In that “range of possibilities” I assume you count the possibility that this was just a freak accident that could happen to anyone navigating in an area like NE Greenland, where charts are unreliable?
Yes that would be possible in limited areas which is accessible year around and visited regularly.
Alpefjord is “ice free” and navigable only a few months in late summer/early autumn and bottom contours is changing from season to season.
PS>Alpefjord is part of Scoresbysund, one of the southernmost and most accessible of the many fjords within NE Greenland National Park:
Still only visited by a few expedition cruise ships in the season.