Simrad AP Control Unit Search for: Advanced Search Place Ads for Silverton Boats Browse Ads for Silverton Boats Search Ads for Silverton Boats Simrad AP Control Unit Click to enlarge image. Contact Information Contact James Talbott Price: 25.00 More Information AC20 Autopilot Computer, worked when removed. AP25 Control/Display Unit, knob is broken. Worked when removed other than the knob. Price is total for both units. This Ad has been viewed 4 times.