Which piece of information is NOT needed for a turnaround marking?

A turnaround marking is a critical part of mine rescue operations. It serves to document important information about a situation and assist in determining the progress of rescue efforts. The information typically collected for a turnaround marking includes the captain's initials, the date, and the time. Each of these elements is vital because they establish accountability, the specific circumstances of the rescue, and the timeline of actions taken, which can be crucial in coordination and communication during the rescue operation.

In contrast, having the emergency contact number is not necessary for a turnaround marking in this context. While emergency contact information may play a role in overall communication strategies, it does not directly impact the immediate documentation of actions and responsibilities at the scene. Therefore, it is not a required piece of information for the marking itself, differentiating it from the essential elements that are crucial for operational effectiveness and accountability during an emergency response.