https://raymarine.custhelp.com
If you haven't upgraded C-series firmware in the past 6 months, you would be in for a pleasant surprise, they added a LOT of features to the C120, C80, C70. One of their biggest improvements is controlling most of a Raymarine auto pilot directly from the chart plotter. They also added range rings around your position (on the chart, rhe radar already had that). With this new WAAS issue, I'm sure they will upgrade the E-Series soon, hopefully adding the auto pilot controll.
If you have non-Raymarine, you may still be affected if you use WAAS (much more accurate GPS positioning).



