What is defined as "minimum retained (hydraulic) system performance"?

The concept of "minimum retained (hydraulic) system performance" primarily relates to the operational capability of hydraulic systems, particularly in steering applications. This performance metric ensures that the system can adequately control the steering mechanisms under various conditions, providing necessary responsiveness and safety.

In the context of hydraulic systems, retaining a certain percentage of steering arm full travel is critical. The correct answer highlights the requirement of a maximum pressure threshold that should not exceed 20 ft lbs. This stipulation ensures that the system can operate effectively without risking mechanical failure or inefficiency due to excessive pressure, which could compromise the integrity of the hydraulic components.

Maintaining hydraulic pressure within these parameters is essential for safe navigation and control, especially in marine environments where steering performance is crucial. Thus, the focus on limiting pressure to 20 ft lbs ensures that the system remains within safe operating ranges, promoting reliability and longevity of hydraulic components.

The emphasis on hydraulic performance metrics underscores the importance of adhering to defined standards to achieve optimal functionality in marine applications.