Define the term "mishap" as used in naval safety regulations.

The term "mishap" in naval safety regulations is defined as an unplanned event that results in injury, illness, or property damage. This definition emphasizes the unexpected nature of a mishap, highlighting how such occurrences can lead to significant negative outcomes for personnel, health, and equipment.

Understanding this definition is critical for safety supervisors, as it aligns with the core principles of risk management and safety accountability. By recognizing what constitutes a mishap, safety supervisors can develop appropriate preventative measures, implement proper reporting protocols, and engage in comprehensive investigations to prevent future occurrences.

The other options provided do not accurately capture the essence of a mishap as defined in safety regulations. For instance, a minor incident that does not require reporting fails to acknowledge the potential seriousness of unplanned events, while a planned safety drill is a proactive measure and not an unplanned event at all. An equipment failure during operations might be part of a mishap but does not encompass the broader implications involving injury or damage. Thus, the definition of a mishap is foundational for promoting a culture of safety and accountability within naval operations.