The SmartPilot Corepack functions as the central nervous system of every SmartPilot system and is comprised of a course computer (with NMEA inputs and outputs for interfacing with equipment from other manufacturers), a state-of-the-art, gimballed fluxgate electronic compass and a rudder-position reference unit.
In order to select the right SmartPilot corepack for your vessel you must first determine which autopilot drive unit is right for your steering system (see above).
All SmartPilot corepacks have the same features, but are available in three performance levels (S1, S2 and S3) depending on the drive unit requirements. Each corepack contains a SmartPilot course computer in either a standard configuration or a G version.
G version corepacks feature a built-in Rate Gyro sensor and Raymarine AST (Advanced Steering Technology). The Rate Gyro enables the AST software to monitor the motion of the vessel and actually anticipate rudder adjustments based on that information, as well as to adapt to changing sea conditions. The result is a straighter course, without instability or overshoot. This gyro-enhanced autopilot performance is especially valuable in difficult steering situations such as a downwind course in following seas. G version corepacks sample vessel motion 10 times more often than the non-G corepacks and are highly recommended for every installation - power or sail.