Canoe

For other uses, see Canoe (disambiguation).

A canoe is a relatively small boat, typically human-powered, but also commonly sailed. Canoes are pointed at both ends and usually open on top.

In its human-powered form, the canoe is propelled by the use of paddles, with the number of paddlers depending on the size of canoe. Paddlers face in the direction of travel, either seated on supports in the hull, or kneeling directly upon the hull. In this way paddling a canoe can be contrasted with Rowing, where the rowers face away from the direction of travel. Paddles may be single-bladed or double-bladed.

Sailing Canoes (see Canoe sailing) are propelled by means of a variety of sailing rigs. Common classes of modern sailing canoes include the 5sqm and the International 10sqm Sailing canoes. The latter is otherwise known as the International Canoe, and is one of the fastest and oldest competitively sailed boat classes in the western world.

Ambiguity over the word Canoe

Confusingly, the sport of canoeing, organised at the international level by the International Canoe Federation, uses the word canoe to cover both canoes as defined here, and kayaks (see below for a brief description of the differences between a kayak and a canoe). In fact, the sport of Canoe polo is exclusively played in kayaks. This confusing use of canoe to generically cover both canoes and kayaks is not so common in North American usage, but is common in Britain, Australia and presumably many parts of the world, both in sporting jargon and in colloquial speech. In these circumstances, the canoe as defined here is sometimes referred to as an open, Canadian, or Indian canoe, though these terms have their own ambiguities.

A 'canoe' in this ambiguous sense is a paddled vessel in which the user faces the direction of travel.

Design and construction

The parts of a canoe

  1. Bow
  2. Stern
  3. Hull
  4. Seat
  5. Thwart (a horizontal crossbeam near the top of the hull)
  6. Gunwale (pronounced gunnel; the top edge of the hull)
  7. Deck (a compartment containing a Foam block which prevents the canoe from sinking if capsized)

Some canoes, particularly those used for extended trips, are equiped with a yoke across the center of the boat. It is designed to allow one person to carry the canoe, and is sometimes molded to the shape of shoulders.

Canoe hulls are generally open on top. However, slalom canoes are closed in with a Spraydeck, like many kayaks.

Canoe materials

The earliest canoes were made from natural materials:
  • Early canoes were wooden, often simply hollowed-out tree trunks. This technology is still practiced in some parts of the world. Modern wooden canoes are typically Strip-built by Woodworking craftsmen. Such canoes can be very functional, lightweight, and strong, and are frequently quite beautiful works of art.
  • Many indigenous peoples of the Americas built canoes of tree bark and sap. The Amazonians commonly used Hymenaea trees. In temperate North America, Birch was the preferred tree, with TAR mixed into the sap.

Modern technology has expanded the range of materials available for canoe construction.

  • Wood-and-Canvas canoes are made by fastening an external canvas shell to a wooden hull. These use of canvas for this purpose was invented by Union scouts during the United States Civil War.
  • Aluminum canoes were first made by the Grumman company in 1944, when demand for airplanes for World War II began to drop off. Aluminum allowed a lighter and much stronger construction than contemporary wood technology. However, a capsized aluminium canoe will sink unless the ends are filled with flotation blocks.
  • Composites of Fiberglass, Kevlar and carbonfiber are used for modern canoe construction.
  • Royalex is another modern Composite material that makes an extremely flexible and durable hull. Royalex canoes have been known, after being wrapped around a rock, to be popped back into their original shapes with minimal creasing of the hull.
  • Polyethylene is a cheaper and heavier material used for modern canoe construction.

Depending on the intended use of a canoe, the various kinds have different advantages. For example, a canvas canoe is more fragile than an aluminum canoe, and thus less suitable for use in rough water; but it is quieter, and so better for observing wildlife. However, canoes made of natural materials require regular maintenance, and are lacking in durability.

Rounded and flat bottoms

A rounded-bottom canoe exhibits poor resistance to tilt. Its initial stability is poor, but its final stability is better. A flat-bottomed canoe has excellent initial stability, but if tilted beyond a threshold, becomes unstable and will capsize. Round-bottomed designs are also able to go over obstructions more easily, due to a small area of contact with the obstruction, though they do have a slightly greater draft. Many canoes are symmetrical about the centerline, but some advanced designs are asymmetrical.

Rounded-end canoes are able to turn easily. Angled-end canoes are somewhat resistant to turning, but have greater tracking ability. Tall ends serve little purpose other than catching the wind.

