One more FMS example. Required Time of Arrivals (RTA) are seldom seen on 757/767 even with Pegasus. It's about a $60,000 option and if the operator is not into FANS, they simply opt out. RTA's are usually found on Progress pages 3 or 4. There are a lot of 747's running around with minimal FMS packages. A few don't even have GPS, but that is becoming more rare as the years go by. I would not even begin to describe the options available for the 777 and soon to be 787.