Outrigger boats are various watercraft featuring one or more lateral support floats known as outriggers, which are fastened to one or both sides of the main hull. They can range from small dugoutcanoes to large plank-built vessels. Outrigger boats can also vary in their configuration, from the ancestral double-hull configuration (catamarans), to single-outrigger vessels prevalent in the Pacific Islands and Madagascar, to the double-outrigger vessels (trimarans) prevalent in Island Southeast Asia. They are traditionally fitted with Austronesian sails, like the crab claw sails and tanja sails, but in modern times are often fitted with petrol engines.
Unlike a single-hulled vessel, an outrigger or double-hull vessel generates stability as a result of the distance between its hulls rather than due to the shape of each individual hull. As such, the hulls of outrigger or double-hull boats are typically longer, narrower and more hydrodynamically efficient than those of single-hull vessels. Compared to other types of canoes, smaller outrigger canoes can be quite fast, yet are also capable of being paddled and sailed in rougher water. This paddling technique, however, differs greatly from kayaking or rowing. The paddle, or blade, used by the paddler is single sided, with either a straight or a double-bend shaft.
Map showing the migration and expansion of the Austronesians
Outrigger boats were originally developed by the Austronesian-speaking peoples of the islands of Southeast Asia for sea travel. It is believed that the use of outriggers may have been initially caused by the need for stability on small watercraft after the invention of crab claw sails some time around 1500 BCE.[1]
Succession of forms in the development of the Austronesian boat (Mahdi, 1999)
The simplest form of all ancestral Austronesian boats had five parts. The bottom part consists of single piece of hollowed-out log. At the sides were two planks, and two horseshoe-shaped wood pieces formed the prow and stern. These were "sewn" together with dowels and lashings. They had no central rudders but were instead steered using an oar on one side. The ancestral rig was the mastless triangular crab claw sail which had two booms that could be tilted to the wind. These were built in the double-canoe configuration or had a single outrigger on the windward side. In Island Southeast Asia, these developed into double outriggers on each side that provided greater stability. The triangular crab claw sails also later developed into square or rectangular tanja sails, which like crab claw sails, had booms spanning the upper and lower edges. Fixed masts also developed later in both Southeast Asia (usually as bipod or tripod masts) and Oceania.[2]
Early researchers like Heine-Geldern (1932) and Hornell (1943) once believed that catamarans evolved from outrigger boats, but modern authors specializing in Austronesian cultures like Doran (1981) and Mahdi (1988) now believe it to be the opposite.[3][4][5]
Two canoes bound together developed directly from minimal raft technologies of two logs tied together. Over time, the double-hulled canoe form developed into the asymmetric double canoe, where one hull is smaller than the other. Eventually the smaller hull became the prototype outrigger, giving way to the single outrigger canoe, which diverged into the reversible single outrigger canoe in Oceania. Finally, the single outrigger types developed into the double outrigger canoe (or trimarans).[3][4][5]
A bas relief of Borobudur ship, a double outrigger vessel depicted in 8th century Borobudur temple, Java, Indonesia.
This would also explain why older Austronesian populations in Island Southeast Asia tend to favor double outrigger boats, as it keeps the boats stable when tacking. But they still have small regions where catamarans and single-outrigger boats are still used. In contrast, more distant outlying descendant populations in Micronesia, Polynesia, Madagascar, and the Comoros retained the double-hull and the single outrigger boat types, for the technology of double outriggers never reached them (exceptions being western Melanesia). To deal with the problem of the instability of the boat when the outrigger faces leeward when tacking, they instead developed the shunting technique in sailing, in conjunction with reversible single-outriggers.[3][4][5][6][7]
17th-century depiction of a Spanish-built joangan, a very large double-outrigger warship
"That care and attention, which govern their boat-building, cause their ships to sail like birds, while ours are like lead in this regard."
—Francisco Combés, Historia de las islas de Mindanao, Iolo y sus adyacentes (1667)
Outrigger fishing canoes are also used among certain non-Austronesian groups, such as the Sinhalese in Sri Lanka, where they are known as oruwa,[10] as well as among some groups in the Andaman and Nicobar Islands.[11] They can also be found in East Africa (e.g., the ungalawa of Tanzania).