Keels

Keels on canoes will slightly increase the ability to 'track' in a straight line, but decrease the ability to turn quickly to avoid an obstacle. The hull, moving through the water, is much larger than the keel alone, and has considerably more effect on a canoes path through the water. "Shallow Vee"-bottom canoes have an integrated keel-like protrusion of the hull, which increases initial stability. Some sort of keel is beneficial when traveling on open water with crosswinds, but the associated increase in draft is undesirable for Whitewater.

In aluminum canoes, keels are manufacturing artifacts, where two halves of a hull are joined. In wood-and-canvas canoes, keels are rub-strips to protect the boat from rocks and as they are pulled up on shore. Plastic canoes feature keels for stiffening the hull and allowing internal tubular framing to be flush with the sole of the canoe. Hull shape, particularly the manner in which the hull flows to the bow and stern, along with paddling technique , determine how well (or not) a canoe will track.

Traditional designs around the world

Early canoes in many parts of the world were dugout canoes, formed of hollowed logs.

In the Pacific Islands, dugout canoes are fitted with outriggers for increased stability in the ocean. These canoes can be very large, and were once used for long-distance travel, such as the very large waka used by Māori who ventured to New Zealand many centuries ago. In Hawaii, canoes are traditionally manufactured from the trunk of the Koa tree. They typically carry a crew of six: one steersman and five paddlers.

In the temperate regions of eastern North America, canoes were traditionally made of a wooden frame covered with BARK of a Birch tree, pitched to make it waterproof. Later, they were made of a wooden frame, wood ribs, other wood parts (seats, gunwales, etc.) and covered with Canvas, sized and painted for smoothness and watertightness.

Use

Canoes have a reputation for instability, but this is not true if they are handled properly. For example, the occupants need to keep their Center of gravity as low as possible. Canoes can navigate swift-moving water with careful scouting of rapids and good communication between the paddlers.

When two people occupy a canoe, they paddle on opposite sides. For example, the person in the bow (the bowman) might hold the paddle on the port side, with the left hand just above the blade and the right hand at the top end of the paddle. The left hand acts mostly as a Pivot and the right arm supplies most of the power. Conversely, the sternman would paddle to Starboard, with the right hand just above the blade and the left hand at the top. For travel straight ahead, they draw the paddle from bow to stern, in a straight line parallel to the gunwale.

Steering

The paddling action of two paddlers will tend to turn the canoe toward the opposite side that on which the sternman is paddling. Thus, steering is particularly important, particularly because canoes have flat-bottomed hulls and are very responsive to turning actions. Steering techniques vary widely, even as to the basic question of which paddler should be responsible for steering.

Among experienced white water canoeists, the sternman is primarily responsible for steering the canoe, with the exception of two cases. The bowman will steer when avoiding rocks and other obstacles that the sternman cannot see. Also, in the case of backferrying, the bowman is responsible for steering the canoe using small correctional strokes while backpaddling with the sternman.

Among less-experienced canoeists, the canoe is typically steered from the bow. The advantage of steering in the bow is that the bowman can change sides more easily than the sternman. Steering in the bow is initially more intuitive than steering in the stern, because to steer to starboard, the stern must actually move to port. On the other hand, the paddler who does not steer usually produces the most forward power or Thrust, and the greater source of thrust should be placed in the bow for greater steering stability.

Paddle strokes

  • Advocates of steering in the stern often use the J-stroke, which is so named because, when done on the port side, it resembles the letter J. It begins like a standard stroke, but towards the end, the paddle is rotated and pushed away from the canoe with the power face of the paddle remaining the same throughout the stroke. This conveniently counteracts the natural tendency of the canoe to steer away from the side of the sternman's paddle. This stroke is used in reverse by the bowman while backpaddling or backferrying in white water.
  • A less elegant but more effective stroke which is used in the stern is the Superior stroke, more commonly referred to as the goon or rudder stroke. Unlike the J-stroke in which the side of the paddle pushing against the water during the stroke (the power face) is the side which is used to straighten the canoe, this stroke uses the opposite face of the paddle to make the steering motion. It is somewhat like a stroke with a small pry at the end of it. This stroke uses larger muscle groups, is preferable in rough water and is the one used in white water. It is commonly thought to be less efficient than the J-stroke when paddling long distances across relatively calm water.
  • Another stroke which may be used by either the bow or stern paddler is the pry stroke. The paddle is inserted vertically in the water, with the power face outward, and the shaft braced against the gunwale. A gentle prying motion is applied, forcing the canoe in the opposite direction of the paddling side.
  • The running pry can be applied while the canoe is moving. As in the standard pry, the paddle is turned sideways and braced against the gunwale, but rather than forcing the paddle away from the hull, the paddler simply turns it at an angle and allows the motion of the water to provide the force.
  • The draw stroke exerts a force opposite to that of the pry. The paddle is inserted vertically in the water at arm's length from the gunwale, with the power face toward the canoe, and is then pulled inward to the paddler's hip. A draw can be applied while moving to create a running or hanging draw.
  • The cross-draw stroke is a bowman's stroke that exerts the same vector of force as a pry, by moving the blade of the paddle to the other side of the canoe without moving the paddler's hands. The arm of bottom hand crosses in front of the bowman's body to insert the paddle in the water on the opposite side of the canoe some distance from the gunwale, facing towards the canoe, and is then pulled inward while the top hand pushes outward. The cross-draw is much stronger than the draw stroke.
  • The sweep is unique in that it steers the canoe away from the paddle regardless of which end of the canoe it is performed in. The paddle is inserted in the water some distance from the gunwale, facing forward, and is drawn backward in a wide sweeping motion. The paddler's bottom hand is choked up to extend the reach of the paddle. In the case of the bowman, the blade will pull a quarter-circle from the bow to the paddler's waist. If in the stern, the paddler pulls from the waist to the stern of the canoe. Backsweeps are the same stroke done in reverse.

