2 ST4000+ Wheel & Tiller Autopilots: Owner’s Handbook1 Introduction1.2 Extended systemsThe ST4000+ is compatible with all other SeaTalk instruments.You can connect it to additional fixed or handheld SeaTalk autopilotcontrol units located at secondary steering and control positions(see page 52).You can also use the ST4000+ autopilot with any navigator(GPS, Decca, Loran) or wind instrument that transmits data in theinternationally-accepted National Marine Electronics Association(NMEA) 0183 format.The ST4000+ can display SeaTalk and NMEA instrument data in auser-defined selection of data pages. When you are using theST4000+ to repeat instrument data, it shows a ‘pop-up’ pilot page for5 seconds whenever you make a change in autopilot control.The ST4000+ can share all data transmitted from SeaTalkinstruments:• it can use wind information from a SeaTalk wind instrument forwind trim steering in Wind Vane mode without the need for aseparate vane• it can use track information from a SeaTalk navigation instrumentto provide waypoint control in Track mode• it can use boat speed from a SeaTalk speed instrument to optimizetrack-keeping performanceRudder position sensor (wheel drives only)On wheel drive systems you can fit a rudder position sensor toimprove the wheel pilot’s performance (see page 81). This isparticularly advisable if your boat’s steering system has significantbacklash, or you require optimum performance from a mechanical orcable steering system. By using the information from the rudder anglesensor, the ST4000+ will also be able to show the true rudder angle inStandby and Auto modes.Note: You MUST add a rudder position sensor if fitting the ST4000+to a hydraulic steering system.
