The umiak , umialak , umiaq , umiac , oomiac , oomiak , ongiuk , or anyak is a type of open skin boat , used by the Yupik and Inuit , and was originally found in all coastal areas from Siberia to Greenland . First used in Thule times, it has traditionally been used in summer, for moving people and possessions to seasonal hunting grounds, and for hunting whales and walrus . Although the umiak was usually propelled by oars (women) or paddles (men), sails—sometimes made from seal intestines —were also used, and, in the 20th century, outboard motors . Because the umiak has no keel, the sails cannot be used for tacking .
76-467: Like the kayak , the traditional umiak was made from a driftwood or whalebone frame pegged and lashed together, sometimes with antlers or ivory, over which walrus or bearded seal skins are stretched. Oil, usually from seals, would be used to coat and waterproof the seams. A large umiak, 9.1 m (30 ft), would require that about seven skins be sewn together, stretched over the frame and allowed to dry. Modern versions are essentially identical, with
152-450: A de facto motorboat ). The kayak was first used by the indigenous Aleut , Inuit , Yupik and possibly Ainu people hunters in subarctic regions of the world. Kayaks ( Inuktitut : qajaq ( ᖃᔭᖅ Inuktitut pronunciation: [qaˈjaq] ), Yup'ik : qayaq (from qai- "surface; top"), Aleut : Iqyax ) were originally developed by the Inuit , Yup'ik , and Aleut . They used
228-494: A " sprayskirt ", because it is donned like a skirt before entering the boat. "Sprayskirt" is the more common term in the US. Spraydecks for traditional kayaks are narrower, to fit narrow custom-fitted cockpits; mass-produced kayaks have larger cockpits and the spraydeck must therefore be wider at the hem. On a canoe, the spraydeck is secured to the outside of the hull with string or cords to either adhered or riveted installation loops or
304-502: A canoe, it is not only a safety item but may also be used for comfort. During rainy, windy and or cold weather, it keeps the lower body of the canoeist drier, warmer, and helps prevent water from building up a puddle at the bottom of the boat. The most appropriate material depends on the temperature/time of year and on the type of water being paddled. Whitewater spraydecks are made totally from neoprene, whereas flatwater touring/sea kayak spraydecks may be made from either material. Sealskin
380-570: A combination thereof, and a skin of water-resistant and durable fabric. Many types have air sponsons built into the hull, making the kayak float even if flooded. Most modern kayaks differ greatly from the original traditional subarctic kayaks in design, manufacturing and usage. They are often designed with computer-aided design (CAD) software, often in combination with CAD customized for naval design. Spray deck A spraydeck ( sprayskirt in N. America, akuilisaq or tuiitsoq in Greenland)
456-434: A day. Joined by other European manufacturers, by the mid-1930s there were an estimated half-million foldboat kayaks in use throughout Europe. First Nation masters of the roll taught this technique to Europeans during this time period. These boats were tough and intrepid individuals were soon doing amazing things in them. In June 1928, a German named Franz Romer Sea kayak rigged his 6.1 m (20 ft) long foldboat with
532-666: A few companies, priced US$ 4,000 and up. An experienced woodworker can build one for about US$ 400 in 200 hours, though the exact cost and time depend on the builder's skill, the materials and the size and design. As a second kayak project, or for the serious builder with some woodworking expertise, a strip–built boat can be an impressive piece of work. Kits with pre-cut and milled wood strips are commercially available. Skin-on-frame (SOF) boats are often more traditional in design, materials, and construction. They were traditionally made with driftwood frames, jointed, pegged , and lashed together, and covered with stretched seal skin, as those were
608-509: A foldboat or folding kayak (German Faltboot or Hardernkahn) became widely popular in Europe beginning in 1907 when they were mass-produced by Johannes Klepper and others. This type of kayak was introduced to England and Europe by John MacGregor (sportsman) in 1860, but Klepper was the first person to mass-produce these boats made of collapsible wooden frames covered by waterproof rubberized canvas. By 1929, Klepper and Company were making 90 foldboats
