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New Autopilot

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AndyS View Drop Down

Joined: 14 June 2016
Location: River Dunes, NC
Status: Offline
Points: 91
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    Posted: 16 July 2018 at 16:58
Several weeks ago our autopilot computer stopped working. It is the Simrad AC12 that came with the boat. Evidently this computer is a little undersized and there are known voltage issues associated with its interaction with the Jefa steering. My electronics guru (Pete at Seacoast Marine in Oriental, NC) was aware of the AC12 issues, and that Simrad had recommended a relay be placed in the system to avoid problems. The bottom line is that the AC12 units were probably not the best choice, but having a relay in the system would be good. There was no salvaging our AC12, so we have now upgraded to the NAC-3 computer and that necessitated swapping the AP24 control head for the newer AP44 control head. All seems to work very well now, and is working well with our Zeus3 MFD. I did the dockside and sea trial installation this past weekend, and that was very easy using the autotune feature. There are - however - many adjustments that can be done to the system: rudder gain, turn rate, counter rudder, autotrim, etc. All of these have default values, but wondering if anyone has advice about what changes you have made to these parameters that are specific to the 385 and make the system work better with respect to steering, etc. Seems like there are an endless number of modifications that affect how the boat will steer. 
NOTE: Here is a link to a discussion about the relays ( and apologies if this has been discussed before - couldn't find it on the forum. 
River Dunes, NC
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