What is crucial for the proper function of aircrew helmets?

The proper function of aircrew helmets is fundamentally reliant on them being fitted properly and worn correctly. A well-fitted helmet ensures that it can effectively protect the head from impact and potential injuries. If the helmet is too loose or too tight, it may not provide adequate protection in the event of a crash or sudden deceleration. Additional factors such as comfort, visibility, and communication effectiveness can be compromised when the helmet is not positioned correctly.

Moreover, a correctly worn helmet can help maintain the integrity of the helmet's design features aimed at protecting against environmental factors, noise, and other hazards associated with flying. Proper fit and wear are essential elements in ensuring that the helmet serves its intended purposes, which can ultimately influence the safety and performance of aircrew members.

This explanation underscores the importance of attention to detail in safety equipment and how proper utilization maximizes protective features.