True or False: Helm displacement refers to the amount of hydraulic fluid output per helm revolution.

Helm displacement is indeed the term used to describe the amount of hydraulic fluid output per helm revolution. This concept is critical in the operation of hydraulic steering systems, where the movement of the helm (or steering wheel) is translated into hydraulic fluid movement to control the steering mechanism.

Understanding helm displacement is important because it impacts how responsive a steering system is. For example, a larger helm displacement may result in quicker responses to helm input, while smaller displacement could provide more gradual steering changes.

In hydraulic systems, measuring this output is essential for ensuring proper operation and safety; too much or too little displacement can lead to performance issues or mechanical failures. Therefore, the statement that defines helm displacement as the hydraulic fluid output per helm revolution is accurate and reflects a fundamental principle of hydraulic steering systems in marine applications.