RD418HD out of sync with a97

[ssjohnson1]

OK....the Radar and the MFD installed last summer do seem to work great...except that I have to constantly adjust the offset of the radar scan (may not be using the correct verbiage here...) when I change directions. For example, when sailing down a coast (Michigan in this case) I have to adjust the radar image to match the chart for the shoreline... maybe 10-20 degrees. Then I am good....until I change directions. [censored]!
Once set for my system, should this need to be adjusted?? Is there something else I should be looking at? Is there an initial config that I have missed?? Sure would like to know if I have company or am just 'special'....
TIA

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum ssjohnson1,

The most common cause for the reported issue is incorrect heading data within the system. There are other possible reasons for the reported problem as well. Please click here to view a FAQ addressing this subject.