Mr. Optomistic - you have me scratching my head. I'm not and never have been a pilot. (Near Mr. Magoo eyes pretty much guaranteed that. But I could focus on 1 mil gold wires on integrated circuits just fine.)
Seriously, discussions in this forum and one of its predecessors has led me to believe that one of the people in the cockpit is supposed to have his mask on at all times. Is that an incorrect understanding on my part?