the Northpole was sailed around as early as the summer of 2010 when Børge Ousland and crew did it in a Corsair 31 trimaran. I watched a TV program from that trip. It appeared to be very little ice, and the trimaran relied on speed and little draught as it was way too light to work as an ice-braker. It seemed that the worst "ice" they met was on the passing north of Russia - in the form of local bureaucracy...
Below is a link to a site which shows the route they took. The polar projection of the map is interesting.
Arne
https://www.devold.com/protection-no/aktuelt/aktuelt-2010/historisk-seilas-av-borge-ousland/183/0/