@Ziljoe @GlennM @Suri
Ushma is a settlement where the river 'Reka Ushma' merges with the 'Reka Lozva'.
Many of us assume that the Dyatlov group had followed the Reka Lozva instead of turning left to the Reka Ushma.
The next screenprint of Google maps shows that it is unavoidable to at least note Ushma while travelling along the Reka Lozva.

I am pretty certain that the winter population of Ushma had differ from the summer population: in wintertime more Mansi may have stayed in Ushma.
Personally I have been triggered by Ushma, because in 2020 I wished to explore the scenery with MS Flight Simulator 2020.
The only quick manner to find this scenery on the map in MS Flight Simulator was looking for Ushma; Vizhay, Ivdel did pop up only after zooming many times more.
While exploring the scenery by air, I had been alerted by the steepness of the ascend from the storage to the tent site, because I have crashed a few times with a lightwing airplane because it could not climb fast enough in the valley at the end of the river/stream near the storage.
Studying the maps available on Dyatlovpass.com showed that the ascend from the storage in the direction to the tentsite was some 30 % over a distance of 1 km. A lightwing airplane is not able to do so.
Walking on socksWithin my timeline, the group member - except Semyon, Lyudmila and Thibo - had descended to the ravine cedar on socks, because part of the surface between the tent site and cedar/ravine had been icy (caused by the pressure wave melting the snow that had refrozen as ice).
Remark: Within this timeline:
- Semyon, Lyudmila and Thibo had descended before the pressure wave had hit the area. Semyon and Thibo had been found with footware different from socks.
- Lyudmila had been standing next to the stream to clean herself
- the three had descended for running water and firewood to be brought back to the tent site.
Three sources support the icy surface between the tent site and the ravine/cedar:
- the photo in question from the tentsite: some 50 meters below starts a band with hardly any snow
- if I remember well, a member of the search party had stated that the stone band between the tent site and ravine had been icy. He assumed that the group member may well have slided downhill, to be injured while being stopped by stones
- Zinaida in the mortuary with natural fibers affixed to her trousers. As explanation for lying down on a thin layer of ice with natural fibers that had melted by her body temperature still around 25 degrees Celsius, while the natural fibers had been refrozen affixed to her trousers.
The group member did not have crampons with them, so they had walked on socks.
Quote from a Newpaper article in "The Guardian":
"
Wearing socks over footwear significantly reduced the self-reported slipperiness of icy footpaths and a higher proportion of sock-wearers displayed confidence in descending the study slopes. The only falls occurred in people who were not wearing (external) socks."
See:
https://www.theguardian.com/education/2010/mar/09/improbable-research-icy-socks-over-shoes#:~:text=This%20one%20did.,wearing%20(external)%20socks.%22