Here is a letter describing the training syllabus for a Panagra pilots in 1946. New hires started as Apprentice Co-Pilot and were then promoted to Junior Co-Pilot. The next step up was Class C where you could be assigned to flight duty. To make Class C, you had to successfully complete training in take-offs and landings in “line equipment”. Class B co-pilots received primary Douglas flight training and were fully qualified to fly from the right seat in line operations. Class A co-pilots received basic Douglas flight training and were allowed to fly in line operations in the left seat with a check airman in the right seat. Reserve Captains received advanced Douglas flight training and had to obtain an ATP.
