irl cruise speeds are never fixed and constant like 0.80, 0.81, 0.82 etc, they are fully controlled by the flight computer according to the cost index, unfortunately in infinite flight, we don’t have this tool, so we take a default speed (more used), in this case the M 0.82.
basically, each airlines chooses its cost index, in the case of the blue one on the A339 is 4, where most of the time is flown in M 0.82
See you next time!
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