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					Originally Posted by blindofficial
					
				 
				During our pregame, my partner and I go over who watches the clock at the end of the period, depending on the situation (where the ball is at etc). We also use a signal to remind each other who is doing what. Whoever has the clock, blows there whistle at the end of the quarter. 
			
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 I thin the horn is so you don't have to watch the clock and you can watch the action on the court.