operating in these regions.