OK let me explain. CDOs (continueous duty overnights) would no longer happen. ie duty on at 1900 fly 1 to 4 legs, go to a hotel, get 3-4 hours sleep, then fly back to your base and be done for the day. Then start again at 1900. The fatege (spelling) really sets in on the flight back with 3-4 hrs sleep. It gets worse if you throw in a time zone change. Do this 4 days in a row and the crews are zombies by the last day. I am sure that cargo guys get more rest on stand ups.