What must be done during an emergency regarding head counts?

During an emergency situation in aviation, it is crucial to conduct head counts of both passengers and crew members. This practice ensures that everyone on board is accounted for, which is vital for several reasons.

First, knowing the total number of individuals present allows emergency services to have accurate information when responding to the incident, thereby improving the effectiveness of their rescue efforts. It helps in assessing the extent of the situation, determining if there are any casualties, and ultimately ensuring that all individuals are safe or accounted for.

Additionally, conducting head counts reinforces the importance of safety protocols and communication among the crew. It aids in maintaining organization during high-stress situations where maintaining a clear understanding of who is present can significantly affect the outcome of the emergency response.

The other choices do not address the essential need for accountability in emergencies, which could lead to confusion and compromise safety efforts. Ignoring head counts or limiting them only to certain people could result in severe implications, including the potential for lives to be overlooked during rescue operations.