Spray deck

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Traditional akuilisaq (left) and tuilik (right), ~1893 sketch. Tuilik nansen.jpg
Traditional akuilisaq (left) and tuilik (right), ~1893 sketch.
A kayaker with water washing harmlessly over his stern and the rear of his spraydeck. Army Freestyle Kayaking competition MOD 45160543.jpg
A kayaker with water washing harmlessly over his stern and the rear of his spraydeck.

A spraydeck (sprayskirt in N. America, akuilisaq or tuiitsoq in Greenland) 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.

Contents

Spraydecks are used in breaking waves, on whitewater, in inclement weather, and in splashy sports. An alternative is the tuilik.

Construction

A spraydeck is made of water-tight cloth or neoprene. It 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.

Boat types

Kayak spraydeck

Spraydeck on a kayak. Spritzdecke.jpg
Spraydeck on a kayak.
Kayaker coming up from a roll, water cascading off his spraydeck. Kajak, brnenska prehrada.JPG
Kayaker coming up from a roll, water cascading off his spraydeck.

Spraydecks are worn by kayakers in most conditions, but especially on rough water and in inclement weather, to prevent water entering 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. [1] 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 passengers 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 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.

Canoe spraydeck

River canoes equipped with spraydecks for rough water Canoes with spraydecks.jpg
River canoes equipped with spraydecks for rough water

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 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 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.

Materials

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

Eskimo Life half-jacket.png

Sealskin is a traditional material for spraydecks. It requires labor-intensive preparation. [2] 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 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 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 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

Gut

A (probably Yupik?) kayak with a translucent gut sprayskirt attached to the coaming. The ribs have broken (probably due to the skin shrinking). Kayak hatch, Aleut, collected c. 1850 - Etholen collection, Museum of Cultures (Helsinki) - DSC04912.JPG
A (probably Yupik?) kayak with a translucent gut sprayskirt attached to the coaming. The ribs have broken (probably due to the skin shrinking).

Sprayskirts (and tuiliks) can also be made of gut [3] from the intestines of sea mammals or bears. [4] 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. [4] The smoother inside of the gut becomes the outside of the garment. [5]

Neoprene

Steel 100x100.png

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 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 the front part of the deck, to reduce damage during boat-to-boat rescue and emptying.

Nylon

Black kayak nylon spray deck 100x100.png
Horizon 100x100.png

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 is polyurethane-coated or teflon-coated to waterproof it.

Other materials

Some spraydecks are made from both nylon and neoprene. Whitewater spraydecks often have additional features to ensure the best seal and greatest robustness. Latex may be coated on the underside of the deck to grip the cockpit better and/or a protective material (e.g. Kevlar) added to the surface of the deck to provide abrasion resistance.

See also

Related Research Articles

Kayak Light boat that is paddled

A kayak is a small, narrow watercraft which is typically propelled by means of a double-bladed paddle. The word kayak originates from the Greenlandic word qajaq.

Kayaking Use of a kayak on water

Kayaking is the use of a kayak for moving over water. It is distinguished from canoeing by the sitting position of the paddler and the number of blades on the paddle. A kayak is a low-to-the-water, canoe-like boat in which the paddler sits facing forward, legs in front, using a double-bladed paddle to pull front-to-back on one side and then the other in rotation. Most kayaks have closed decks, although sit-on-top and inflatable kayaks are growing in popularity as well.

Canoe Light boat that is paddled

A canoe is a lightweight narrow water vessel, typically pointed at both ends and open on top, propelled by one or more seated or kneeling paddlers facing the direction of travel and using a single-bladed paddle.

Whitewater Turbulent and aerated water

Whitewater forms in a rapid context, in particular, when a river's gradient changes enough to generate so much turbulence that air is trapped within the water. This forms an unstable current that froths, making the water appear opaque and white.

Wetsuit Garment for thermal insulation from water

A wetsuit is a garment worn to provide thermal protection while wet. It is usually made of foamed neoprene, and is worn by surfers, divers, windsurfers, canoeists, and others engaged in water sports and other activities in or on water. Its purpose is to provide thermal insulation and protection from abrasion, ultraviolet exposure, and stings from marine organisms. It also contributes extra buoyancy. The insulation properties of neoprene foam depend mainly on bubbles of gas enclosed within the material, which reduce its ability to conduct heat. The bubbles also give the wetsuit a low density, providing buoyancy in water.

Dry suit Watertight clothing that seals the wearer from cold and hazardous liquids

A dry suit or drysuit provides the wearer with environmental protection by way of thermal insulation and exclusion of water, and is worn by divers, boaters, water sports enthusiasts, and others who work or play in or near cold or contaminated water. A dry suit normally protects the whole body except the head, hands, and possibly the feet. In hazmat configurations, however, all of these are covered as well.

Sea kayak Light boat that is paddled

A sea kayak or touring kayak is a kayak developed for the sport of paddling on open waters of lakes, bays, and the ocean. Sea kayaks are seaworthy small boats with a covered deck and the ability to incorporate a spray deck. They trade off the manoeuvrability of whitewater kayaks for higher cruising speed, cargo capacity, ease of straight-line paddling, and comfort for long journeys.

