裁判的小蓝旗是什么意思？

heraclues

裁判除了犯规时扔的小黄旗，在球权转换以及掉球的时候还会扔一块很小的蓝旗，有达人能解释下这个蓝旗的具体作用么？

GodofSun

球权转换发生的地点，以备球权转换之后有犯规需要判罚码数的时候用。。。

连过五人Y

严格来说，他们仍的不是blue flag，是blue bean bag，不知道怎么翻译，呵呵。
作用和楼上说的差不多。这是原文：
Bean bag
Used to mark various spots that are not fouls but which may be possible spots of penalty enforcement or illegal touching of a scrimmage kick. For example, it is used to mark the spot of a fumble or where a player caught a punt. It is typically colored white, blue, or orange, depending on the official's league, college conference, level of play, or weather conditions. Unlike penalty flags, bean bags may be tossed to a spot parallel to the nearest yard line, not necessarily to the actual non-penalty spot.