High Altitude Endorsement
To fly an aircraft capable of flying higher than 25,000 feet (FL250), the FAA requires the pilot to have this logbook endorsement.
Ground and flight training covers high altitude aerodynamics, meteorology, aero-medical effects of high altitude, oxygen systems, pressurisation systems, normal and abnormal operations, and associated regulations.
This short course is usually done using a pressurised aircraft that you will be operating and have access to.
It can be accomplished in one day.
CAMFLIGHT has a suitably qualified FAA CFI to conduct this training and sign off