The acquisition of the catamaran and outrigger boat technology by the non-Austronesian peoples in Sri Lanka and southern India is the result of very early Austronesian contact with the region, including the Maldives and Laccadive Islands. This is estimated to have occurred around 1000 to 600 BCE and onwards. This may have possibly included limited colonization that have since been assimilated. This is still evident in Sri Lankan and South Indian languages. For example, Tamilpaṭavu, Telugupaḍava, and Kannadapaḍahu, all meaning "ship", are all derived from Proto-Hesperonesian*padaw, "sailboat", with Austronesian cognates like Javaneseperahu, Kadazanpadau, Maranaopadaw, Cebuanoparáw, Samoanfolau, Hawaiianhalau, and Māoriwharau.[3]
The technology has persisted into the modern age. Outrigger boats can be quite large fishing or transport vessels. In the Philippines, outrigger boats (called bangka or paraw) are often fitted with petrol engines. The links between seafaring and outrigger boats in the Philippines extend through to political life, in which the smallest political unit in the country is still called "barangay" after the historical balangay outrigger boats used in the original migrations of the first Austronesian peoples across the archipelago and beyond. The Polynesian Voyaging Society has two double-hull sailing catamarans, Hokulea and Hawaiiloa, and sails them between various islands in the Pacific using traditional Polynesian navigation methods without instruments. The Hikianalia and Alingano Maisu are other extant double-hulled voyaging canoes.
Terminology and linguistics
The German linguistOtto Dempwolff (1934-1938) originally reconstructed the Proto-Austronesian word for "boat" as *waŋkaŋ, and included the reflexes for both *baŋkaʔ and *waŋkaʔ as its descendants.[12] However modern linguists like Robert Blust generally reject this.[13][14] Mahdi (2016) instead reconstructs four words for "boat" in the Austronesian languages, all ultimately derived from the monosyllabic protoforms *Cu and *baŋ. They are:[15][16]
Instead of being cognates, the protoforms *baŋkaʔ and *waŋkaʔ are believed to be doublets. The protoforms *qabaŋ and *baŋkaʔ are composites with a common precursor, with the *qa- and -*ka positioned differently. Only *qaCu and *qabaŋ can be traced back to Proto-Austronesian, with the rest being later developments.[15]
The outrigger float is called the ama in many Polynesian languages (compare Hawaiian ama, Māori ama, and Samoan ama, all meaning 'outrigger float'), realisations of Proto-Malayo-Polynesian *saRman 'outrigger float'.[17][18] Similar terms also exist in other Malayo-Polynesian languages, such as Pohnpeiandahm, Yapesethaam, Ambonese Malaysemang, all meaning 'outrigger float', as well as Chamorrosakman meaning '[a] large canoe.'[18] The outrigger boom—spars connecting the ama to the main hull (or the two hulls in a double-hull canoe)—are called ʻiako in Hawaiian and kiato in Māori (with similar words in other Polynesian languages), ultimately from Proto-Oceanic *kiajo or its doublet *kayajo both meaning 'outrigger boom' (compare Loniukiec, Kiribatikiaro, and Tongankiato, as well as Seimatayas and Gedagedayad, all meaning 'outrigger boom').[19][20] In Philippine languages, the outrigger floats are called katig or kate, from Proto-Philippine *katiR.[21][22]
Double-outrigger boats are more prevalent in Southeast Asia, though single-outriggers and catamarans also exist. They have two outrigger floats connected to spars lashed across a single hull. They range in size from small vessels like the jukung, vinta, and the paraw; to medium-sized trading and fishing vessels like the balangay and basnigan; to very large warships like the karakoa and kora kora. In Philippine vessels, additional booms called batangan are usually added across the outrigger spars (tadik), in between the outrigger floats (katig) and the main hull (bangka).[22][23] In modern terminology, especially in leisure or sport boating, double-outrigger ships are usually termed trimaran or triple-hull ships.