Complementary strokes are selected by the bow and stern paddlers in order to safely and quickly steer the canoe. It is important that the paddlers remain in unison, particularly in white water, in order to keep the boat stable and to maximize efficiency. There are some differences in techniques in how the above strokes are utilized.

  • One of these techniques involves locking or nearly locking the elbow, that is on the side of the canoe the paddle is, to minimize muscular usage of that arm to increase endurance. Another benefit of this technique is that along with using less muscle you gain longer strokes which results in an increase of the power to stroke ratio. This is generally used more with the 'stay on one side' method of paddling.
  • The other technique is generally what newer canoeists use and that is where they bend the elbow to pull the paddle out of the water before they have finished the stroke. This is generally used more with the 'it is ok to switch sides' method of paddling.
  • The Stay on one side method is where each canoeist takes opposite sides and the sternman uses occasional J-strokes to correct direction of travel.
  • The It is ok to switch sides method allows the canoeists to switch sides frequently (usually every 5 to 10 strokes) to maintain their heading. This method is the fastest one on flat water and is used by all marathon canoers in the US and Canada. The method is best performed with bent-shaft paddles.

Setting poles

On swift rivers, the sternman may use a Setting pole. It allows the canoe to move through water too shallow for a paddle to create thrust, or against a current too quick for the paddlers to make headway. With skillful use of eddies, a setting pole can propel a canoe even against moderate (class III) rapids.

Sprint Canoes

Sprint canoes are purpose-built racing boats for use over short to intermetiate distance races (200m to 6km). They are unusual for their long length and incredible instability, a result of their narrow beam (a necessity for a streamlined form and therefore greater speed). A 1-person sprint canoe, termed a C-1, will be roughly seventeen feet long; a tripping canoe of a similar length would be suitable for 2 to 3 people with gear.

Sprint canoes are paddled while kneeling on one knee (a person paddling on the left would kneel on their left knee), and the paddler never switches sides; this leads to constant j-stroking in a C-1. Typical boat types are C-1, C-2, C-4 and C-15 (War Canoe). The War Canoe is found mostly in North America, while all other events enjoy some popularity internationally, with concentrations in North America and Europe.

Sprint canoeing is an Olympic event for men, but not for women, although women very ably race sprint canoes at many national championships.

Similar boats

  • The main difference between a Kayak and a canoe is that a kayak is a closed canoe meant to be used with a double-bladed paddle, one blade on each end, instead of a single bladed paddle. The double-bladed paddle makes it easier for a single person to handle a kayak. Kayaks are more commonly enclosed on top with a deck, making it possible to recover from a Capsize without the kayak filling with water, although there are also closed canoes, which are common in competition. The deck is an extension of the hull, with a special sheet called a Spraydeck sealing the gap between deck and the paddler.
  • A rowboat is not really like a canoe, since it is propelled by oars resting in pivots on the gunwales. A single rower works 2 oars, and sits with his or her back toward the direction of travel. Some rowboats, such as a River Dory or a raft outfitted with a rowing frame are suitable for Whitewater.
  • The Outrigger canoe consists of a hull and a secondary floating support.
  • The Adirondack guideboat is a rowboat that has similar lines to a canoe. However the rower sits closer to the bilge and uses a set of pinned oars to propel the boat.

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This page is based on the Wikipedia article ''Canoe''. It is licensed under the GNU free documentation license.

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