At the core of every Reactor 40 corepack is Garmin's 9-axis Attitude Heading Reference System (AHRS), a solid-state sensor package that can be mounted in effectively any orientation on the boat rather than needing to be perfectly level, simplifying installation versus older mechanical-gyro autopilot cores. Reactor 40 systems include Garmin's Shadow Drive technology, which lets the helmsman take back manual control instantly just by turning the wheel, with the autopilot automatically standing down rather than fighting the driver. For steer-by-wire boats specifically, the corepack talks directly to the boat's electronic steering controller rather than driving a separate hydraulic pump, giving smoother integration on boats that were built steer-by-wire from the factory.