enigma said:I don't know one professional pilot who would intentionally sleep
If you've got someone who habitually drops off, it is your duty to him/her to have a talk with that person.
Ok MR. pro standards... I know many very professional pilots that intentionally take a nap on long legs. Both NASA and the FAA know and have proven that a short nap sharpens a pilot mentally for the approach/landing. After one too many short overnights listening to sirens and gun shots all night, many would rather be sharp for the part of the flight where most of the accidents occur.
just my 2 cents.