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Shipbuilding is the
construction Construction is a general term meaning the art and science to form Physical object, objects, systems, or organizations,"Construction" def. 1.a. 1.b. and 1.c. ''Oxford English Dictionary'' Second Edition on CD-ROM (v. 4.0) Oxford University Pr ...
of
ship A ship is a large watercraft that travels the world's oceans and other sufficiently deep waterways, carrying cargo or passengers, or in support of specialized missions, such as defense, research, and fishing. Ships are generally distinguished ...
s and other floating vessels. 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 Recorded history or written history describes the historical events that have been recorded in a written form or other documented communication which are subsequently evaluated by historians using the historical method. For broader world his ...
. Shipbuilding and ship repairs, both commercial and military, are referred to as "
naval engineering Naval architecture, or naval engineering, is an engineering discipline incorporating elements of mechanical, electrical, electronic, software and safety engineering as applied to the engineering design process, shipbuilding, maintenance, and o ...
". The construction of
boat A boat is a watercraft of a large range of types and sizes, but generally smaller than a ship, which is distinguished by its larger size, shape, cargo or passenger capacity, or its ability to carry boats. Small boats are typically found on inl ...
s is a similar activity called
boat building Boat building is the design and construction of boats and their systems. This includes at a minimum a hull, with propulsion, mechanical, navigation, safety and other systems as a craft requires. Construction materials and methods Wood Wo ...
. The dismantling of ships is called ship breaking.


History


Pre-history

The earliest known depictions (including paintings and models) of shallow-water
sailing boat A sailboat or sailing boat is a boat propelled partly or entirely by sails and is smaller than a sailing ship. Distinctions in what constitutes a sailing boat and ship vary by region and maritime culture. Types Although sailboat terminology ...
s is from the 6th to 5th millennium BC of the
Ubaid period The Ubaid period (c. 6500–3700 BC) is a prehistoric period of Mesopotamia. The name derives from Tell al-'Ubaid where the earliest large excavation of Ubaid period material was conducted initially in 1919 by Henry Hall and later by Leonard Wo ...
of
Mesopotamia Mesopotamia ''Mesopotamíā''; ar, بِلَاد ٱلرَّافِدَيْن or ; syc, ܐܪܡ ܢܗܪ̈ܝܢ, or , ) is a historical region of Western Asia situated within the Tigris–Euphrates river system, in the northern part of the ...
. They were made from bundled
reed Reed or Reeds may refer to: Science, technology, biology, and medicine * Reed bird (disambiguation) * Reed pen, writing implement in use since ancient times * Reed (plant), one of several tall, grass-like wetland plants of the order Poales * ...
s coated in bitumen and had bipod masts. They sailed in shallow coastal waters of the
Persian Gulf The Persian Gulf ( fa, خلیج فارس, translit=xalij-e fârs, lit=Gulf of Fars, ), sometimes called the ( ar, اَلْخَلِيْجُ ٱلْعَرَبِيُّ, Al-Khalīj al-ˁArabī), is a mediterranean sea in Western Asia. The bod ...
.


4th millennium BC


Ancient Egypt

Evidence from Ancient Egypt shows that the early Egyptians knew how to assemble planks of wood into a
ship hull A hull is the watertight body of a ship, boat, or flying boat. The hull may open at the top (such as a dinghy), or it may be fully or partially covered with a deck. Atop the deck may be a deckhouse and other superstructures, such as a funnel, d ...
as early as 3100 BC. Egyptian pottery as old as 4000 BC shows designs of early fluvial boats or other means for navigation. The Archaeological Institute of America reportsWard, Cheryl.
World's Oldest Planked Boats
, in ''
Archaeology Archaeology or archeology is the scientific study of human activity through the recovery and analysis of material culture. The archaeological record consists of artifacts, architecture, biofacts or ecofacts, sites, and cultural landsca ...
'' (Volume 54, Number 3, May/June 2009). Archaeological Institute of America.
that some of the oldest ships yet unearthed are known as the
Abydos boats The Abydos boats are the remnants of a group of ancient royal Egyptian ceremonial boats found at an archaeological site in Abydos, Egypt. Discovered in 1991, excavation of the Abydos boats began in 2000 at which time fourteen boats were identifie ...
. These are a group of 14 ships discovered in Abydos that were constructed of wooden planks which were "sewn" together. Discovered by Egyptologist David O'Connor of
New York University New York University (NYU) is a private research university in New York City. Chartered in 1831 by the New York State Legislature, NYU was founded by a group of New Yorkers led by then- Secretary of the Treasury Albert Gallatin. In 1832, th ...
,Schuster, Angela M.H.
This Old Boat
, 11 December 2000. Archaeological Institute of America.
woven straps were found to have been used to lash the planks together, and reeds or grass stuffed between the planks helped to seal the seams. Because the ships are all buried together and near a mortuary belonging to Pharaoh Khasekhemwy, originally they were all thought to have belonged to him, but one of the 14 ships dates to 3000 BC, and the associated pottery jars buried with the vessels also suggest earlier dating. The ship dating to 3000 BC was about 75 feet (23 m) long and is now thought to perhaps have belonged to an earlier pharaoh. According to professor O'Connor, the 5,000-year-old ship may have even belonged to Pharaoh Aha.