684-489: A garment that was stretched over the rim of the kayak coaming and sealed with drawstrings at the coaming, wrists, and hood edges. This enabled the " eskimo roll " and rescue to become the preferred methods of recovery after capsizing, especially as few Inuit could swim; their waters are too cold for a swimmer to survive for long. Instead of a tuilik , most traditional kayakers today use a spray deck made of waterproof synthetic material stretchy enough to fit tightly around
760-424: A general rule, a longer kayak is faster: it has a higher hull speed . It can also be narrower for a given displacement, reducing the drag, and it will generally track (follow a straight line) better than a shorter kayak. On the other hand, it is less maneuverable. Very long kayaks are less robust, and may be harder to store and transport. Some recreational kayak makers try to maximize hull volume (weight capacity) for
836-631: A given length as shorter kayaks are easier to transport and store. Kayaks that are built to cover longer distances such as touring and sea kayaks are longer, generally 4.9 to 5.8 m (16 to 19 ft). With touring kayaks the keel is generally more defined (helping the kayaker track in a straight line). Whitewater kayaks, which generally depend upon river current for their forward motion, are short, to maximize maneuverability. These kayaks rarely exceed 2.4 m (8 ft) in length, and play boats may be only 1.5–1.8 m (5–6 ft) long. Recreational kayak designers try to provide more stability at
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#1732854926835912-472: A heavily rockered boat is less likely to lock into the wave as the bow and stern are still above water. A boat with less rocker cuts into the wave and makes it harder to turn while surfing. The overall width of a kayak's cross-section is its beam . A wide hull is more stable and packs more displacement into a shorter length. A narrow hull has less drag and is generally easier to paddle; in waves, it will ride more easily and stay dryer. A narrower kayak makes
988-502: A higher center of gravity. A paddler with narrow shoulders will also want a narrower kayak. Newcomers will often want a craft with high primary stability (see above). The southern method is a wider kayak. The West Greenland method is a removable pair of outriggers, lashed across the stern deck. Such an outrigger pair is often homemade of a small plank and found floats such as empty bottles or plastic ducks. Outriggers are also made commercially, especially for fishing kayaks and sailing. If
1064-417: A kayak feels when put on edge or when waves are passing under the hull perpendicular to the length of the boat. For kayak rolling , tertiary stability, or the stability of an upside-down kayak, is also important (lower tertiary stability makes rolling up easier). Primary stability is often a big concern to a beginner, while secondary stability matters both to beginners and experienced travelers. By example,
1140-453: A keel allows it to be carried over the drift or shore ice to the open water by a few people. A modern company which trains people to hand make umiaks says that a 7.3 m (24 ft) boat weighs about 68 kg (150 lb) compared to 340 kg (750 lb) for a modern vessel. Although the usage of the umiak and the kayak has died out in most areas of the Arctic it is still very much
1216-470: A low center of gravity (COG) will find all boats more stable; for a paddler with a high center of gravity, all boats will feel tippier. On average, women have a lower COG than men. Women generally may fit a kayak about 10% narrower than the kayak that would fit a similarly sized man. Commercial kayaks made for women are rare. Unisex kayaks are built for men. Younger children have proportionately smaller and lighter bodies, but near-adult-size heads, and thus
1292-406: A machine. The deck and hull are often made separately and then joined at a horizontal seam. Plastic kayaks are rotationally molded ('rotomolded') from a various grades and types of polyethylene resins ranging from soft to hard. Such kayaks are seamless and particularly resistant to impact, but heavy. Inflatable kayaks are increasingly popular due to their ease of storage and transport, as well as
1368-561: A more angular shape, with gunwales rising to a point at the bow and stern ; and East Greenland kayaks that appear similar to the West Greenland style, but often fit more snugly to the paddler and possess a steeper angle between gunwale and stem , which lends maneuverability. Most of the Aleut people in the Aleutian Islands eastward to Greenland Inuit relied on the kayak for hunting
