During a game, sweepers might call out numbers. These numbers indicate how far the sweepers think the rock in play will travel. This system is relatively new to the game and is often attributed to the Randy Ferbey rink since they were the first major team to use the system, but it is not known whose idea it originally was.
Diagram that shows the number weight calling system as it relates to the ice surface. The tee line has been contained within the button to avoid confusion.
