What type of maintenance must be conducted on the Sentinel to ensure operational readiness?

Preventive maintenance is essential for the Sentinel to ensure operational readiness. This type of maintenance involves regular inspections, servicing, and adjustments that are performed to prevent potential failures before they occur. By conducting preventive maintenance, operators can identify and address minor issues before they escalate into more significant problems that could impact the system's performance and reliability. This proactive approach extends the lifespan of the equipment and keeps it in optimal working condition, thereby ensuring readiness when needed for air defense operations.

In contrast, corrective and emergency maintenance are reactive measures that address issues after they arise, making them less effective in maintaining consistent operational capacity. Regular and emergency maintenance are important, but focusing on preventive maintenance is key to proactively managing equipment health and readiness in a combat or defense scenario.