What is the operational characteristic of a Solid State Oxygen Storage System?

The operational characteristic of a Solid State Oxygen Storage System being low maintenance stems from the nature of the materials and technologies utilized within these systems. Solid state systems typically involve the use of stable, contained materials that do not require frequent servicing or replacement, unlike traditional gas storage systems, which may involve frequent inspections or replacements due to wear and tear or gas loss.

Low maintenance is a significant advantage in aerospace applications where reliability and efficiency are crucial. This aspect allows crews to focus on operations rather than ongoing upkeep. Systems designed for solid-state oxygen storage also minimize complex mechanisms that can fail or require tuning, thus further reducing the need for maintenance.

The other choices suggest various disadvantages or operational needs that characteristically do not align with solid state technology's inherent benefits. For instance, constant monitoring is less critical due to the stability of solid state systems. High risk of leakage is not applicable, as these systems are designed to be leak-resistant through solid containment methods. Very low weight, while a potential characteristic of some systems, isn't universally true as solid state systems can vary in weight based on their specific design and materials used.