1444-450: A part of life in the Yupik and Inupiat whaling villages of Alaska. The boat must be hauled on a sled pulled by snowmobile over very rough trails cut through the ice ridges to locations where there are open leads in the ice pack , where it is used to catch whales. The skin cover on an umiak will last for two or three years, as does an aluminum boat used in the same way; however, replacing
1520-438: A perimeter webbing band specifically installed for this purpose. Modern designs have many features for safety and convenience such as map and paddle pockets, access openings, and tie-down straps. Like a kayak, a spray deck can help allow a canoeist to perform a roll (provided he/she is strapped to the canoe) and continue paddling without having to bail out. But this maneuver is much more difficult and requires advanced skills. On
1596-402: A right angle, in a position called the "L" kayaking position. Other kayaks offer a different sitting position, in which the paddler's legs are not stretched out in front of them, and the thigh brace bears more on the inside than the top of the thighs (see diagram). A kayaker must be able to move the hull of their kayak by moving their lower body, and brace themselves against the hull (mostly with
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#17328549268351672-642: A sail and departed from Las Palmas in the Canary Islands carrying 270 kg (590 lb) of tinned food and 210 L (55 U.S. gal) of water. Fifty-eight days and 5,060 km (2,730 nmi) later he reached Saint Thomas, U.S. Virgin Islands . Another German, Oskar Speck , paddled his foldboat down the Danube and four years later reached the Australian coast after having traveled roughly 14,000 miles across
1748-435: A series of small holes are drilled along the edges. Copper wire is then used to "stitch" the pieces together through the holes. After the pieces are temporarily stitched together, they are glued with epoxy and the seams reinforced with fiberglass. When the epoxy dries, the copper stitches are removed. Sometimes the entire boat is then covered in fiberglass for additional strength and waterproofing though this adds greatly to
1824-815: A sit-in kayak feel more secure in a kayak with a weight capacity substantially more than their own weight. Maximum volume in a sit-in kayak is helped by a wide hull with high sides. But paddling ease is helped by lower sides where the paddler sits and a narrower width. While the kayak's buoyancy must be more than the loaded kayak, the optimal amount of excess buoyancy varies somewhat with kayak type, purpose, and personal taste ( squirt boats , for instance, have very little positive buoyancy). Displacements vary with paddler weight. Most manufacturers include kayaks for paddlers weighing 65–85 kg (143–187 lb), with some kayaks for paddlers down to 50 kg (110 lb). Kayaks made for paddlers under 45 kg (100 lb) are almost all very beamy and intended for beginners. As
1900-482: A somewhat shorter paddle appropriate and a shorter paddle puts less strain on the shoulder joints. Some paddlers are comfortable with a sit-in kayak so narrow that their legs extend fairly straight out. Others want sufficient width to permit crossing their legs inside the kayak. Primary (sometimes called initial ) stability describes how much a boat tips, or rocks back and forth when displaced from level by paddler weight shifts. Secondary stability describes how stable
1976-415: A stitch & glue hull and a strip-built deck. Kayaks made from wood sheathed in fiberglass have proven successful, especially as the price of epoxy resin has decreased in recent years. Stitch & glue designs typically use modern, marine-grade plywood with a thickness of about 3 to 5 mm (0.12 to 0.20 in). After cutting out the required pieces of hull and deck (kits often have these pre-cut),
2052-550: A traditional sextant and compass , along with approximately 600 pounds of food and water, including a device to convert sea water to fresh water. Within six days of reaching Hawaii, both he and his yellow kayak were featured on The Tonight Show , hosted by Johnny Carson . Inflatable rubberized fabric boats were first introduced in Europe and rotomolded plastic kayaks first appeared in 1973. Most kayaks today are made from roto-molded polyethylene resins. The development of plastic and rubberized inflatable kayaks arguably initiated
2128-491: A variety of prey—primarily seals, though whales and caribou were important in some areas. Skin-on-frame kayaks are still being used for hunting by Inuit in Greenland, because the smooth and flexible skin glides silently through the waves. Contemporary traditional-style kayaks trace their origins primarily to the native boats of Alaska, northern Canada , and Southwest Greenland . The use of fabric kayaks on wooden frames called
