Aim time
The time the aiming circle takes to shrink by 60 percent of its width, not the time to become fully aimed.
Also known as aiming time, gun aim time.
This is the most misread number on a tank. A quoted aim time of 2.1 seconds is the time for the circle to lose 60 percent of its diameter, so a gun that has just bloomed hard is still settling well after its aim time has elapsed.
Full convergence takes roughly twice that in practice, and how long it actually takes depends on how wide the circle was to begin with, which is set by bloom rather than by aim time.
That is why aim time is read together with the dispersion penalties: a gun with a poor aim time and gentle bloom starts closer to aimed and gets there first.
Related terms
BloomThe widening of the aiming circle caused by moving, traversing or firing, and the reason a gun's paper accuracy is rarely what a player experiences.DispersionThe size of the aiming circle at any moment, which grows with movement and shrinks as the gun settles.AccuracyA gun's dispersion at 100 metres, in metres: the radius of the circle a fully aimed shot can land in, where lower is better.Gun handlingThe combination of accuracy, aim time and dispersion penalties that decides whether a gun hits what it is pointed at.