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Fully automatic time
Fully automatic time (abbreviated FAT) is a form of race timing in which the clock is automatically activated by the starting device, and the finish time is either automatically recorded, or timed by analysis of a photo finish. The system is commonly used in track and field as well as horse racing, dog racing, bicycle racing, rowing and auto racing. In these fields a photo finish is used. It is also used in competitive swimming, for which the swimmers themselves record a finish time by touching a touchpad at the end of a race. In order to verify the equipment, or in case of failure, a backup system (typically manual) is usually used in addition to FAT.〔For example the USA Swimming (Guide to Officiating ) requires that "() (because of the potential for failure) and always to verify proper operation, all times from electronic timing equipment (whether touchpads or buttons) must both be verified and backed-up by another timing system. The backup must always include at least one stopwatch."〕
==Technology==
In races started by a starting gun, a sensor is typically attached to the gun which sends an electronic signal to the timing system when fired. An alternative starting light or sound which is electronically triggered, such as a horn, is typically also wired to the timing system. In sports that involve a finish line that is crossed (rather than a touch finish, as in swimming), the current finishing system is a photo finish which is then analysed by judges.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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