Magnetic window shades

I've been looking at the Sailrite project How to make Magnetic Window Shades and it looks very simple and has the advantage that I wouldn't have to drill holes to mount snaps. We have just had the boat Awlgripped and I am worried about the adhesive snaps on the new finish. The boat has never had shades, so no mounting was ever in place.

I was wondering if the magnets would interfere with the navigation systems in the pilot house. Does anyone have experience with these?

Carol
Easy Wind
2000 Pacific Trawler 40
Nahant, MA

RVs have a system where the magnets are on the inside of the glass . Nothing on paint.

Sailrire articles even mentions an RV

Seem to have a good following.

As long as the magnets are not located next to your autopilot’s compass you will be fine. All other navigation is usually derived from GPS.