Thank you very much for the feedback guys.
Another question on the matter; anyone know of companies around the world, particularly in the oil and gas industry, mandating EBS use for all pax and/or crew?
I have been putting together some figures of breath hold time abilities against the anecdotal stories of actual time from cabin submersion to escape and surface. So far there is quite a gap especially involving nationals from certain regions who do not display good confidence in the water.