It is common to see skiers moving on glacial terrain, unroped. Anytime you are on a "wet" glacier -- a glacier with snow on it -- there is the possibility of a crevasse. That said, your skis do create less force on the snow than walking does, so you can get away with a little bit more than you can in spring and summer mountaineering on foot.
Ross Berg, a Canadian guide, talks about glaciers and what he considers before roping up on a ski mountaineering program.
Ross lists three considerations at the end of his video:
Familiarity -- Do you know the area? Have you seen it without snow on it?
Familiarity -- Do you know the area? Have you seen it without snow on it?
Visibility -- Can you see, or are you in a white-out? Everything is more dangerous when you cannot see.
Snowpack -- Do you have a good snowpack? Are the crevasses filled in or covered by a lot of snow?
He also notes that you should be conservative until you have more skill and knowledge at reading glaciers and understanding them...
--Jason D. Martin
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