Gerardus Mercator was born in 1512 and invented the famous Mercator projection showing the planet on a square. Although this cylindrical projection maps Africa smaller as Greenland it is still used (Google Maps) because the linear scale is equal in all directions. His son Arnold made the first exact map of Cologne, where I'm writing these lines.
I'm ready to discuss below the medieval opening of the Northern Sea Route as seen above and any circumnavigation of Greenland, however I'm more interested in this circle of (ice) bergs.
Click image to zoom.