What does EFC stand for in air traffic control operations?

The term "Expect Further Clearance" refers to a specific instruction given to pilots by air traffic control. When ATC uses this phrase, it indicates that the pilot should anticipate further instructions regarding their flight plan, typically related to their route, altitude, or other operational details that may be pending at that time. This communication is essential for maintaining safety and efficiency in the airspace system, especially in busy environments where multiple aircraft may be operating in close proximity.

Understanding this term is crucial for pilots as it helps them manage their flight expectations and prepare for subsequent instructions from ATC. The use of "Expect Further Clearance" assures pilots that while they may hold or maneuver in a certain way, they will receive necessary updates as the situation in the airspace evolves. This contributes to the overall safety and coordination of air traffic operations.