Lashed-lug boats are ancient boat-building techniques of the Austronesian peoples. It is characterized by the use of raised lugs (also called "cleats") on the inner face of hull planks. These lugs have holes drilled in them so that other hull components such as ribs, thwarts or other structural components can be tied to them with natural fiber ropes (hence "lashed"). This allows a structure to be put together without any metal fastenings. The planks are further stitched together edge-to-edge by sewing or using dowels ("treenails") unto a dugout keel and the solid carved wood pieces that form the caps for the prow and stern. Characteristically, the shell of the boat is created first, prior to being lashed unto ribs. The seams between planks are also sealed with absorbent tapa bark and fiber that expands when wet or caulked with resin-based preparations. [1] [2] : 297–302 [3] [4]
Lashed-lug construction has been used on a wide size range of vessels, from small craft, such as logboats that have had planks added to their sides to increase their freeboard, to large plank-built ships. [1] It is found in traditional boats of Maritime Southeast Asia, Melanesia, Madagascar, Micronesia, and Polynesia. It forms part of the maritime technology used by Austronesian peoples in their spread throughout the islands of the Indo-Pacific starting at 3000 to 1500 BCE. [5] [3] The oldest recovered remains of ships of lashed-lug construction is the Pontian boat of Malaysia dated to at around c.260–430 CE. [6] [1]
The lashed-lug technique of Austronesians is considered to be very similar to that found in archaeological remains of some northern-European boats. This is considered to be a case of independent invention of one of a limited number of solutions to the same boat-building problem. [1]
The lashed-lug technique remains remarkably homogeneous throughout the entirety of the Austronesian range. The keel and the base of the hull is a simple dugout canoe. Planks are then added gradually to the keel, either by sewing fiber ropes through drilled holes or through the use of internal dowels ("treenails") on the plank edges. [6] [3] Unlike carvel construction and in common with many early boat building methods, the shell of the boat is created first, prior to being fastened to the ribs. The seams between planks are also sealed with absorbent tapa bark and fiber that expands when wet or caulked with resin-based preparations. [3] [1] [4]
The most distinctive aspect of lashed-lug boats are the lugs (also called "cleats" by some authors). These are a series of carved protrusions with holes bored into them on the inside surfaces of the planks which are then lashed tightly together with the lugs on the adjacent planks and to ribs using plaited fiber (usually rattan, coir, and other palm fibers). [3] [6]
The seams of the planks were commonly caulked with resin-based pastes made from various plants as well as tapa bark and fibers which would expand when wet, further tightening joints and making the hull watertight. The ends of the boat are capped with single pieces of carved Y-shaped wooden blocks or posts which are attached to the planks in the same way. [3]
Once the shell of the boat is completed, the ribs are then built and lashed to the lugs to further strengthen the structure of the ship, while still retaining the inherent flexibility of the outer hull. The outriggers, when present, are attached with similar lashings to the main hull. [4]
The smallest Austronesian boat (excluding rafts and dugout canoes) characteristically have five parts all put together using the lashed-lug technique. These consist of the dugout keel, two planks that form the strakes, and the end caps for the prow and the stern. Larger ships usually differed in the number of planks used for the strakes, but the construction techniques remain the same. [3]
In older arrangements, the lashed lug construction is accompanied by the stitching together of the edges of the hull planks. This is done in a characteristic way which contrasts with the edge-stitching of planks in, for instance, traditional Indian Ocean craft. Lashed lug construction has a sequence of individually tied stitches which pass through L-shaped holes cut from the plank edge to the inner face of the plank. The result is that none of the stitch is exposed on the outside of the hull and so is protected from abrasion. The edge-to-edge fastening of the planks was supplemented by some dowels which joined the planks together –the dowels are thought to aid positioning during constructions and to resist shearing forces on the lashings while the boat is in use. [1] : 297 In archaeological remains that date from the beginning of the second millennium CE, the number of dowels used to join hull planking increased and stitching ceased to be used. [1] Consequently the terminology that was agreed upon for these construction techniques are "stitched-plank and lashed-lug" for the older method and "lashed-lug" alone for the later one. [1]
