What should be done if a shell does not fire from a mortar?

When a shell does not fire from a mortar, the most appropriate response is to warn others in the area and mark the mortar. This action is vital because it prioritizes safety and minimizes the risk of injury to bystanders and personnel involved in the display. By marking the mortar, you clearly indicate that there is a potential safety hazard, allowing others to maintain a safe distance until the situation is resolved.

In this scenario, leaving the shell to burn out can pose a lethal risk, as there is no guarantee that it will simply extinguish safely. Handling the shell immediately might also be fraught with danger, especially without proper protocols in place. Reloading and attempting to fire it again runs the risk of causing an unexpected ignition or malfunction, which could lead to disastrous outcomes. Therefore, the correct approach is to ensure that safety measures are applied, clearly communicate the issue, and allow for appropriate procedures to address the unexecuted shot.