| ETTT | Estimated Turn-round Time. The time estimated by the AO/GH on the day of operation to turn-round a flight taking into account the operational constraints. |
| ELDT | Estimated Landing Time. The estimated time that an aircraft will touchdown on the runway. (Equivalent to ATC ETA–Estimated Time of Arrival = landing). Always UTC time. |
| TLDT | Target Landing Time. Targeted Time from the Arrival management process at the threshold, taking runway sequence and constraints into account. It is not a constraint but a progressively refined planning time used to coordinate between arrival and departure management processes. Each TLDT on one runway is separated from other TLDT or TTOT to represent vortex and/or SID separation between aircraft. Always UTC time. |
| ALDT | Actual Landing Time. The time that an aircraft lands on a runway. (Equivalent to ATC ATA –Actual Time of Arrival = landing, ACARS=ON). Always UTC time. |
| SIBT | Scheduled In-Block Time. The time that an aircraft is scheduled to arrive at its first parking position. Always UTC time. |
| EIBT | Estimated In-Block Time. The estimated time that an aircraft will arrive in-blocks. (Equivalent to Airline/Handler ETA –Estimated Time of Arrival). Always UTC time. |
| AIBT | Actual In-Block Time. The time that an aircraft arrives in-blocks. (Equivalent to Airline/Handler ATA –Actual Time of Arrival, ACARS = IN). Always UTC time. |
| ACGT | Actual Commencement of Ground Handling Time.
The time when ground handling on an aircraft starts, can be equal to AIBT (to be determined locally). Always UTC time. |
| AEGT | Actual End of Ground handling Time. The time when ground handling on an aircraft ends, can be equal to "ARDT" (To be decided locally). Always UTC time. |
