Just a question to provoke a little thought. There are certain docs which are required to be carried in the aircraft when you fly (Airworthiness, medical, POH, etc... sometimes even your pilot's logbook). Which of those, if any, can be carried as an electronic version (i.e. - excel file of PDF file) on a small thumbdrive? How about as images on a device such as an iPhone?
... just for a thought exercise.
... just for a thought exercise.