2204-599: A wide, flat-bottomed kayak will have high primary stability and feel very stable on flat water. However, when a steep wave breaks on such a boat, it can be easily overturned because the flat bottom is no longer level. By contrast, a kayak with a narrower, more rounded hull with more hull flare can be edged or leaned into waves and (in the hands of a skilled kayaker) provides a safer, more comfortable response on stormy seas. Kayaks with only moderate primary, but excellent secondary stability are, in general, considered more seaworthy , especially in challenging conditions. The shape of
2280-431: Is a flexible waterproof cover for a boat (in particular for a kayak or a canoe ) with holes for the passengers' waists. Spraydecks are used to prevent water from entering the boat while allowing passengers to paddle or row . Spraydecks are used in breaking waves, on whitewater , in inclement weather, and in splashy sports. An alternative is the tuilik . A spraydeck is made of water-tight cloth or neoprene . It
2356-406: Is a traditional material for spraydecks. It requires labor-intensive preparation. A European description: In fair weather the kaiak-man uses the so-called half-jacket (akuilisak). This is made of water-tight skin with the hair removed, and is sewn with sinews. Round its lower margin runs a draw-string, or rather a draw-thong, by means of which the edge of the jacket can be made to fit so closely to
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2432-399: Is an integral part of the structure, and will also affect the trade-offs made. Attempting to lift and carry a kayak by oneself or improperly is a significant cause of kayaking injuries. Good lifting technique, sharing loads, and not using needlessly large and heavy kayaks prevent injuries. If the displacement of a kayak is not enough to support the passenger(s) and gear, it will sink. If
2508-454: Is longer above, has sleeves attached to it, and a hood that comes right over the head. It is laced tight around the face and wrists, so that with it on the kaiak-man can go right through the breakers and can capsize and right himself again, without getting wet and without letting a drop of water into the kaiak. — Fridtjof Nansen , "Eskimo Life", 1893, English translation by William Archer Sprayskirts (and tuiliks ) can also be made of gut from
2584-584: Is sized to fit over the opening, or cockpit, of the canoe or kayak, with holes for the waists of the passengers. The spraydeck generally seals around the rim of the cockpit and around the torso of each passenger. Each opening in a spraydeck must make a fairly watertight seal. The seal varies in quality. The deck can be made to seal in several ways, including elastic fabric, a hem containing an elastic cord and/or drawstring, and both. Spraydecks are worn by many kayakers in most conditions, but especially on rough water and in inclement weather, to prevent water entering
2660-563: The Middle Fork Salmon River in 1940. In 1941, Grant paddled a foldboat through Grand Canyon National Park . He outfitted his foldboat, named Escalante, with a sponson on each side of his boat and filled the boat with beach balls. As with nearly all American foldboat enthusiasts of the day, he did not know how to roll his boat. Fiberglass mixed with resin composites, invented in the 1930s and 1940s, were soon used to make kayaks and this type of watercraft saw increased use during
2736-756: The North America department of the State Museum of Ethnology in Munich , with the oldest dating from 1577. Subarctic people made many types of boats for different purposes. The Aleut baidarka was made in double or triple cockpit designs, for hunting and transporting passengers or goods. An umiak is a large open-sea canoe, ranging from 5.2 to 9.1 m (17 to 30 ft), made with seal skins and wood, originally paddled with single-bladed paddles and typically had more than one paddler. Subarctic builders designed and built their boats based on their own experience and that of
2812-416: The cockpit rim and body of the kayaker, and which can be released rapidly from the cockpit to permit easy exit (in particular in a wet exit after a capsizing ). Inuit kayak builders had specific measurements for their boats. The length was typically three times the span of his outstretched arms. The width at the cockpit was the width of the builder's hips plus two fists (sometimes less). The typical depth
