blowing whistle for subs

[representing]

Horn is always used in this area (and several other areas I've officiated in). I use the whistle if I see the sub but don't hear the horn for a second or two. If more subs are coming running to the table, I blow the whistle again to let my partner know not to hand the ball yet.

For the most part though, the horn lets us know there is a sub at the table. Unfortunately not edible though