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What autopilot module to choose, depends upon what drive units they control. Otherwise known as drive motors, these take signals from little electronic modules and/or display units, and move the tiller forcibly as the module or display commands.
The standard Furuno autopilot nowadays is the model 711C. Be it noted, this requires HRP11 or HRP17 Pump and FPS8 Power Steering Module(s), as options. ('Pump' often is used to refer to the motor that moves the tiller at direction.)
I don't know if you have those (pump(s) or power steering motor) yet, or not. Here's the advertising-and-breakdown on the 711C:
- Does that look like what you want and could use? I think the broader bigger of the two display modules shown might even be a handheld or 'remote'. But the smaller, a square-shaped display module, is probably the one you would have to mount in the control console.
- and, do you have the drive motors (or 'pump') listed as required options for the 711C ?