OffBlock

Term	OffBlock
Business term	Off-Block
Definition	Off-block is when the Aircraft starts moving from it’s AircraftParkingPosition as part of a flight departure process.
Allowed values
Comments	OffBlock times are very important for Airports. This is reflected in a set of OffBlock times used for different purposes. Another term used is off-chocks.
Status	Approved
XML type	N/A, Concept
AIRM equivalent	OffBlock
AIDM equivalent	N/A

Notes on the different off-block times and their relationship

ACI DD Term	Notes

ACI DD Term	Notes
ScheduledOffBlockTime	The Airline's schedule. Typically received in IATA flight messages or schedule files.
SlotScheduledOffBlockTime	The ScheduledOffBlockTime as received from the AirportSlot system. It should be the same as the ScheduledOffBlockTime, but might differ. Some Airports are not strictly slot regulated, or not slot regulated at all.
AirlineEstimatedOffBlockTime	The Passenger oriented estimated OffBlock time as received from the relevant Airline. This time is to a large extent to influence passenger behaviour (e.g go to gate).
EstimatedOffBlockTime	The Airline's operational OffBlock time from the FlightPlan. This is when the relevant Airline actually expect the Aircraft to start moving.
ProbableOffBlockTime	What the Airport consider the most likely/probable time for OffBlock. This is the Airport's version of EstimatedOffBlockTime. NB! ProbableOffBlockTime should always exist for any departing Aircraft.
PublicEstimatedOffBlockTime	This is the time that should be shown to the public/passengers when it differs from ScheduledOffBlockTime. There might also be restrictions on how early it's made available.
TargetOffBlockTime	The time that an Aircraft operator / handling agent estimates that an aircraft will be ready (all doors closed, boarding bridge removed, push back vehicle present, ready to start up) to push back immediately upon reception of clearance from the air traffic control tower.
PredictedOffBlockTime	A prediction based on information not usually available, for instance weather on other airports and en-route. Possibly from an AI system.
ActualOffBlockTime	When off-block actually happened.