
PRACTICE AND QUALIFYING SESSIONS: Show the blue to a racer to indicate that a faster vehicle is approaching and will want to pass SOON (in your turn or the next one.) The racer will often acknowledge with a point by to the other vehicle. The blue flag DOES NOT INDICATE THAT A RACER NEEDS TO CHANGE HIS/HER LINE; it indicates that they need to check the mirrors, be aware, and not make any stupid moves that will turn a pass into a collision. Unlike the emergency flags we've been discussing, the blue flag is a message to a specific vehicle, so must be shown quickly when that vehicle enters the flagging window and put away so as not to confuse too many other people. Watch experienced blue flaggers for technique; practice is the only route to getting good at this.BLACK FLAG: This flag means "GO TO THE PITS", and has several uses.
RACES: During a race, the blue flag is ONLY shown to a vehicle that is about to be LAPPED. This requires the flagger to be aware of who the lead vehicles are, who the back-of-the-pack vehicles are, and their relative positions. You also need to be aware of vehicles that may have lost enough time in the pits because of mechanical problems or penalties to allow them to be lapped despite their initial positions. Practice and concentration are the keys here, and it's not adequate to just keep track of the leaders. In longer races, especially with mixed vehicle types or driver skill, it is not uncommon to have to blue the racer who is three laps down and getting passed by the one who is only two laps down, etc. Practice, practice , practice; it's a challenge, but it's also the most fun flagging you can do.
The black flag may be given to INDIVIDUAL vehicles for a number of reasons, and this is done only at DESIGNATED black flag stations. These will usually include the starter. At Sears Point, black flag stations are Turn 5 and Turn 9 as well as starter; at Laguna it is Turn 7 and starter. Race Control will request a black flag by saying "Post car 17". (See communications section for more detail.) The posted racer will be shown an open black flag and a number board with the car number at the black flag stations. If a vehicle is being posted for mechanical reasons the MECHANICAL BLACK , or "meatball", a black flag with a red or orange circle in the middle will be shown. If a racer is being reprimanded but not penalized with a pit stop, he/she will be shown a furled (closed) black flag at the starter stand only. The two turns before the black flag station will "spot" the posted car as it comes through, the first giving color and the second giving position, to assist the black flag station.RED FLAG: this is rarely used and some groups don't use it at all. It means it may not be safe to proceed to the pits; the racer should pull over at the first opportunity, and then proceed cautiously to the next turnworker and wait for their instructions. A red flag is shown at all stations. An example of a red flag situation was a car upside down and burning in the middle of the track at Turn 10 at Sears. In this case the route to safe pitting is obstructed.
BLACK FLAG ALL is a full course black, meaning all stations show a black flag. This is used when it is necessary to get the whole pack to pit, for instance because a really messy incident needs to be cleaned up, or it's just started hailing. Under this flag all cars proceed cautiously to the pits, and wait for the session to be resumed.