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 ...
Andrea del Verrocchio (1435 â 1488), born Andrea di Michele di Francesco de' Cioni, was an Italian sculptor, goldsmith and painter who was master of an important workshop in Florence. Few paintings are attributed to him with certainty, but a number of important painters were trained at his workshop.