See FINA
How to use the device:
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At the start, the toes of both feet must be in contact with the end wall or face of the touchpad. Bending the toes over the top of the touchpad is prohibited.
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The ledge may be adjustable to 4 cm above or 4 cm below the water level.
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The ledge is a minimum of 65 cm in length.
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The ledge must be 8 cm in height, 2 cm at the width with 10 degrees of slope.
See the detailed diagram of the device
