What immediate action should be taken when coming across UXO?

When encountering unexploded ordnance (UXO), the immediate action that should be taken is to avoid contact and report it. This is the safest and most appropriate response because UXO can be unstable and potentially dangerous. Moving closer to investigate the type of UXO or trying to clear the area could lead to accidental detonation or injury. Reporting it to the appropriate authorities ensures that trained professionals who understand the risks and have the necessary equipment can handle the situation safely. Taking safety precautions by avoiding contact and informing the right personnel prevents additional risks not only to oneself but also to others who may be in the vicinity.