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Packraft
Packraft and trail boat are colloquial terms for a small, portable inflatable boat designed for use in all bodies of water, including technical whitewater and ocean bays and fjords. A packraft is designed to be light enough to be carried for extended distances. Along with its propulsion system (collapsable paddles or lightweight oars) and safety equipment (PFD, clothing) the entire package is designed to be light and compact enough for an individual to negotiate rough terrain while carrying the rafting equipment together with supplies, shelter, and other survival or backcountry equipment. Modern packrafts vary from inexpensive vinyl boats lacking durability to sturdy craft costing over US $1,000. Most weigh less than nine pounds (4 kg) and usually carry a single passenger. The most popular propulsion systems involve a kayak paddle that breaks down into two to five pieces. Most often they are paddled from a sitting position, although kneeling can be advantageous in some situations.
==Pioneers==
Pioneering use of packrafts is difficult to trace, as float tubes, inner tubes, and other small boats can in some of their uses be considered equivalent to packrafts, and have been used around the world for over a century, beginning with the Halkett boat. However, Dick Griffith is documented to have used a packraft to descend Copper Canyon's Urique River (Chihuahua, Mexico) in 1952〔Dial, Roman. ''Packrafting! An Introduction and How-to Guide''. Beartooth Mountain Press, Bozeman, MT. 2008〕 before introducing them to the Alaska Mountain Wilderness Classic adventure race in 1982. Packrafts are now common equipment in that race.
A variety of companies have made durable packrafts in the past including Sherpa, Curtis, and American Safety. Furthermore, aviator emergency rafts have been used for packrafting purposes in a variety of applications. Pioneering use of packrafts generally consisted of using boats intended as pool toys or lake craft in moving water while carrying gear or passengers. The discomfort of these non-duarble boats led to the invention and marketing of the modern packraft.
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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