https://www.miamiflightacademy.com//wp-content/uploads/2014/11/MiamiFlightAcademy.png00Miami Flight Academyhttps://www.miamiflightacademy.com//wp-content/uploads/2014/11/MiamiFlightAcademy.pngMiami Flight Academy2018-05-22 17:27:212018-05-22 17:27:21If an unpressurized aircraft is operated above 12,500 feet MSL, but not more than 14,000 feet MSL, for a period of 2 hours 20 minutes, how long during that time is the minimum flightcrew required to use supplemental oxygen?