Which term refers to the time it takes for a Marine to don a gas mask?

The term that accurately describes the time it takes for a Marine to don a gas mask is commonly referred to as "Gas Mask Drills." This terminology encompasses the practice and training that Marines undergo to ensure they can effectively and efficiently put on their gas masks in emergency situations. The emphasis on drills signifies the importance of speed and proficiency in this skill, which can be critical during a chemical, biological, radiological, or nuclear (CBRN) threat.

Training through these drills not only focuses on the correct method of donning the mask but also on the importance of doing so quickly and effectively to ensure personal safety and operational readiness in the field. Mastery of this skill is essential for maintaining situational awareness and effectiveness during CBRN scenarios, where time can be a significant factor in survival and mission success.