2888-438: The sprint kayak designed to be fast and light, and others such as the whitewater kayak designed to be sturdy and maneuverable. Some modern paddlecrafts, which still claim the title "kayak", remove integral parts of the traditional design; for instance, by eliminating the cockpit and seating the paddler on top of a canoe-like open deck, commonly known as a sit-on-top kayak. Other designs include inflated air chambers surrounding
2964-765: The 1950s, including in the US. Kayak Slalom World Champion Walter Kirschbaum built a fiberglass kayak and paddled it through Grand Canyon in June 1960. He knew how to roll and only swam once, in Hance Rapid (see List of Colorado River rapids and features ). Like Grant's foldboat, Kirschbaum's fiberglass kayak had no seat and no thigh braces. In June 1987, Ed Gillet, using a stock off the shelf traditional design 20 foot long by 31 inch wide fiberglass tandem kayak paddled over 2,000 miles non-stop from Monterey , California to Hawaii , landing his vessel there on August 27, 1987, after 64 days of paddling. Gillet had navigated his kayak by using
3040-565: The Eastern Arctic, where the umiak was rarely used for hunting, it was used mainly as summer transport for women and children, while men travelled by kayak, and thus was known as a "woman's boat". Kayak A kayak is a small, narrow human-powered watercraft typically propelled by means of a long, double-bladed paddle . The word kayak originates from the Inuktitut word qajaq ( IPA: [qajɑq] ). In British English,
3116-610: The Pacific. These watercraft were brought to the United States and used competitively in 1940 at the first National Whitewater Championship held in America near Middledam, Maine, on the Rapid River (Maine) . One "winner," Royal Little, crossed the finish line clinging to his overturned foldboat. Upstream, the river was "strewn with many badly buffeted and some wrecked boats." Two women were in
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3192-406: The ability to be deflated for extended portage. Although slower than hardshell kayaks, many higher-end models often constructed of hypalon, as opposed to cheaper PVC designs, begin to approach the performance of traditional sea kayaks. Being inflatable they are virtually unsinkable and often more stable than hardshell designs. New drop-stitch technology means slab, rather than tube shapes are used in
3268-406: The arms, and are lashed to the overarm and to the wrist, thus preventing the arm from becoming wet. Watertight mittens of skin are drawn over the hands. This half-jacket is enough to keep out the smaller waves which wash over the kaiak. In a heavier sea, on the other hand, a whole-jacket ( tuilik ) is used. This is made in the same way as the half-jacket, and, like it, fits close to the kayak-ring, but
3344-410: The bearded seal, for suitable skins. The skins are packed into seal oil and allowed to ferment while they are stored until March. At that time the skins are scraped free of hair, sewn together with a waterproof stitch, and then stretched over the wooden frame and tied into place using the sinew from caribou . With a new skin on the frame, the umiak is placed out in the wind and cold, to dry. In May when
3420-536: The boats to hunt on inland lakes, rivers and coastal waters of the Arctic Ocean , North Atlantic , Bering Sea and North Pacific oceans. These first kayaks were constructed from stitched seal or other animal skins stretched over a wood or whalebone-skeleton frame. (Western Alaskan Natives used wood whereas the eastern Inuit used whalebone due to the treeless landscape) . Kayaks are believed to be at least 4,000 years old. The oldest kayaks remaining are exhibited in
3496-519: The bowhead whales migrate eastward past Point Barrow , umiak skin boats are hauled on sleds pulled by snowmobiles out onto the ice. Although it is sometimes called a "woman's boat", modern Inuit dictionaries such as Kangiryuarmiut Uqauhingita Numiktittitdjutingit by Ronald Lowe , the Inuinnaqtun English Dictionary , and Asuilaak Inuktitut Living Dictionary translate umiak as boat, traditional skin boat, or any type of boat. In
3572-403: The builder's personal use. Fiberglass hulls are stiffer than polyethylene hulls, but they are more prone to damage from impact, including cracking. Most modern kayaks have steep V sections at the bow and stern, and a shallow V amidships . Fiberglass kayaks may be "laid-up" in a mold by hand, in which case they are usually more expensive than polyethylene kayaks, which are rotationally molded in