An unusual type of double-outrigger boat design, preserved in scale models in the Pitt Rivers Museum, forms a triangle shape. The front ends of the outriggers are attached directly to the hull, while the rear ends are splayed out. These boats were small and used exclusively as passenger ferries in the Pasig River of the Philippines.[24]
Catamarans and single-outrigger canoes are the traditional configurations in Polynesia, Micronesia, and Madagascar. In the Pacific Islands, a single outrigger float is called an ama. It is connected to the main hull by spars called ʻiako (Hawaiian), ʻiato (Tahitian), or kiato (Māori). The ama, which is usually rigged on the left side, provides stability. The paddlers need to be careful to avoid leaning too far on the opposite side of the ama, as that may cause the canoe to capsize (huli or lumaʻi). Double-outrigger configurations, a later innovation from Southeast Asian Austronesians, never reached Oceania.
Single-outrigger dugout canoes also survived until recent times in some parts of the Philippines. Examples include a specimen in the University of Southampton from Manila Bay collected in the 1940s, as well as boats from Lake Bulusan and Lake Buhi of the Bicol Region of southern Luzon from as recently as 2015. The single outrigger is used to provide lateral stability, while still allowing fishermen to work with fishing nets. These boats were paddled and were not equipped with sails. They have largely disappeared in modern times, partly due to the scarcity of suitable timber and partly due to the relative cheapness of fiberglass boats.[24]
Outrigger canoe racing has become a popular canoeing sport, with numerous clubs located around the world. Outrigger Canoe Racing is the State sport of Hawaii and an interscholastic high school sport. In Hawaii, entire families participate in summer regattas with age groups from keiki (children as young as 6 with an adult steersperson) and age 12 through age 60+.
In modern sport outrigger canoeing, ships are classified according to the configuration and number of the hulls and the number of paddlers, including the OC1, OC2, OC3, OC4 and OC6 (with the respective number of paddlers using a single-hull outrigger canoe), and the DC12 or OC12 (with twelve paddlers using a double-hull outrigger canoe, two six-person canoes rigged together like a catamaran). Outriggers without a rudder are referred to as V1, V2, etc. (where V refers to vaʻa).
Six-person outrigger canoes (or OC6) are among the most commonly used for sport use; single-person outrigger canoes (or OC1) are also very common. Two and four-person outrigger canoes are also sometimes used, and two six-person outrigger canoes are sometimes rigged together like a catamaran to form a twelve-person double canoe.
Modern OC6 hulls and amas are commonly made from glass-reinforced plastic. However, some canoes are made of more traditional materials. In Ancient Hawaii, canoes were carved from the trunks of very old koa trees. These canoes, although rare, are still very much in use today. The ʻiako are usually made of wood; the ʻiako-ama and ʻiako-hull connections are typically done with rope wrapped and tied in an interlocking fashion to reduce the risk of the connection coming completely apart if the rope breaks.
Modern OC1 hulls and amas are commonly made from glass-reinforced plastic, carbon fiber reinforced plastic, and/or Kevlar to produce a strong but light canoe. OC1 are often made with rudders operated by foot pedals. More traditional designs do not have rudders. OC1 commonly use ʻiako made of aluminium or carbon fiber, with a mechanism for quickly assembling and disassembling the canoe (snap buttons, large wing nuts, etc.).
Roles
In an outrigger canoe, the paddlers sit in line, facing toward the bow of the canoe (i.e., forward, in the direction of travel, unlike rowing). The seats are numbered from 1 (closest to the bow) to the number of seats in the canoe, usually 6. The steerer (or steersman or steersperson) sits in the last seat of the canoe (seat 6 in the common OC6) and, as the name indicates, is primarily responsible for steering. The paddler sitting in seat 1 is called the stroke (or stroker) and is responsible for setting the pace of the paddle strokes. The stroker should have a high level of endurance to keep the rate (the number of strokes taken in a given amount of time) manageable for whatever the situation may be. The first two positions may also be involved in certain steering manoeuvers. This usually involves the draw stroke. During a tight turn, the one seat might poke to make the canoe turn the opposite way. In the middle of the canoe (seats number 3 and 4) known as the powerhouse are the strong and powerful paddlers. Any of the 2 can be the 'caller' who directs when to switch over their blades, when to pick up or slow down the stroking pace, etc. Whoever is caller must have very good leadership skills and know how to think off the top of their heads in any situation. Every position has an important role to play in the canoe.
