Not sure if this is right but: before the crash the phrase "takeoff" could be used at any point ie "Request takeoff clerance" or "after takeoff turn left/right ect...." Now the phrase "Departure" is used instead and "Takeoff" is only used when clearing the aircraft in question for take off, "abc123, cleared of take off runway 18"
Stand to be corrected by any ATCOs out there. (or any one else for that mater!)