Austronesia

The first true ocean-going vessels were built by the
Austronesian peoples The Austronesian peoples, sometimes referred to as Austronesian-speaking peoples, are a large group of peoples in Taiwan, Maritime Southeast Asia, Micronesia, coastal New Guinea, Island Melanesia, Polynesia, and Madagascar that speak Austro ...
during the
Austronesian expansion The Austronesian peoples, sometimes referred to as Austronesian-speaking peoples, are a large group of peoples in Taiwan, Maritime Southeast Asia, Micronesia, coastal New Guinea, Island Melanesia, Polynesia, and Madagascar that speak Austron ...
(c. 3000 BC). From
Taiwan Taiwan, officially the Republic of China (ROC), is a country in East Asia, at the junction of the East and South China Seas in the northwestern Pacific Ocean, with the People's Republic of China (PRC) to the northwest, Japan to the nort ...
, they first settled the island of
Luzon Luzon (; ) is the largest and most populous island in the Philippines. Located in the northern portion of the Philippines archipelago, it is the economic and political center of the nation, being home to the country's capital city, Manila, as ...
in the
Philippines The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no), * bik, Republika kan Filipinas * ceb, Republika sa Pilipinas * cbk, República de Filipinas * hil, Republ ...
before migrating onwards to the rest of Island Southeast Asia and to
Micronesia Micronesia (, ) is a subregion of Oceania, consisting of about 2,000 small islands in the western Pacific Ocean. It has a close shared cultural history with three other island regions: the Philippines to the west, Polynesia to the east, and ...
by 1500 BC, covering distances of thousands of kilometers of open ocean. This was followed by later migrations even further onward; reaching
Madagascar Madagascar (; mg, Madagasikara, ), officially the Republic of Madagascar ( mg, Repoblikan'i Madagasikara, links=no, ; french: République de Madagascar), is an island country in the Indian Ocean, approximately off the coast of East Africa ...
in the
Indian Ocean The Indian Ocean is the third-largest of the world's five oceanic divisions, covering or ~19.8% of the water on Earth's surface. It is bounded by Asia to the north, Africa to the west and Australia to the east. To the south it is bounded by t ...
and
New Zealand New Zealand ( mi, Aotearoa ) is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and over 700 smaller islands. It is the sixth-largest island count ...
and
Easter Island Easter Island ( rap, Rapa Nui; es, Isla de Pascua) is an island and special territory of Chile in the southeastern Pacific Ocean, at the southeasternmost point of the Polynesian Triangle in Oceania. The island is most famous for its ne ...
in the
Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the contin ...
at its furthest extent, possibly even reaching the
Americas The Americas, which are sometimes collectively called America, are a landmass comprising the totality of North and South America. The Americas make up most of the land in Earth's Western Hemisphere and comprise the New World. Along with th ...
. Austronesians invented unique ship technologies like catamarans,
outrigger boat 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 ...
s,
lashed-lug Lashed-lug boats are ancient boat-building techniques of the Austronesian peoples. It is characterized by the use of sewn holes and later dowels ("treenails") to stitch planks edge-to-edge onto a dugout keel and solid carved wood pieces that form ...
boatbuilding techniques,
crab claw sail 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 some time around 1500 BC. It is used in many traditional Austronesian cultures in Islan ...
s, and
tanja sail Tanja sail ( Malay: ''layar tanjak'') or tanja rig is a type of sail commonly used by the Austronesian people, particularly in Maritime Southeast Asia. It is also known as the tilted square sail, canted rectangular sail, rectangular balance lug, ...
s; as well as oceanic navigation techniques. They also invented sewn-plank techniques independently. Austronesian ships varied from simple canoes to large multihull ships. The simplest form of all ancestral Austronesian boats had five parts. The bottom part consists of a single piece of hollowed-out log. At the sides were two planks, and two horseshoe-shaped wood pieces formed the
prow The bow () is the forward part of the hull of a ship or boat, the point that is usually most forward when the vessel is underway. The aft end of the boat is the stern. Prow may be used as a synonym for bow or it may mean the forward-most part ...
and stern. These were fitted tightly together edge-to-edge with dowels inserted into holes in between, and then lashed to each other with ropes (made from