In an OC1, the single paddler must also steer the canoe. Some OC1s have rudders operated by foot pedals, while OC1s without rudders must be steered by drawing and paddling as needed for steering purposes while paddling to move the canoe forward.
Steersman
Racing outrigger canoes. The canoe in the front right, with a narrower hull and smaller body, is a single-person outrigger canoe, or OC1. The other canoes are six-person outrigger canoes or OC6.
A good steersman is able to maintain the straight attitude of the canoe throughout the course of a race, and also keep the boat and the crew safe in rough sea conditions. They may also take advantage of water conditions to gain extra speed by surfing. The steersman uses a single bladed steering paddle which has a larger blade than a standard outrigger paddle, is built stronger, and has less or no bend in its shaft. They steer by the following methods:
Poking: holding the paddle vertically against the side of the canoe, causing drag on that side to cause the canoe to turn that direction. (left to go left and right to go right)
Drawing: paddling at a 45 to 90-degree angle to pull water under the canoe, causing the canoe to turn the opposite direction.
Posting: holding the paddle in the water out to the side with the forward edge angled opposite to the desired turn direction, usually as a prelude to drawing.
Paddling: by applying power on one side of the canoe, the steersman can influence to a small degree which way the canoe will turn. Paddling also increases the total power moving the canoe forward compared to the other steering methods. The steersman should try and paddle as much as possible so he or she doesn't slow down the canoe by contributing to the amount of weight in the canoe.
A steersman also skippers the canoe and instructs all other paddlers as necessary. As an outrigger canoe is a long narrow canoe with the steersman placed at the very end, the steersman must give instructions sufficiently loudly and clearly for the entire crew to hear. From a water safety perspective the steersman should also be among the most experienced crew members, and be knowledgeable with the waterways and weather conditions, relevant maritime rules and other safety considerations such as the use of personal flotation devices, rigging of the canoe, placement of paddlers in the various seating positions, and recovery from a huli by righting the canoe and bailing out the water. The steersman should also be able to keep the ama down during rough water.
Paddlers
1907 paddler from New Guinea
Paddlers use single-bladed paddles, usually with single or double bent shafts. The paddling stroke is similar to that of most other racing canoe paddling strokes, involving primarily core and lat strength. Generally, each paddler paddles on the opposite side from the paddler in directly front (for example, in an OC6, paddlers in seats 1, 3, and 5 paddle on one side, while paddlers in seats 2 and 4 paddle on the other side). All paddlers switch sides simultaneously on a call from one who is the designated caller. The steerer may paddle either side or switch sides as needed for steering purposes. The steersman will also switch sides to keep the ama from popping up and capsizing the canoe.
Stronger paddlers are typically placed in the middle of the canoe, while paddlers with the most endurance tend to be placed at the front, as the lead paddler sets the pace for the crew. All other paddlers synchronize their strokes to the paddler in front of them (whom they can directly see).
In rough water, it is often desirable to have a paddler with steering skill in seat 5 (of an OC6), to allow for the steerer to have that paddler also take steering strokes if needed in some situations. In conditions when the boat is surfing, the stern of the canoe will be so far out of the water that seat 5 will have to keep the boat on course. A seat 5 paddler with steering skill can also assist in preventing a huli by staying on the ama side during a particularly rough stretch of water.
In water rough enough to splash into the canoe, paddlers also need to pay attention to the water level in the canoe, report the situation to the steerer, and bail out the water as necessary. Paddlers also need to know how to recover from a huli under the steerer's direction.
In a quick turn situation, paddlers at the front may also be instructed to une (poke steer, causes the canoe to turn the opposite direction) or kahi (post and draw steer, pulls the canoe to the side where this is done) to help bring the canoe around a turn quickly.
