What is meant by the term "VFR into IMC"?

The term "VFR into IMC" refers specifically to the transition from Visual Flight Rules (VFR) conditions, where a pilot has adequate visibility and reference to the ground, into Instrument Meteorological Conditions (IMC), where visibility is significantly reduced due to weather factors such as clouds, fog, or precipitation. This transition poses a risk because pilots operating under VFR may not be trained or equipped to handle flying solely by instruments, which is necessary in IMC.

This situation can lead to spatial disorientation and loss of control if the pilot is not instrument rated or if the aircraft is not equipped for IFR (Instrument Flight Rules) operations. This term is critical in aviation safety discussions as it highlights the dangers of weather conditions that may rapidly deteriorate during a flight.

The other options do not accurately describe the phenomenon. Transitioning from a controlled airport to uncontrolled airspace does not necessarily involve IMC conditions. Likewise, flying without a flight plan or losing communication with air traffic control does not pertain specifically to the VFR into IMC scenario.