Originally Posted by
galaxy flyer
Hypoxia
Second, there is no need to use 100% while in cruise, even if the FAR requires wearing the mask.
GF
I guess you've never flown cargo planes with hazmat and noxious smells? It was just a thought to make an argument for a copilot to be utilized in a single pilot bizjet but since a Captain/CFI can log dual anyway it is a moot point!