Whitewater kayaking Type of water sport

Whitewater kayaking is an adventure sport where a river is navigated in a decked kayak. Whitewater kayaking includes several styles. River running; where the paddler follows a river and paddles rapids as they travel. Creeking usually involving smaller, steeper, and more technical waterways. Creek boats tend to be short but high volume to allow for manoeuvrability while maintaining buoyancy. Slalom requires paddlers to navigate through "gates". Slalom is the only whitewater event to be in the Olympics. Play boating involves staying on one feature of the river and is more artistic than the others. Squirt boating uses low-volume boats to perform special moves in whitewater features.

Wildwater canoeing

Wildwater canoeing is a competitive discipline of canoeing in which kayaks or canoes are used to negotiate a stretch of river speedily. It is also called "Whitewater racing" or "Downriver racing" to distinguish it from whitewater slalom racing and whitewater rodeo or Freestyle competition.

Canoe slalom Competitive sport

Canoe slalom is a competitive sport with the aim to navigate a decked canoe or kayak through a course of hanging downstream or upstream gates on river rapids in the fastest time possible. It is one of the two kayak and canoeing disciplines at the Summer Olympics, and is referred to by the International Olympic Committee (IOC) as Canoe/Kayak Slalom. The other Olympic canoeing discipline is canoe sprint. Wildwater canoeing is a non-Olympic paddlesport.

Sea sock

A sea sock is a piece of safety equipment used in sea kayaking. It is a large waterproof bag, fitting the lower body of a kayaker, that is placed inside the kayak and attached tightly all around the rim of the cockpit. The paddler sits inside the sea sock and fits the sprayskirt over the sea sock and cockpit coaming as usual.

Squirt boating

Squirt boating is a form of whitewater rafting or canoeing where the boat is designed to be as low in volume as possible while still allowing the paddler to float. Squirt boats are designed to use both surface and underwater currents to maneuver within the water. These maneuvers can be used to effect navigational control or to perform tricks.

The Lyme Bay kayaking disaster was an 1993 incident that led to the death of four teenagers on a sea kayaking trip in the Lyme Bay area on the south coast of England. The incident led to legislation to regulate adventure activities centres working with young people in the United Kingdom.

Buoyancy aid Flotation aid worn by kayakers, canoeists and dinghy sailors

Buoyancy aids are a specialist form of personal flotation device (PFD) used most commonly by kayakers, canoeists and dinghy sailors. They are designed as a flotation aid, rather than a life-saving device and have several key differences to other PFD's and lifejackets. Regardless of the specification of buoyancy aids, they do not provide the same high level of protection as lifejackets.

Tuilik Watertight jacket used when paddling a kayak

A tuilik is an Inuit watertight jacket, used when paddling a kayak. It is sealed at the face, at the wrists and around the cockpit coaming. In this way the paddler can capsize and come back upright without getting wet, and without getting any water into the kayak.

Survival suit Waterproof suit that protects the wearer from hypothermia from immersion in cold water

A survival suit, more accurately and currently referred to as an immersion suit, is a type of waterproof dry suit intended to protect the wearer from hypothermia if immersed in cold water or otherwise exposed after abandoning a vessel, especially in the open ocean. Immersion suits usually have integral footwear, and a hood, and either built-in gloves or watertight wrist seals. Suits manufactured by several manufacturers also include an inflatable pillow which is permanently attached high on the back, or an inflatable tube that is attached with zippers at two points on the chest, each side of the main zipper, and circles the back. When inflated, both of these devices provide enhanced stability to the wearer, which, if conscious, allows them to keep the head above water, and to keep wind and seas from striking the face. The inflation tube is routed from the inflatable pillow over the left shoulder of the user, and secured in a loop on the chest.

Creeking Canoeing and kayaking involving the descent of waterfalls and slides

Creeking is a branch of canoeing and kayaking that involves descending very steep low-volume whitewater. It is usually performed in specialized canoes and kayaks specifically designed to withstand the extreme whitewater environment in which the activity occurs. In addition, the canoes and kayaks give the paddler improved performance and maneuverability needed to avoid river obstacles.

Kayak roll Method for righting a capsized kayak

A kayak roll is the act of righting a capsized kayak by use of body motion and/or a paddle. Typically this is done by lifting the torso towards the surface, flicking the hips to right the kayak, and applying a small force by means of the paddle to assist the torso back over the boat.

Whitewater canoeing Paddling a canoe on a moving body of water

Whitewater canoeing is the sport of paddling a canoe on a moving body of water, typically a whitewater river. Whitewater canoeing can range from simple, carefree gently moving water, to demanding, dangerous whitewater. River rapids are graded like ski runs according to the difficulty, danger or severity of the rapid. Whitewater grades range from I or 1 to VI or 6. Grade/Class I can be described as slightly moving water with ripples. Grade/Class VI can be described as severe or almost unrunnable whitewater, such as Niagara Falls.

Outline of canoeing and kayaking Overview of and topical guide to canoeing and kayaking

The following outline is provided as an overview of canoeing and kayaking:

References

  1. edge of the spray skirt
  2. "Tuiliks: Versatile garments with variety", by Shawn Baker. "Masik", Fall 2003: Volume 1, Issue 3
  3. Yuungnaqpiallerput : Pissurcuutet Imarpigmi = Tools for Ocean Hunting
  4. 1 2 Reed, Fran (2008). "Embellishments of the Alaska Native gut parka". Textile Society of America Symposium Proceedings, Paper 127.
  5. Yuungnaqpiallerput : Imarpigmiutarnek Piliat = Things Made from Sea Mammals