What must a pilot do when flying in Class G airspace and weather conditions are below VFR?

When a pilot is flying in Class G airspace and encounters weather conditions that are below Visual Flight Rules (VFR), the appropriate action is to file an Instrument Flight Rules (IFR) flight plan and obtain clearance from Air Traffic Control (ATC). In Class G airspace, which is uncontrolled airspace, pilots are expected to adhere to VFR when conditions are suitable. However, when weather deteriorates to below VFR minimums, it becomes unsafe and legally insufficient to continue flying visually.

Filing an IFR flight plan allows the pilot to transition to instrument flying, which is designed for navigating in low visibility conditions. This step ensures that the pilot receives necessary routing and traffic advisories from ATC, which is crucial for maintaining safety in controlled flight operations. Moreover, obtaining an ATC clearance is fundamental, as it signifies permission to operate under IFR and allows for coordinated traffic management within the airspace system.

The other choices do not provide a safe or legal alternative under these circumstances. Continuing VFR without a plan during below-minimum weather can result in poor situational awareness and potential accidents. Switching to VFR when the weather clears may not address the immediate need for safe navigation during poor conditions, and changing the route to avoid controlled airspace