3648-588: The competition, Amy Lang and Marjory Hurd. With her partner Ken Hutchinson, Hurd won the double canoe race. Lang won the doubles foldboat event with her partner, Alexander "Zee" Grant. In the late 1930s and early 1940s, Alexander "Zee" Grant was most likely America's best foldboat pilot. Grant kayaked the Gates of Lodore on the Green River (Colorado River tributary) in Dinosaur National Monument in 1939 and
3724-467: The craft; replacing the single hull with twin hulls; and replacing handheld paddles with other human-powered propulsion methods such as pedal -driven propeller and "flippers". Some kayaks are also fitted with external sources of propulsion, such as a battery -powered electric motor to drive a propeller or flippers, a sail (which essentially modifies it into a sailboat ), or even a completely independent gasoline outboard engine (which converts it into
3800-438: The cross section affects stability, maneuverability, and drag. Hull shapes are categorized by roundness, flatness, and by the presence and angle of chines . This cross-section may vary along the length of the boat. A chine typically increases secondary stability by effectively widening the beam of the boat when it heels (tips). A V-shaped hull tends to travel straight (track) well but makes turning harder. V-shaped hulls also have
3876-439: The designs with higher inflation pressures (up to 0.7 bar (10 psi)), leading to considerably faster, though often less stable kayaks which rival hardshell boats in performance. Solid wooden hulls don't necessarily require significant skill and handiwork, depending on how they are made. Three main types are popular, especially for the home builder: plywood stitch & glue (S&G), strip-built , and hybrids which have
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#17328549268353952-408: The development of freestyle kayaking as we see it today since these boats could be made smaller, stronger, and more resilient than fiberglass boats. Typically, kayak design is largely a matter of trade-offs: directional stability ("tracking") vs maneuverability; stability vs speed; and primary vs secondary stability. Multihull kayaks face a different set of trade-offs. The paddler's body shape and size
4028-490: The displacement is excessive, the kayak will float too high, catch the wind and waves uncomfortably, and handle poorly; it will probably also be bigger and heavier than it needs to be. Being excessively big will create more drag, and the kayak will move more slowly and take more effort. Rolling is easier in lower-displacement kayaks. On the other hand, a higher deck will keep the paddler(s) drier and make self-rescue and coming through surf easier. Many beginning paddlers who use
4104-552: The edge of the kaiak-ring that it can only be pressed and down down over it with some little trouble. This done, the half-jacket forms, as it were, a water-tight extension of the kaiak. The upper part of the jacket comes close up to the armpits of the kaiak-man, and is supported by braces or straps, which pass over the shoulders and can be lengthened or shortened by means of handy runners or buckles of bone, so simple and yet so ingenious that we, with all our metal buckles and so forth, cannot equal them. Loose sleeves of skin are drawn up over
4180-548: The exception of the use of metal bolts and screws. The open umiak is significantly larger than the enclosed kayak, which was built to carry one or two men while hunting. Normally 9 or 10 m (30 or 33 ft), the umiak could be anywhere from 6 to 10 m (20 to 33 ft) long and 1.5 to 2 m (5 to 7 ft) wide. Hans Egede , a Norwegian-Danish Lutheran missionary to Greenland in 1721, stated that he had seen umiaks 18 m (60 ft) long. Although an umiak could carry up to 15 passengers, its light weight and lack of
4256-416: The feet) on each stroke. Most kayaks therefore have footrests and a backrest. Some kayaks fit snugly on the hips; others rely more on thigh braces. Mass-produced kayaks generally have adjustable bracing points. Many paddlers also customize their kayaks by putting in shims of closed-cell foam (usually EVA ), or more elaborate structures, to make it fit more tightly. Paddling puts substantial force through
4332-473: The floats are set so that they are both in the water, they give primary stability, but produce more drag . If they are set so that they are both out of the water when the kayak is balanced, they give secondary stability. Some kayak hulls are categorized according to the shape from bow to stern Common shapes include: Traditional-style and some modern types of kayaks (e.g. sit-on-top) require that paddler be seated with their legs stretched in front of them, in