Lashed-lug techniques are different enough from the shipbuilding methods of South Asia, the Middle East, and China to identify remains of ships found in this region as being Austronesian. Despite this, some lashed-lug Austronesian shipwrecks have been misidentified as Indian or Chinese due to their cargo in the past. Non-Austronesian ships also later adopted lashed-lug techniques from contact with Austronesian traders, the most notable example being the Belitung shipwreck (c.830 CE). [6] [8] [9]
The oldest recovered lashed-lug ships include the Pontian boat of Pahang, Malaysia (c.260–430 CE) and the balangay boat burials of Butuan, Philippines (at least eleven ships ranging from c. 689 to 988 CE). [10] [11] [12] Archaeological evidence of lashed-lug ships from 1500 BCE to 1300 CE remains negligible due to the perishable nature of wooden vessels in the tropics. [6] [8] [13] The Butuan boat burials (which total to eleven) are the single largest concentration of lashed-lug boat remains of the Austronesian boatbuilding traditions. The Butuan boats were found in association with large amounts of trade goods from China, Cambodia, Thailand (Haripunjaya and Satingpra), Vietnam, and as far as Persia, indicating they traded as far as the Middle East. [14]
The oldest evidence of the lashed-lug techniques, however, are found on boat-shaped log coffins recovered from Kuala Selinsing in Perak, Malaysia, dated to around the 1st to 2nd centuries CE. [6] Such coffins and other watercraft symbolism are widespread among Austronesian groups throughout Southeast Asia, even among groups with no maritime access, underpinning the ancestral importance of the sea in Austronesian cultures. [15]
Though the sewn boat technique (but not the lashed lugs) is also used for boats in the western Indian Ocean traditions, it differs in that the stitching in Austronesian boats are discontinuous and only visible from the inside of the hull. This indicates that the sewn boat techniques of the Indian Ocean and Austronesia are not culturally-linked and developed independent of each other. The planks of ancient Austronesian ships were originally joined together using only the sewn boat technique. However, the development of metallurgy in Maritime Southeast Asia in the last two thousand years resulted in the replacement of the sewing technique with internal dowels, as well as increasing use of metal nails. [6] [3]
Early Scandinavian boats used lashings through cleats (lugs) on the hull planks to attach to the ribs of the boat. An example of this tradition is the Nydam boat, dated to 310-320 CE. This particular boat combined metal fastenings of planks, sewn planks and lashed cleats/lugs connecting to ribs. An earlier example (400-300 BCE), the Hjortspring boat is based on a dugout log which is expanded with sewn clinker planks with integral cleats/lugs lashed to framing. The Gokstad ship also used the lashing of ribs to cleats in the lower parts of the hull, and treenails elsewhere. [16] : 159, 167 Lashed lug also has a general similarity to the Bronze age Ferriby boats in England. [17] : 124
Shipbuilding is the construction of ships and other floating vessels. In modern times, it normally takes place in a specialized facility known as a shipyard. Shipbuilders, also called shipwrights, follow a specialized occupation that traces its roots to before recorded history.
Boat building is the design and construction of boats — and their on-board systems. This includes at minimum the construction of a hull, with any necessary propulsion, mechanical, navigation, safety and other service systems as the craft requires.
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 dugout canoes 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.
A sewn boat is a type of wooden boat which is clinker built with its planks sewn, stitched, tied, or bound together with tendons or flexible wood, such as roots and willow branches. Sewn boat construction techniques were used in many parts of the world prior to the development of metal fasteners, and continued to be used long after that time for small boats to reduce construction costs where metal fasteners were too expensive.
The Hjortspring boat is a vessel designed as a large canoe, from the Scandinavian Pre-Roman Iron Age. It was built circa 400–300 BC. The hull and remains were rediscovered and excavated in 1921–1922 from the bog of Hjortspring Mose on the island of Als in Sønderjylland, southern Denmark. The boat is the oldest find of a wooden plank ship in Scandinavia and it closely resembles the thousands of petroglyph images of Nordic Bronze Age ships found throughout Scandinavia. The vessel is a clinker-built wooden boat of more than 19 metres length overall, 13.6 metres long inside, and 2 metres wide. Ten thwarts that could have served as seats, span the boat with room for two persons each; this suggests space for a crew of at least 20 who propelled the boat with paddles. The boat would have weighed an estimated 530 kilograms, making it easily portable by its crew.
