Mr. Declan Fitzpatrick:

That is coming from the air traffic control. All these SIDs are programmed into the flight management computer so the pilot can select. For example, he might be told to take Liffey 1. This is the nomenclature that is used. He will select that on his flight management computer. That will give him all the waypoints on his display along that procedure. It is kind of like a Garmin or moving map in a car. It is the same kind of concept on where he has to go, what heights to climb etc., the whole way out to the end of the SID.