4408-491: The front part of the deck, to reduce damage during boat-to-boat rescue and emptying. Nylon spraydecks are easy to attach, easy to remove, offer adequate seal to keep water out, comfortable, sometimes breathable, sometimes waterproof and are used during warmer conditions. They will either have neoprene or nylon for the torso. Nylon spraydecks are less commonly used during rough conditions as they are not as tightly fitted so are more likely to accidentally become free. Permeable cloth
4484-401: The generations before them passed on through oral tradition. The word "kayak" means "man's boat" or "hunter's boat", and subarctic kayaks were a personal craft, each built by the man who used it and closely fitting his size for maximum maneuverability . For this reason, kayaks were often designed ergonomically using one's own body proportions as units of measure . The paddler wore a tuilik ,
4560-415: The greatest secondary stability. Conversely, flat-bottomed hulls are easy to turn, but harder to direct in a constant direction. A round-bottomed boat has minimal area in contact with the water, and thus minimizes drag; however, it may be so unstable that it will not remain upright when floating empty, and needs continual effort to keep it upright. In a skin-on-frame kayak, chine placement may be constrained by
4636-549: The gut becomes the outside of the garment. Neoprene spray decks are snug, elastic, and tight fitting on the kayak or canoe cockpit, and have very little or no leakage when well fitted. They sit tight across the cockpit rim with little sag, so water sheds quickly rather than pools on their surface. They typically remain in place during water impact better than other types, so are the usual choice for white water rivers, surf, and sea kayaking. They remain in place during paddler actions of rolling and bracing. They are warm to wear, due to
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#17328549268354712-401: The intestines of sea mammals or bears. The gut is turned inside-out to clean both sides, then inflated to dry. Inflated gut dries quickly. If it is dried in cold, dark, windy weather, it becomes opaque and white, and is known as "winter gut". "Summer gut" is yellowish and transparent, and stiffer. The gut is then slit open lengthwise and the strips are sewn into a garment. The smoother inside of
4788-571: The kayak is also considered to be a kind of canoe . There are countless different types of kayaks due to the craft being easily adaptable for different environments and purposes. The traditional kayak has an enclosed deck and one or more cockpits, each seating one occupant or kayaker , differentiating the craft from an open-deck canoe. The cockpit is sometimes covered by a spray deck that prevents unwanted entry of water from waves or splashes. Even within these confines, kayaks vary vastly in respect to materials, length, and width, with some kayaks such as
4864-518: The kayak's cockpit and to help the kayaker roll . On a kayak, the spraydeck is secured to a rim surrounding the cockpit with a line or elastic string called a rand. The line or string often runs inside the hem along the edge of the spraydeck. Alternatively elastic cord is attached directly to the edge of the spraydeck, and is tightened around the rim of the kayak's cockpit or stretched over it. The fastening may be pulled tight or held so by its elasticity, this prevents water infiltration while allowing
4940-400: The kayaker to quickly release it if the boat should capsize: a so-called wet exit . To aid easy release during a capsize, a grab loop is attached at the front of the spraydeck, which the kayaker can use to pull the spraydeck free. A properly sealed spraydeck will allow a kayaker to perform an eskimo roll and continue paddling without having to bail out. A kayaker's spraydeck is also known as
5016-448: The legs, alternately with each stroke. The knees should therefore not be hyperextended . Separately, if the kneecap is in contact with the boat, or the knee joint is in torsion , this will cause pain and may injure the knee. Insufficient foot space will cause painful cramping and inefficient paddling. The paddler should generally be in a comfortable position. Today almost all kayaks are commercial products intended for sale rather than for
