Is it true that the chinstrap must be worn at all times regardless of helmet fit?

Wearing the chinstrap of a helmet at all times is essential for ensuring the helmet stays securely in place, particularly during active firefighting or emergency response situations. This practice is critical for the safety of firefighters, as it prevents the helmet from shifting or falling off, which could expose them to head injuries. A helmet that is not properly secured may not provide the necessary protection when encountering hazardous conditions, debris, or intense heat.

For instance, during firefighting operations, fast movements, sudden impacts, or changes in position can easily result in a helmet dislodging without a chinstrap. Therefore, making it a requirement to wear the chinstrap at all times reinforces the importance of maintaining personal protective equipment (PPE) integrity to minimize risks and ensure maximum protection.

In contrast, options suggesting that the chinstrap can be omitted during certain activities or based on helmet fit do not prioritize safety to the same extent, as even helmets that fit well can be compromised by movement.