🔍 Key Concepts

• Identify which modes are follow-up (require rudder position feedback to stop at a commanded angle) versus non-follow-up (NFU) (rudder moves only while the control is held). • Trace the repeatback (rudder angle feedback) signal in figure "A" and see which blocks it actually connects to in each mode. • Notice how the NFU controller is drawn differently from the hand and gyro paths, and compare that with the feedback loop shown in figure "B".

💭 Think About

• In which modes does the system need to compare the commanded rudder angle to the actual rudder angle in order to stop the rudder automatically? • Looking at the diagram, when the Operating Mode Selector Switch is in each position (Hand, Gyro, NFU), does the repeatback path still close a loop through the port/starboard amplifier, or is it bypassed? • Based on figure "B", which mode clearly bypasses the rudder error amplifier (where feedback is used) and instead drives the relays directly?

✅ Before You Answer

• Verify which modes are clearly labeled or implied as follow-up control and which are non-follow-up (NFU). • Confirm that the repeatback signal (rudder position feedback) goes into the port and starboard amplifiers only when a position must be held automatically, not just when rudder motion is commanded. • Double-check that in NFU mode the control element (NFU tiller/controller) drives the rudder without comparing to a commanded position, meaning feedback is not used to stop at a set angle.