Importance to Members. Most pilots don't think too much about using portable oxygen. Sure, everyone knows that you have to use supplemental oxygen if you fly more than 30 minutes at cabin pressure altitudes of 12,500 feet or higher. And that at cabin altitudes above 14,000 feet pilots must use oxygen at all times.
Andrea Naversen is a veteran newscaster, network television correspondent, newspaper reporter, magazine editor, author and actress. She is currently ...
1 In Croatia, Serbia and Slovenia, Andrea is a feminine name; Andreja can be used as female name, while Andrija, Andro and Andrej are masculine forms. 2  The only exception is Istria, where Andrea is a male name. 3  In Romania Andreea is a feminine name and it is written with an extra e.