5092-454: The lightest kayaks. Like the older skin-on-frame kayaks, they are often home-built to fit a specific paddler. Engineer Xyla Foxlin built a kayak out of transparent fibreglass as well as LEDs to create a floating vessel that lights up at night, which she calls the Rainbowt . A special type of skin-on-frame kayak is the folding kayak . It has a collapsible frame, of wood, aluminum or plastic, or
5168-594: The most readily available materials in the Arctic regions (other skins and baleen framing members were also used at need). A "poor man's kayak" might be frameless and stuffed with a snow "frame". Today, seal skin is usually replaced with canvas or nylon cloth covered with paint , polyurethane , or a hypalon rubber coating, on a wooden or aluminum frame. Modern skin-on-frame kayaks often possess greater impact resistance than their fiberglass counterparts, but are less durable against abrasion or sharp objects. They are often
5244-402: The need to avoid the bones of the pelvis. Sea kayaks , designed for open water and rough conditions, are generally narrower at 55–65 cm (22–25 in) and have more secondary stability than recreational kayaks, which are wider 65–75 cm (26–30 in), and have a flatter hull shape and more primary stability. The body of the paddler must also be taken into account. A paddler with
5320-655: The neoprene tube around waist and lower trunk. They come in many sizes, to suit the shape and size of the cockpit rim and the waist of the wearer. The rim of a neoprene spray deck is elasticated, typically with either shock cord, or a rubber/elastomer rand. Models designed for casual use to just prevent splashes from entering the craft will typically have light shock-cord, making them easy to fit. Models designed for severe use such as for descending waterfalls are heavily elasticated so they remain in place, but require significant arm strength to fit. Neoprene spray decks may be fitted with additional reinforcement of wear resistant fabric on
5396-399: The price of reduced speed, and compromise between tracking and maneuverability, ranging from 2.7–4.3 m (9–14 ft). Length alone does not fully predict a kayak's maneuverability: a second design element is rocker , i.e. its lengthwise curvature. A heavily rockered boat curves more, shortening its effective waterline. For example, an 5.5 m (18 ft) kayak with no rocker is in
5472-451: The shape and size of the boat determines performance and optimal uses. The hull and deck are built with thin strips of lightweight wood, often thuja (Western Red cedar) , pine or redwood . The strips are edge-glued together around a form, stapled or clamped in place, and allowed to dry. Structural strength comes from a layer of fiberglass cloth and epoxy resin, layered inside and outside the hull . Strip–built kayaks are sold commercially by
5548-484: The skin on an umiak is much easier than repairing an aluminum boat. Additionally, the bowhead whale is sensitive to the metallic noise from aluminum boats, and tend to move away under the ice, to avoid them. In Utqiaġvik, Alaska , the process for replacing the skin of an umiak begins when the ice moves away from the shores of the Arctic Ocean in July. At their first summer access to the ocean, whaling crews hunt for oogruk ,
5624-446: The water from end to end. In contrast, the bow and stern of a rockered boat are out of the water, shortening its lengthwise waterline to only 4.9 m (16 ft). Rocker is generally most evident at the ends, and in moderation improves handling. Similarly, although a rockered whitewater boat may only be about a meter shorter than a typical recreational kayak, its waterline is far shorter and its maneuverability far greater. When surfing,
5700-517: The weight and is unnecessary. Construction is fairly straightforward, but because plywood does not bend to form compound curves, design choices are limited. This is a good choice for the first-time kayak builder as the labor and skills required (especially for kit versions) is considerably less than for strip-built boats which can take three times as long to build. Strip-built designs are similar in shape to rigid fiberglass kayaks but are generally both lighter and tougher. Like their fiberglass counterparts
5776-499: Was his fist plus the outstretched thumb (hitch hiker). Thus typical dimensions were about 5.2 m (17 ft) long by 51–56 cm (20–22 in) wide by 18 cm (7 in) deep. Traditional kayaks encompass three types: Baidarkas , from the Bering Sea & Aleutian Islands , the oldest design, whose rounded shape and numerous chines give them an almost blimp -like appearance; West Greenland kayaks, with fewer chines and
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