\n* Protective clothing and gloves to prevent abrasions –may be provided by the wetsuit\n* [[Buoyancy aid]]\n* Helmet\n* Shoes to provide grip on rocks\n* Wetsuit boots,trainers or canyoning boots (closed toes)\n* Throw line\n* Communications –hand-held VHF and/or mobile telephone\n* Knife\n",{"template":{"target":{"wt":"div col end","href":"./Template:Div_col_end"},"params":{},"i":1}}]}" id="mwbQ">.mw-parser-output .div-col{margin-top:0.3em;column-width:30em}.mw-parser-output .div-col-small{font-size:90%}.mw-parser-output .div-col-rules{column-rule:1px solid #aaa}.mw-parser-output .div-col dl,.mw-parser-output .div-col ol,.mw-parser-output .div-col ul{margin-top:0}.mw-parser-output .div-col li,.mw-parser-output .div-col dd{page-break-inside:avoid;break-inside:avoid-column}
When jumping into water from height, water resistance increases with the speed of entry, so entering the water at high-velocity induces rapid and potentially dangerous decelleration. [13] [14] [15] Jumping from a height of 20 feet (6.1 m) results in a person hitting the water at 25 mph (40 km/h). [14] Impacting with the water surface at this velocity is capable of giving a person temporary paralysis of the diaphragm, [13] a compressed spine, broken bones, or concussion. [14]
When diving and flipping into water along the intertidal zone there is an increased risk of receiving an injury including a spinal injury. [8]
Height falling from | Speed reached at water surface |
---|---|
5 feet (1.5 metres) | 12 mph (19 km/h) [13] |
10 feet (3 metres) | 17 mph (27 km/h) [14] |
20 feet (6.1 metres) | 25 mph (40 km/h) [14] |
50 feet (15 metres) | 38 mph (61 km/h) [14] |
85 feet (26 metres) | 53 to 62 mph (85 to 100 km/h) [14] |