[bigwhistle]

If I am totally convinced that my partner was the only one in the arena who does not know that the ball was out of bounds off of a certain color, I will come to him/her with my hand up. There will be no whistle, as this will draw the attention of everyone in the building to me. If my partner has a reason for making the call the way he/she did, he/she will give me a stop sign. This tells me that he/she saw the play and has a reason for making the call that was made.

If I blow the whistle, my partner is somewhat forced to change the call. If I go and offer advice and then the call remains the same, it looks as if the crew is not working together.