Having done some flagging in a previous life, there are 3 versions of a yellow flag. Stationary, something ahead is not right, waving, something a head is really wrong with possible track blockage. OH $h^T waving big time, something ahead is really F-ed up. Good corner workers know the difference and when to exagerate the flag.
Red flags are ONLY displayed at the request of the Stewards in the tower. Corners can not self display a red or black flag.
I have heard that they only had one flagger per station. That flaggers primary responsibility is to wave the flag. Secondary to communicate with the tower. And 3rd to assist the driver. But with only a single flagger, he is required to remain at the corner station and wave the flag (his primary responsibility).
Think about how often us drivers miss a flag. And it is displayed at the same place every lap. We know (or should know) where to look. What are the chances that you would come into that corner station, not displaying a yellow and assumed "all is clear, go balls to the walls". Only to find the flagger in an unexpected location waving a flag. Receipe for disaster.
If the report I heard of minimal corner staff is true, NASA may want to impose new rules about minimum staff.
Dave
Dave Wheeler
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