I have a 28' Radon Crab boat with a bravo 3 outdrive and i would like to know how the Raymarine ev 2

The Raymarine EV-200 is an autopilot system designed for boats up to around 30,000 pounds (13,600 kg) displacement. It's suitable for a variety of vessel types, including powerboats like your 28' Radon Crab boat. When it comes to slow-speed operation and cruising at 8-10 knots, the EV-200 should work well. At these speeds, the autopilot system will engage and steer the boat according to the course you've set. Since the EV-200 is designed to handle a wide range of boat speeds and conditions, it should be able to maintain course accurately even at slower speeds. However, it's important to note that factors such as sea state, wind, and currents can affect the performance of any autopilot system, including the EV-200. In general, at slower speeds, the system may need to make more frequent and subtle course corrections to maintain your desired heading. Additionally, proper calibration and setup are essential to ensure optimal performance of the autopilot system in all conditions.