What is the maximum time allowed to don and clear a mask without a hood?

The correct maximum time allowed to don and clear a mask without a hood is 9 seconds. This standard is critical for ensuring that Marines can quickly and effectively protect themselves in a chemical, biological, radiological, and nuclear (CBRN) environment. The ability to don a mask promptly can mean the difference between life and death, as exposure to harmful agents can occur rapidly in combat situations.

The specific time of 9 seconds is established through training and the operational readiness requirements of the USMC. This focus on speed and efficiency under pressure equips Marines with the skills necessary to react swiftly in high-stress scenarios where CBRN threats may be imminent. Mastering this skill during training ensures that Marines maintain effectiveness and safety in the field, reinforcing the importance of preparation and rapid response in combat operations.