The length of a race ranges from short sprints (e.g., 250–500 metres for the OC1 and the OC12, 500–2000 metres (usually includes turns) for the OC6) to longer events, including marathons (e.g., 42 kilometres). A number of races are raced over distances that far exceed 42 kilometres, including the Molokaʻi Hoe that crosses the Kaiwi Channel between the islands of Molokai and Oahu in Hawaii. However, long-distance races of 20 to 30 kilometres are more common, with shorter 5 to 8 kilometre courses typically being offered to novice paddlers and those under 20 years of age.
Longer races involving the OC6 often involve paddler replacements, which involve exit and entry to the canoe directly from the water while the canoe is underway (this is called a water change). Typically, nine paddlers form a crew, with six paddling the OC6 and the other three resting, drinking, and/or eating on an escort boat. Replacement typically occurs at 20 to 30 minute intervals; the escort boat drops the relief paddlers into the water ahead of the OC6, which is steered toward them. The relief paddlers climb in on the ama side as those they are replacing roll out into the water on the opposite side. The escort boat then picks up the paddlers in the water so that they can rest, drink, and/or eat before they, in turn, relieve some of the paddlers in the OC6.
The longer races are typically conducted in the open ocean, e.g., between islands in the South Pacific. The Molokaʻi Hoe in Hawaii, The Hamilton Cup in Australia,[26] The Vaka Eiva in Rarotonga (Cook Islands),[27] The Motu2Motu in Aitutaki (Cook Islands)[28] and the Catalina Channel crossing in California[29] are four examples of races involving water changes.
Paddlers and crews are usually classified by gender and age. Gender classification is typically straightforward, with male, female, and coed classifications, with the latter being a crew with equal numbers of male and female paddlers (different rules may apply to nine-person coed crews doing a race with paddler replacements). Age classifications typically include youth divisions like 19-and-under, 16-and-under, etc., master divisions with minimum ages typically starting at 35 or 40 years of age, and an open division which allows paddlers of any age. A novice division for paddlers with less than a specified number of years of race experience (usually one or two) may also exist in a given association.
In some races, a particular type of outrigger canoe, usually a more traditional design for the region, may be given its own racing classification. For example, races in Hawaii have a koa division, while southern California has a Bradley OC6 division and northern California OC1 sprint races have a traditional (no rudder) division.
Organisations
The International Va'a Federation (IVF) oversees va'a racing worldwide, including the IVF World Championships[30] and at the Pacific Games.[31]
Outrigger racing organizations in the United States include the East Coast Outrigger Racing Association (ECORA), the Hawaiian Canoe Racing Association (HCRA), the Northern California Outrigger Canoe Association (NCOCA), the Southern California Outrigger Canoe Association (SCORA), and several more.
A multihull is a boat or ship with more than one hull, whereas a vessel with a single hull is a monohull. The most common multihulls are catamarans, and trimarans. There are other types, with four or more hulls, but such examples are very rare and tend to be specialised for particular functions.
A catamaran is a watercraft with two parallel hulls of equal size. The distance between a catamaran's hulls imparts resistance to rolling and overturning. Catamarans typically have less hull volume, smaller displacement, and shallower draft (draught) than monohulls of comparable length. The two hulls combined also often have a smaller hydrodynamic resistance than comparable monohulls, requiring less propulsive power from either sails or motors. The catamaran's wider stance on the water can reduce both heeling and wave-induced motion, as compared with a monohull, and can give reduced wakes.
A trimaran is a multihull boat that comprises a main hull and two smaller outrigger hulls which are attached to the main hull with lateral beams. Most modern trimarans are sailing yachts designed for recreation or racing; others are ferries or warships. They originated from the traditional double-outrigger hulls of the Austronesian cultures of Maritime Southeast Asia; particularly in the Philippines and Eastern Indonesia, where it remains the dominant hull design of traditional fishing boats. Double-outriggers are derived from the older catamaran and single-outrigger boat designs.
