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Not sure if your running the 943 and which dome I am running a 18in fantom and I have a heading sensor , I needed to do a calibration test so the radar overlay matched the chart. The manual said do a 1 1/2 circle keeping the boat level in either direction best I could get was 87% , then I matched my compass heading with my GPS on NSEW all were plus or minus 1 degree. I think this is recommended even with out the heading sensor
Posted from my iPhone/Mobile device
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