34 ST8001+ Smartpilot Controller Operating GuideGlossaryTerm MeaningAST Advanced Steering Technology (AST) is Raymarine’s unique advanced steeringalgorithm. It uses inputs from a wide variety of sensors to tune the autopilot’s oper-ation to provide superior control of the boat in any condition.AutoLearn Self-learning calibration feature available on S1G, S2G and S3G autopilot systems.AutoTrim The AutoTrim setting determines the rate at which the autopilot applies ‘standinghelm’ to correct for trim changes caused by varying wind loads on the sails or super-structure.AWG American Wire GaugeCE Marked on Raymarine products that comply with defined European Communitystandardscounter rudder Counter rudder is the amount of rudder the autopilot applies to try to prevent theboat from yawing off course. Higher counter rudder settings result in more rudderbeing applied.CR pump Constant Running hydraulic pumpDC Direct currentEMC(ElectromagneticCompatibility)When powered up, all electrical equipment produces electromagnetic fields. Thesecan cause adjacent pieces of electrical equipment to interact with one another, andthis can degrade their performance. By following the EMC guidelines in this hand-book, you can minimize these effects by ensuring optimum Electromagnetic Com-patibility (EMC) between equipment.Fluxgate Standard Raymarine compass supplied with course computer core packGPS Global Positioning SystemGyroPlus Raymarine’s GyroPlus yaw sensor that measures the boat’s rate of turn. It is builtinto the S1G, S2G and S3G course computers.I/O drive Inboard/Outboard or stern driveMOB Man overboardnm Nautical mileNMEA The NMEA (National Maritime Electronics Association) protocol is an internation-ally accepted serial communication interface standard for sharing data betweenelectronic equipment. Raymarine products can share information with non-SeaTalk equipment using the NMEA 0183 protocol.