|
Blue means you are being shortly being caught by a faster moving car of which you may not be aware, thus it's entirely legitimate to show a blue for unlapping (or even overtaking) as it is purely advisory. If as a driver you know that it's a position you're fighting for then you're at liberty to not allow it through easily. The flaggie wouldn't know how many times you'd been (un)lapped so continues to provide information.
I was once told:
Y&R means look down, there's something that might cause you a problem.
Y means look around, you might cause a problem to someone else.
DY means look ahead, you might hit something you don't want to.
So to answer the particular question, if the debris in the track is something that could cause damage to something hitting it, then you need a yellow.
The most memorable briefing I heard went as follows (the asterixes indicate a rude word beginning with sh).
Yellow/Red = there's **** on the track.
Yellow = ****
Double yellow = oh ****
Green = **** happened
Red = ****, **** , ****
Blue = you're ****
Black/orange = your car's ****
Black/white = you're in the ****
|