How is this calculated

*exactly?*

Presumably the organizer has a moto with both groups.

Is it the motos that have the GPS on them or something on the rider's bikes?

Either way, we now know the position and speed of both groups.

Seems to me the best way to show a gap would be to (assuming it is known) display the time the 1st group took to arrive at their current position from the

current position of the trailing group.

The downside of this method is that if the chasers are fresher, they will naturally take less time to cover the distance than the leaders and thus the gap

will be (slightly) overstated. But its the best method i can think of.

Is this how it works?

Other options could be to take the speed of the chasers and the gap distance to make the calculation, but this would not be accurate if the terrain changes and would work

terribly if there is climbing or descending involved

Would love to know how these gaps get calculated.