Well, perhaps you can explain the pressurization schedule for the T-45? With the T-45 at 14,000 feet the cockpit is already at 10,000 and the crew has to be using OBOGS air. In the T-2 the aircraft can be above 23,000 feet and the cockpit is at 8,000 feet and the crew does not have to be using supplemental oxygen which is an entirely separate system available anytime the crew elects to use it.