What does the designation 18M-3(S-6R) represent?

The designation 18M-3(S-6R) indicates a specific category of maintenance within the Navy's maintenance management system, which helps ensure that equipment and systems are kept in optimal working condition. The "18M" generally indicates a type of maintenance that is performed on an as-needed basis, rather than preventative or scheduled maintenance.

The "3" suggests a maintenance level or designation, which helps delineate the type of work required. The "S-6R" component may refer to a specific maintenance task, type, or related system, but it is the "M" in "18M" that points to 'convenience related maintenance.' This term is often used to describe tasks that can be performed as needed or when it is convenient for the operational schedule, without the constraints of emergency or mandatory requirements.

In this context, convenience related maintenance allows for operational flexibility and ensures that maintenance can be aligned with the needs of the mission or overall schedule, which is crucial for effective resource management. This aligns with the overall principles of the 3-M system, focusing on efficient and effective maintenance practices.