<P> FIBA officials wear a grey (torso) and black (sleeves) shirt, black trousers, black socks, and black shoes . Officials in competitions organized by Euroleague Basketball--the Euroleague and Eurocup--wear an orange shirt . Officials in the Israel Basketball Association wear the Euroleague's orange shirt but sometimes wear royal blue shirts for contests between two Israeli teams . NBL officials wear grey shirts with black shoulders and orange stripes on the sides . The NBL logo is atop the breast and a sponsor's name is on the back . Shirts are V - neck, without a collar, and pants lack belts . </P> <P> All officials wear a whistle that is used to stop play as a result of a foul or a violation on the court . Hand signals are used to indicate the nature of the infraction or to administer the game . </P> <P> In higher levels of college and professional basketball, officials wear a timing device on the belt - line called PTS (Precision Timing System). The device is used by on court officials to start and stop the game clock in a timely manner, rather than waiting for the scoreboard operator (timekeeper) to do so . </P> <P> The officials must ensure that the game runs smoothly, and this encompasses a variety of different responsibilities, from calling the game to player and spectator management . They also carry a duty of care to the players they officiate and to ensure that the court and all equipment used is in a safe and usable condition . Should there be an issue that inhibits the safe playing of the game, then it is the job of the officials to rectify the problem . Quite often, the job of an official surpasses that of the game at hand, as they must overcome unforeseen situations that may or may not have an influence on the game . </P>

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