(This question is, for the time being, theoretical.)
After watching a beautiful video compiled from photographs taken from the International Space Station, I noticed the labels of the Soyuz vehicle (СОЮЗ) and Progress module (ПРОГРЕСС) and began to wonder about writing orientation in situations where body position relative to the text baseline can't be guaranteed.
Enormous labels of things you expect to see are probably not a good example, since the reader will be primed to look for them. But what about other things like warnings or manual interface labels?
Take the following example of a button that does something (say, activates a fire-suppression system) and its label(s). Do any of these work? If so, which would be preferred? Is it even a problem to begin with?
Or would it be a better idea to do away with text entirely design a symbol that represents the 'thing' in any orientation (a snowflake is a convenient example).