What should be done first when encountering unexploded ordnance (UXO)?

When encountering unexploded ordnance (UXO), the first appropriate action is to avoid contact and mark the location. This is crucial for ensuring the safety of personnel and preventing further accidents. UXO can be extremely dangerous, potentially containing live explosives that can detonate unexpectedly. By avoiding contact, individuals can prevent accidents and injuries.

Marking the location also serves to alert others about the presence of the UXO, establishing a safety perimeter and preventing accidental encounters by additional personnel or civilians. This initial response lays the groundwork for further actions, such as reporting the UXO to the appropriate authorities who are trained to handle such situations safely and effectively.

The other options are less advisable. Attempting to neutralize the UXO without proper training and equipment poses a significant risk. Reporting the incident to local media is not appropriate and does not address the immediate danger. Ignoring the UXO completely could lead to harmful consequences for anyone in the vicinity. Therefore, avoiding contact and marking the location is the best first response to ensure safety and proper handling of the UXO.