When should you give a warning during an NBC attack?

In the context of an NBC (Nuclear, Biological, Chemical) attack, the appropriate moment to give a warning is after you have masked. Once you recognize that an NBC attack is imminent or has occurred, the immediate priority is to ensure your own safety by donning your protective mask. This step is crucial to minimize exposure to hazardous materials.

Once you have secured your own protection, you can then focus on alerting others around you. Providing a warning after masking not only demonstrates responsibility for your own safety but also allows you to effectively communicate the necessary actions to others without jeopardizing your own health.

The other options involve scenarios that could lead to confusion or inadequate protection during a critical moment. For instance, giving a warning before masking could expose you to harmful agents and hinder your ability to inform others afterward. Similarly, warning during the attack might not leave enough time for others to respond effectively, as they may need that time to mask themselves as well. Lastly, failing to provide a warning disregards the shared safety responsibilities in a team or unit situation. Thus, the most effective strategy is to mask first and then communicate the threat.