🔍 Key Concepts

• Understand the basic layout of an electro‑hydraulic steering system (power unit, control system, and backup features). • Know the normal role of a hydraulic pump versus devices that only store or transmit pressure/signals. • Distinguish between units that actually drive the rudder and units that only send steering commands.

💭 Think About

• Ask yourself: when one power pump fails, what device would you bring online that can actively supply hydraulic power in its place? • Which option is mainly for storing pressure rather than providing continuous power? • Which option(s) are only control or signaling devices and cannot move the rudder by themselves?

✅ Before You Answer

• Identify which choice is another source of hydraulic power, not just stored energy or control signal. • Eliminate any option that only transmits steering commands from the bridge to the steering gear. • Verify which component is specifically provided as a backup power unit in typical electro‑hydraulic steering arrangements.