An outrigger is a projecting structure on a boat, with specific meaning depending on types of vessel. Outriggers may also refer to legs on a wheeled vehicle that are folded out when it needs stabilization, for example on a crane that lifts heavy loads.
Proas are various types of multi-hull outrigger sailboats of the Austronesian peoples. The terms were used for native Austronesian ships in European records during the Colonial era indiscriminately, and thus can confusingly refer to the double-ended single-outrigger boats of Oceania, the double-outrigger boats of Island Southeast Asia, and sometimes ships with no outriggers or sails at all.
Waka are Māori watercraft, usually canoes ranging in size from small, unornamented canoes used for fishing and river travel to large, decorated war canoes up to 40 metres (130 ft) long.
A tepukei, tepuke or TePuke is a Polynesian boat type, characterized by its elaborate decking, its submerged hulls and symmetrical "crab claw" sail slender foil or radically extended tips claw sail. Tepukei boats are produced primarily by the Polynesian-speaking inhabitants of Taumako, and have been occasionally borrowed by other Polynesian and Melanesian societies.
Canoe sailing refers to the practice of fitting an Austronesian outrigger or Western canoe with sails.
The crab claw sail is a fore-and-aft triangular sail with spars along upper and lower edges. The crab claw sail was first developed by the Austronesian peoples by at least 2000 BCE. It is used in many traditional Austronesian cultures in Island Southeast Asia, Micronesia, Island Melanesia, Polynesia, and Madagascar. It is sometimes known as the Oceanic lateen or the Oceanic sprit, even though it is not restricted to Oceania, is neither a lateen sail nor a spritsail, and has an independent older origin.
Drua, also known as na drua, n'drua, ndrua or waqa tabu, is a double-hull sailing boat that originated in the south-western Pacific islands. Druas do not tack but rather shunt. Both ends of each hull are identical, but the hulls are of different sizes and the smaller one is always sailed to windward. The main differences, compared to proas, are that the hulls have a symmetric U-form profile, and a second hull is used instead of an outrigger. When a float (cama) is used in place of the smaller hull, the craft is called a camakau.
The Fijian double canoe was the largest and finest sea-going vessel ever designed and built by natives of Oceania before contact with Europeans.
Vaʻa is a word in Samoan, Hawaiian and Tahitian which means 'boat', 'canoe' or 'ship'. It is cognate with other Polynesian words such as vaka or the Māori word waka.
Camakau are a traditional watercraft of Fiji. Part of the broader Austronesian tradition, they are similar to catamarans, outrigger canoes, or smaller versions of the drua, but are larger than a takia. These vessels were built primarily for the purposes of travelling between islands and for trade. These canoes are single hulled, with an outrigger and a cama, a float, with both ends of the hull being symmetrical. They were very large, capable of travelling open ocean, and have been recorded as being up to 70 ft in length.
Wa are traditional sailing outrigger canoes of the Caroline Islands, which also includes Palau and Yap. They have a single outrigger. They are similar to the sakman of the Northern Marianas.
Amatasi are a type of Samoan double-hulled watercraft. Its sails were woven pandanus leaves tied to 2 spars. The hull was sometimes built of planks. Lashed together, large double canoes 30–60 feet long could carry 25 men on journeys of hundreds of miles.
The Moloka'i Hoe is an annual outrigger canoe race between the islands of Molokai and Oahu, Hawaii. The race is one of Hawaii's largest annual sporting events, drawing participants from Hawaii and the U.S. mainland as well as internationally. Participating countries include Australia, New Zealand, England, Germany, Japan, Hong Kong, and Tahiti.
Bangka are various native watercraft of the Philippines. It originally referred to small double-outrigger dugout canoes used in rivers and shallow coastal waters, but since the 18th century, it has expanded to include larger lashed-lug ships, with or without outriggers. Though the term used is the same throughout the Philippines, "bangka" can refer to a very diverse range of boats specific to different regions. Bangka was also spelled as banca, panca, or panga in Spanish. It is also known archaically as sakayan.
