The first step in selecting an autopilot is selecting the proper drive unit for your vessel. Raymarine autopilot drive units are available in array of sizes and configurations to accommodate various steering system types and vessel displacements.
To properly select an autopilot you will need to find out what type of steering system is installed. This may involve opening a few hatches and taking a peak at the gear, or this can be a simple as consulting your boat dealer or boat manufacturer.
Drives For Vessels With Hydraulic Steering Systems
Drives For Vessels With Mechanical Steering Systems
Drives For Vessels With Inboard/Outboard Engines and Power Assisted Steering