NAVIGUIDE 4000 056336 Rev. AA1.3: Example System Configurations Page 1–131.3.6 FU / NFU Manual Steering for Dual RuddersFig.1–6 shows a FU / NFU manual steering system for dual rudder control. This isbasically the F/NN system described in 1.3.1, but with all rudder control facilitiespresent in twofold.The hand wheel at the Main Bridge provides synchronous FU control of the portand stb. rudders.Each remote steering position is equipped with two FU Mini-Wheel/Display Unitsand a Dual Rudder Sync Selector. Once control is transferred to a remote steeringposition, the operator may switch from the „Synchronous“ to the „Independent“mode to control the port and stb. rudders independently.During normal operation, one of the SCUs will become the bus master and controlall bus communications. The other SCU will become a slave unit. However, incase of failure of one SCU, the associated rudder can no longer be controlled inthe bus steering modes.Fig. 1–6:example FU/NFU steeringfor dualruddersPort WingMain BridgeStb. WingPortSCUSAMStb.SCUPortSteeringGearPumpsStb.SteeringGearPumpsNAVINET 4000 Steering Control NetworkDRSS DRSS
