Glossary 39GlossaryTerm MeaningAST(Advanced Steer-ing Technology)AST (Advanced Steering Technology) is Raymarine’s unique advancedsteering algorithm. It uses inputs from a wide variety of sensors to tune theautopilot’s operation to provide superior control of the boat in any condi-tion.AutoLearn Self-learning calibration feature available on S1G, S2G and S3G sys-tems.AWG American Wire GaugeCE Marked on products that comply with defined European Community stan-dardsCR pump Constant Running hydraulic pumpEMC(ElectromagneticCompatibility)When powered up, all electrical equipment produces electromagneticfields. These can cause adjacent pieces of electrical equipment to interactwith one another, and this can degrade their performance. By followingthe EMC guidelines in this handbook, you can minimize these effects byensuring optimum Electromagnetic Compatibility (EMC) between equip-ment.Fluxgate Standard Raymarine compass supplied with core packGPS Global Positioning SystemGyroPlus Raymarine’s GyroPlus yaw sensor that measures the boat’s rate of turn. Itis built into the S1G, S2G and S3G systems.Hz Hertz (cycles per second)I/O drive Inboard/Outboard or stern driveMARPA Mini Automatic Radar Plotting AidNMEA The NMEA (National Maritime Electronics Association) protocol is aninternationally accepted serial communication interface standard forsharing data between electronic equipment. Raymarine products canshare information with non-SeaTalk equipment using the NMEA 0183protocol.SeaTalk SeaTalk is Raymarine’s proprietary communication system. It links prod-ucts to provide a single, integrated system sharing power and data.SeaTalk bus This refers to the continuous SeaTalk system connecting together aseries of Raymarine units.Yaw Boat’s rate of turn (°/sec)