What are the two levels of maintenance in military operations?

The correct answer pertains to the two levels of maintenance in military operations, which are crucial for ensuring that equipment and systems are operational and ready for deployment. The concept of "Field and Sustainment" maintenance captures the essence of these approaches.

Field maintenance refers to the maintenance performed at the operational level, closer to where the equipment is used. This includes basic repairs and servicing done in the field to ensure that equipment remains functional during operations. It is often less complex and designed for immediate response to keep operational capabilities available.

Sustainment maintenance, on the other hand, is performed at a more centralized location, often involving more in-depth repairs and overhauls. This level of maintenance supports the lifecycle of the equipment and is aimed at prolonging its functionality through comprehensive repair, updates, and preventive measures.

Understanding these two levels is essential for military personnel, as it helps in organizing maintenance activities effectively to maximize operational readiness.