When should thorough decontamination be started?

Thorough decontamination should be initiated when the mission allows because it prioritizes both the safety of the personnel and the integrity of the mission. This timing ensures that decontamination can be conducted effectively without compromising operational effectiveness. Implementing decontamination measures at this point allows for a balance between maintaining the mission's objectives and protecting the health of the Marines involved.

Starting decontamination immediately might not be practical in a high-stakes situation where immediate threats need to be addressed first. Waiting until the end of the day could lead to prolonged exposure to contaminants, increasing health risks for personnel. Therefore, initiating decontamination when conditions permit is the most effective approach for both safety and operational efficiency.