Pretty sure you can shave faster than that …
Having now read the article after posting first (in the greatest of all FR traditions), I can envision an alternate solution:
1) Require the sailors in positions which require a mask at any time to sign a waiver that they understand they will die, and nobody can be counted on to save them, because they’ll be quite busy, AND
2) Put them in positions in which nobody will be relying on them when the fire (or whatever) breaks out, so that they are not risking anyone else’s lives for failing to do their work.
That would be a really tough bar to achieve, but I could see it.