If you're fairly new to the 24 Hours of Spa, it would be easy to compare it to that other endurance classic, the 24 Hours of Le Mans.
However, while you have four defined categories showcasing different performance capabilities, this is a huge field of performance balanced sportscars across nine different manufacturers and models.
It means the cars are evenly matched from top to bottom, putting the emphasis on the drivers here. It means - more so than Le Mans - it is critical to stay on the lead lap.
Why? Well, if you are around 2mins behind but on the lead lap, a safety car will wipe much of that margin up as the pack bunches up.
If you're a lap behind, then you'll be bunched up with the lead pack + 1 lap... and even if you're quick, you'll still need to adhere to those blue flags!