🔍 Key Concepts

• Autopilot basic function: what does the unit need in order to hold a selected heading? • Difference between course/heading command and feedback of actual rudder position. • Which sensors are typically built into other systems (GPS, radar, gyro) versus what the autopilot itself must directly use.

💭 Think About

• Think about how the autopilot knows what direction you WANT the vessel to go, and how it knows what the vessel is ACTUALLY doing. • Ask yourself which of the listed items are absolutely essential for a closed‑loop steering system, and which are optional add‑ons or from other navigation systems. • Consider a basic small‑craft autopilot with no GPS or radar connected – what two pieces of information does it still need to steer?

✅ Before You Answer

• Identify which choice includes a command signal for desired course/heading. • Identify which choice includes feedback about what the steering gear/rudder is actually doing. • Eliminate options that rely on external navigation or collision‑avoidance sensors that are not strictly required for an autopilot to function.