Granted I haven't done it in a smoke filled cockpit for real but I have done it many times in the Simulator. Using the Oxy whilst trying to read checklists, read the over head panel etc using glasses and then the distraction of the breathing through the speaker is a pain in the ass and I acknowledge the problem.
It certainly does increase the workload trying to remember to turn off the hot mic.....
Last edited by nitpicker330; 6th Feb 2013 at 09:04.