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Police whistles are commonly used by referees and umpires in sporting events. The cross-section of a common whistle is shown in the figure on the right. The cavity is a closed-end cylinder ( 3 ⁄ 4 in (19 mm) diameter), but with the cylinder axis lateral to the jet axis.
Joseph Hudson (1848–1930) was an inventor in Birmingham, England during the late 19th century and the founder of J Hudson & Co in 1870, later to become the world largest whistle manufacturer . Hudson entered a competition held by the Metropolitan police force in London in 1883 to design a better way of attracting people's attention.
The double dual system uses three referees, all equipped with whistles, positioned much as in the traditional diagonal system of control mandated by IFAB. [17] Each referee has the same authority for decision making. [18] It is authorized in the United States for college and high school matches although it is rarely used.
Football officials are commonly, but incorrectly, referred to collectively as referees, but each position has specific duties and a specific name: Common positions include referee (which is the lead member of the officiating team), umpire, head linesman (or down judge), line judge, field judge (or back umpire), side judge, back judge and center ...
The reversal sent Smart into an angry, finger-wagging argument with head referee Matt Loeffler on the sideline as Texas fans roared with excitement. ... Smart pointed the finger at ESPN.
American Hockey League (former NHL) referee Dean Morton In ice hockey , an official is a person who has some responsibility for enforcing the rules and maintaining the order of the game. There are two categories of officials, on-ice officials , who are the referees and linesmen that enforce the rules during gameplay, and off-ice officials , who ...
FILE - Referee Stephanie Frappart gives directions during the French Cup final soccer match between Nice and Nantes at the Stade de France stadium, in Saint Denis, north of Paris, Saturday, May 7 ...
Metal whistle similar to that used by most referees. Rugby union match officials must use the following equipment: Coin The referee organises a coin toss with the team captains to decide who kicks off and what end each team takes initially. [5] Whistle Referees must carry a whistle to indicate certain occurrences in the game. [6] Red card
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