The Dover Bronze Age boat is one of fewer than 20 Bronze Age boats so far found in Britain. It dates to 1575–1520 BC, which may make it one of the oldest substantially intact boat in the world – though much older ships exist, such as the Khufu ship from 2500 BC. The boat was made using oak planks sewn together with yew lashings. This technique has a long tradition of use in British prehistory; the oldest known examples are the narrower Ferriby boats from east Yorkshire. A 9.5m long section of the boat is on display at Dover Museum.
Paraw are various double outrigger sail boats in the Philippines. It is a general term and thus can refer to a range of ship types, from small fishing canoes to large merchant lashed-lug plank boats with two outriggers (katig) propelled by sails
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Ancient boat building methods can be categorized as one of hide, log, sewn, lashed-plank, clinker, shell-first, and frame-first. While the frame-first technique dominates the modern ship construction industry, the ancients relied primarily on the other techniques to build their watercraft. In many cases, these techniques were very labor-intensive and/or inefficient in their use of raw materials. Regardless of differences in ship construction techniques, the vessels of the ancient world, particularly those that plied the waters of the Mediterranean Sea and the islands of Southeast Asia were seaworthy craft, capable of allowing people to engage in large-scale maritime trade.
The mtepe is a boat associated with the Swahili people. The mtepe's planks are held together by wooden pegs and coir, so it is a sewn boat designed to be flexible in contrast to the rigid vessels of western technique.
A balangay, or barangay, is a type of lashed-lug boat built by joining planks edge-to-edge using pins, dowels, and fiber lashings. They are found throughout the Philippines and were used largely as trading ships up until the colonial era. The oldest known balangay are the eleven Butuan boats, which have been carbon-dated individually from 689 to 988 CE and were recovered from several sites in Butuan, Agusan del Norte. The Butuan boats are the single largest concentration of lashed-lug boat remains of the Austronesian boatbuilding traditions. They are found in association with large amounts of trade goods from East Asia, Southeast Asia, and as far as Persia, indicating they traded as far as the Middle East.
Karakoa were large outrigger warships from the Philippines. They were used by native Filipinos, notably the Kapampangans and the Visayans, during seasonal sea raids. Karakoa were distinct from other traditional Philippine sailing vessels in that they were equipped with platforms for transporting warriors and for fighting at sea. During peacetime, they were also used as trading ships. Large karakoa, which could carry hundreds of rowers and warriors, were known as joangas by the Spanish.
The Maritime Silk Road or Maritime Silk Route is the maritime section of the historic Silk Road that connected Southeast Asia, East Asia, the Indian subcontinent, the Arabian Peninsula, eastern Africa, and Europe. It began by the 2nd century BCE and flourished until the 15th century CE. The Maritime Silk Road was primarily established and operated by Austronesian sailors in Southeast Asia who sailed large long-distance ocean-going sewn-plank and lashed‑lug trade ships. The route was also utilized by the dhows of the Persian and Arab traders in the Arabian Sea and beyond, and the Tamil merchants in South Asia. China also started building their own trade ships (chuán) and followed the routes in the later period, from the 10th to the 15th centuries CE.
Lepa, also known as lipa or lepa-lepa, are indigenous ships of the Sama-Bajau people in Indonesia, the Philippines, and Malaysia. They were traditionally used as houseboats by the seagoing Sama Dilaut. Since most Sama have abandoned exclusive sea-living, modern lepa are instead used as fishing boats and cargo vessels.
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Kalulis is a type of traditional boat from eastern Indonesia. It is mainly built in Kei islands, Southeast direction from Seram. It is mainly used for interinsular transport, but they are unsuitable for long haul voyages between Moluccas, Sulawesi, and Java. It is also known as perahu kalulis, ang kalulis, kalulus, and kulis.
Djenging is a type of large double-outrigger plank boat built by the Sama-Bajau people of the Philippines. It is typically used as a houseboat, though it can be converted to a sailing ship. It was the original type of houseboat used by the Sama-Bajau before it was largely replaced by the lepa after World War II. Larger versions of djenging were also known as balutu or kubu, often elaborately carved with bifurcated extensions on the prow and stern.
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Phoenician joints is a locked mortise and tenon wood joinery technique used in shipbuilding to fasten watercraft hulls. The locked mortise and tenon technique consists of cutting a mortise, or socket, into the edges of two planks and fastening them together with a rectangular wooden knob. The assembly is then locked in place by driving a dowel through one or more holes drilled through the mortise side wall and tenon.
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.