I found a Facebook page where the Treshnikov crew of SPI-ACE people post videos and updates so I asked a question in comments-- "How can we independently verify location coordinates?".
ACE Expedition - Timeline
https://www.facebook.com/ACEexpedition/videos/1083508005110029/
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It's be interesting to see anyone answer. Frankly, I don't think they're doing a circumnavigation. There are no coordinates published on any map I can find and even if they were travelling roughly in the area they say they are, there are no photos of the stars to verify location at night. The entire thing is possibly a hoax like the solo-crossings of Antarctica or the Vendee races south of 60 degrees latitude.
ACE Expedition - Timeline
https://www.facebook.com/ACEexpedition/videos/1083508005110029/
It's be interesting to see anyone answer. Frankly, I don't think they're doing a circumnavigation. There are no coordinates published on any map I can find and even if they were travelling roughly in the area they say they are, there are no photos of the stars to verify location at night. The entire thing is possibly a hoax like the solo-crossings of Antarctica or the Vendee races south of 60 degrees latitude.