Which of the following is NOT necessary to include during a check-in brief?

In a check-in brief, the primary focus is on critical information that influences operational planning and execution. While enemy location is an important factor to consider in many operational contexts, it is not always essential for a check-in brief. The purpose of this brief is typically to update team members on current resources, capabilities, and immediate situational awareness rather than detailed enemy assessments.

Munitions available is crucial because it informs the team about the firepower at their disposal, enabling effective planning and execution of objectives. The composition of forces is also essential, as it helps to clarify the strengths and capabilities of the team involved in the operation. Understanding night vision capabilities can be critical for planning operations that may occur in low-visibility conditions, allowing teams to optimize their strategies based on the equipment at their disposal.

Therefore, while knowing enemy location can contribute to overall situational awareness, it is less critical than the other elements mentioned during a check-in brief, making it the option that is not necessary to include.