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Basic line marking machines for turf were available by the late 1800s. [1]: 40 They were originally developed for use on lawn tennis courts.[1]: 40 One of the first such machines, a wheel-to-wheel paint transfer device, was developed by F.H. Ayres and "would be instantly recognizable by users of many of today's machines, which work on the same principle".
In sports, a hash mark or hash line is a short line/bar marking that is painted perpendicular to the sidelines or side barricades, used to help referees and players recognize on-field locations and visually measure distances. Hash marks serve the same function as the graduated markings on measuring tools such as rulers.
Most records are subject to ratification by the governing body for that record. On the world level, that is World Athletics.Each body has their own procedure for ratifying the records: for example, USA Track & Field (USATF), the governing body for the United States, only ratifies records once a year at their annual meeting at the beginning of December.
In running events up to 200 m in distance and in horizontal jump events, wind assistance is permitted only up to 2.0 m/s. In decathlon or heptathlon, average wind assistance of less than 2.0 m/s is required across all applicable disciplines; and maximum of 4.0 m/s in any one event. As an exception, according to rule 36.2, specific event ...
Marmot is an outdoor recreation clothing and sporting goods company founded in 1974 as "Marmot Mountain Works". [1] The company was founded in Grand Junction, Colorado by local resident Tom Boyce and two University of California, Santa Cruz students, David Huntley and Eric Reynolds, who shared the common goal of making their own mountaineering equipment.
The 1st and Ten line displays the yard line needed for a first down during an ESPN Sunday Night Football broadcast.. 1st & Ten is a computer system that augments televised coverage of American football by inserting graphical elements on the field of play as if they were physically present; the inserted element stays fixed within the coordinates of the playing field and obeys the visual rules ...
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