Raymarine forum

I upgraded the E-120 to seatalk ng adding ITC-5 and sealtak ng converter I added i70 instruments display New triducer depth speed and temp. and P70 autopilot control head, to a S3G AST Autopilot i have.
the P70 controls the Autopilot manually , however when E-120 is in GOTO mode it does not keep track and the autopilot does not follow, the track. any idea why?

Welcome to the Raymarine Forum oricohen,

Please create a a system diagram (hand drawn will generally suffice) identifying the makes and models of each of the marine electronics devices within the system (including computers / tablets running navigational planning / chartplotting applications). The diagram should additionally identify how these devices have been interfaced to one another. Please attach, scan, or take a photo of your system diagram and attach it to a reply to this thread.