What word should follow safety alerts issued by ATC?

The term that follows safety alerts issued by Air Traffic Control (ATC) is "Immediately." This term conveys the urgency and critical nature of safety alerts. When ATC issues a safety alert, they are providing information regarding potential hazards or situations that could jeopardize the safety of flight operations. Using "immediately" emphasizes the need for pilots and operators to take swift action in response to the alert, as delays in their reaction could lead to dangerous situations.

In the context of aviation communication, clarity and decisiveness are crucial. While the other options also indicate the need for timely responses, "immediately" is typically the preferred word as it specifies the necessity for instant attention and action without any ambiguity. It conveys a stronger imperative than the alternative choices, ensuring that the recipients understand the seriousness of the alert and the requirement to act without hesitation.