Which option expands the acronym EFC correctly?

• A. Equalized Flight Condition
• B. Emergency Flight Communications
• C. Expect-Further-Clearance
• D. Enhanced Field Communications

Answer: (C)

In aviation communications, EFC stands for “Expect-Further-Clearance.” This phrase tells you that ATC will provide the next clearance later, so you should not proceed beyond your current position or assumed clearance until you receive explicit instructions. It helps keep traffic organized when more instructions are coming or when you’re holding, taxiing, or waiting for a departure slot.

The correct expansion matches the standard ATC term. The other options aren’t recognized aviation terms used to indicate waiting for additional clearance, so they don’t fit the established usage. If ATC specifies a time with EFC, stay ready to comply by that time and follow the clearance once issued.