Polynesian multihull terminology, such as "ama", "aka" and "vaka" are multihull terms that have been widely adopted beyond the South Pacific where these terms originated. This Polynesian terminology is in common use in the Americas and the Pacific but is almost unknown in Europe, where the English terms "hull" and "outrigger" form normal parlance. Outriggers, catamarans, and outrigger boats are a common heritage of all Austronesian peoples and predate the Micronesian and Polynesian expansion into the Pacific. They are also the dominant forms of traditional ships in Island Southeast Asian and Malagasy Austronesian cultures, where local terms are used.
A paopao, is the name used by the Polynesian-speaking inhabitants of the Ellice Islands for their single-outrigger canoes, of which the largest could carry four to six adults. The large double-hulled sailing canoes had ceased to be constructed in the Ellice Islands some time before contact with Europeans.
Sakman, better known in western sources as flying proas, are traditional sailing outrigger boats of the Chamorro people of the Northern Marianas. They are characterized by a single outrigger and a crab claw sail. They are the largest native sailing ships (ladjak) of the Chamorro people. Followed by the slightly smaller lelek and the medium-sized duding. They are similar to other traditional sailing ships of Micronesia, like the wa, baurua, and the walap. These ships were once used for trade and transportation between islands.
Austronesian vessels are the traditional seafaring vessels of the Austronesian peoples of Taiwan, Maritime Southeast Asia, Micronesia, coastal New Guinea, Island Melanesia, Polynesia, and Madagascar. They also include indigenous ethnic minorities in Vietnam, Cambodia, Myanmar, Thailand, Hainan, the Comoros, and the Torres Strait Islands.
↑ Adrian, Horridge (2008). "Origins and Relationships of Pacific Canoes and Rigs". In Di Piazza, Anne; Pearthree, Erik (eds.). Canoes of the Grand Ocean(PDF). BAR International Series 1802. Archaeopress. ISBN9781407302898.
1 2 3 4 Mahdi, Waruno (1999). "The Dispersal of Austronesian boat forms in the Indian Ocean". In Blench, Roger; Spriggs, Matthew (eds.). Archaeology and Language III: Artefacts languages, and texts. One World Archaeology. Vol.34. Routledge. pp.144–179. ISBN0415100542.
1 2 3 Doran, Edwin B. (1981). Wangka: Austronesian Canoe Origins. Texas A&M University Press. ISBN9780890961070.
1 2 3 Doran, Edwin Jr. (1974). "Outrigger Ages". The Journal of the Polynesian Society. 83 (2): 130–140.
↑ Hornell, James (1932). "Was the Double-Outrigger Known in Polynesia and Micronesia? A Critical Study". The Journal of the Polynesian Society. 41 (2 (162)): 131–143.
↑ Kapitän, Gerhard (May 1989). "Records of Native Craft in Sri Lanka—I: The single outrigger fishing canoe oruwa—Part 2.2: Rowed, paddled and poled oru". International Journal of Nautical Archaeology. 18 (2): 137–149. doi:10.1111/j.1095-9270.1989.tb00185.x.
↑ Irenäus Eibl-Eibesfeldt, Land of a Thousand Atolls: A Study of Marine Life in the Maldive and Nicobar Islands, World Publishing Co., Cleveland and New York, 1964.
↑ Dempwolff, Otto (1934–1938). "Vergleichende Lautlehre des austronesischen Wortschatzes". Zeitschrift für Eingeborenen-Sprachen (Special Publication nos. 15, 17, 19).
Dierking, Gary (15 August 2007). Building Outrigger Sailing Canoes: Modern Construction Methods for Three Fast, Beautiful Boats (Paperback) (1sted.). Camden, Maine: International Marine/Ragged Mountain Press/McGraw Hill. p.192. ISBN0071487913.
Steve West (2012) Outrigger Canoeing – The Ancient Sport of Kings – A Paddlers Guide, Batini Books, Kanuculture. ISBN978-0-9586554-2-2
Steve West (2014) Outrigger Canoeing – The Art and Skill of Steering, Batini Books, Kanuculture. ISBN0-9586554-1-3
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