Which term best describes the summary of the traffic situation shared by the specialist being relieved?

The term "Verbal Briefing" is the most appropriate description for the summary of the traffic situation shared by the specialist being relieved. A verbal briefing refers specifically to a spoken communication that provides essential information and updates about the current circumstances in a concise and organized manner. This type of briefing is typically used in air traffic control to ensure that the incoming specialist has a clear understanding of the current traffic conditions and any pertinent issues that need to be addressed.

Although other terms can imply a summary of traffic, they may not convey the immediacy and directness of communication that a verbal briefing encompasses. A "Situation Report" might be written and more formal, whereas "Traffic Update" could imply a more general update rather than a focused briefing. An "Operational Summary" may cover broader operational aspects that extend beyond immediate traffic and might not be specifically audio-focused. Overall, a verbal briefing is tailored to ensure a seamless transition in information and responsibility, making it the most fitting choice.