Which of the following is NOT a category of maintenance in the Navy?

The correct choice indicates that reactive maintenance is not recognized as an official category of maintenance in the Navy. In the context of Navy Maintenance & Material Management (3-M), maintenance categories typically focus on structured and proactive approaches to managing equipment and systems.

Preventive maintenance involves regular and scheduled maintenance activities aimed at preventing failures before they occur. This category is crucial for ensuring equipment reliability and longevity while minimizing unscheduled downtime.

Corrective maintenance refers to actions taken to repair or restore equipment to operational condition after a failure has occurred. This is reactive but is categorized under an established process to address and rectify issues promptly.

Operational maintenance generally encompasses routine maintenance tasks carried out during normal operations, ensuring equipment is functioning as intended without waiting for failures to occur.

In contrast, reactive maintenance implies a lack of planning, addressing problems only as they arise without prior scheduling or preventive measures. While it is a concept in maintenance management, it does not constitute a formal category within the Navy's established maintenance framework. Thus, reactive maintenance does not fit alongside the other recognized categories, which focus on proactive and structured methodologies.