The highest mapped point of land on Greenland near the coast is about 2180 metres above sea level. From this point of land, an observer can see roughly 182 kms, or just under half way across the Davis Strait to Baffin Island. On Baffin Island, mountain peaks are somewhat higher, although exact elevations haven't been mapped. However, it would most certainly be possible to see the cloud formations that are only associated with land and that were well known to Viking seafarers. The climate of northern Europe is warming.
Drift ice is rare south of the Arctic Circle.
This warm period continues until about the year 1200. Drastic changes in the Earth's climate can occur within decades. The remains of that Viking settlement are preserved and protected today by the Federal Government of Canada at L'Anse aux Meadows. It remains the only authenticated Viking settlement in North America. Leif Eiriksson and his crew leave L'Anse aux Meadows and return to Greenland.