rattan Rattan, also spelled ratan, is the name for roughly 600 species of Old World climbing palms belonging to subfamily Calamoideae. The greatest diversity of rattan palm species and genera are in the closed- canopy old-growth tropical fores ...
or fiber) wrapped around protruding lugs on the planks. This characteristic and ancient Austronesian boatbuilding practice is known as the "
lashed-lug Lashed-lug boats are ancient boat-building techniques of the Austronesian peoples. It is characterized by the use of sewn holes and later dowels ("treenails") to stitch planks edge-to-edge onto a dugout keel and solid carved wood pieces that form ...
" technique. They were commonly
caulk Caulk or, less frequently, caulking is a material used to seal joints or seams against leakage in various structures and piping. The oldest form of caulk consisted of fibrous materials driven into the wedge-shaped seams between boards on ...
ed with pastes made from various plants as well as
tapa bark Tapa cloth (or simply ''tapa'') is a barkcloth made in the islands of the Pacific Ocean, primarily in Tonga, Samoa and Fiji, but as far afield as Niue, Cook Islands, Futuna, Solomon Islands, Java, New Zealand, Vanuatu, Papua New Guinea and H ...
and fibres which would expand when wet, further tightening joints and making the hull watertight. They formed the shell of the boat, which was then reinforced by horizontal ribs. Shipwrecks of Austronesian ships can be identified from this construction as well as the absence of metal nails. Austronesian ships traditionally had no central rudders but were instead steered using an oar on one side. The ancestral Austronesian rig was the mastless triangular
crab claw sail 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 some time around 1500 BC. It is used in many traditional Austronesian cultures in Islan ...
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 sail Tanja sail ( Malay: ''layar tanjak'') or tanja rig is a type of sail commonly used by the Austronesian people, particularly in Maritime Southeast Asia. It is also known as the tilted square sail, canted rectangular sail, rectangular balance lug, ...
s, which like crab claw sails, had distinctive booms spanning the upper and lower edges. Fixed masts also developed later in both Southeast Asia (usually as bipod or tripod masts) and Oceania. Austronesians traditionally made their sails from woven mats of the resilient and salt-resistant pandanus leaves. These sails allowed Austronesians to embark on long-distance voyaging. The ancient Champa of
Vietnam Vietnam or Viet Nam ( vi, Việt Nam, ), officially the Socialist Republic of Vietnam,., group="n" is a country in Southeast Asia, at the eastern edge of mainland Southeast Asia, with an area of and population of 96 million, making i ...
also uniquely developed basket-hulled boats whose hulls were composed of woven and
resin In polymer chemistry and materials science, resin is a solid or highly viscous substance of plant or synthetic origin that is typically convertible into polymers. Resins are usually mixtures of organic compounds. This article focuses on n ...
-
caulk Caulk or, less frequently, caulking is a material used to seal joints or seams against leakage in various structures and piping. The oldest form of caulk consisted of fibrous materials driven into the wedge-shaped seams between boards on ...
ed bamboo, either entirely or in conjunction with plank
strake On a vessel's hull, a strake is a longitudinal course of planking or plating which runs from the boat's stempost (at the bows) to the sternpost or transom (at the rear). The garboard strakes are the two immediately adjacent to the keel on ea ...
s. They range from small
coracle A coracle is a small, rounded, lightweight boat of the sort traditionally used in Wales, and also in parts of the West Country and in Ireland, particularly the River Boyne, and in Scotland, particularly the River Spey. The word is also used of ...
s (the ''
o thúng O, or o, is the fifteenth letter and the fourth vowel letter in the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is ''o'' (pronounced ), plu ...
'') to large ocean-going trading ships like the ''
ghe mành Ghe or GHE may refer to: Language * Ge (Cyrillic), a letter of the Cyrillic script * Ghe with upturn, a letter of the Cyrillic script, called Ghe in Ukrainian * Southern Ghale language, spoken in Nepal Other uses * Garachiné Airport, in Panama * ...
''. The acquisition of the catamaran and outrigger technology by the non-Austronesian peoples in Sri Lanka and
southern India South India, also known as Dakshina Bharata or Peninsular India, consists of the peninsular southern part of India. It encompasses the Indian states of Andhra Pradesh, Karnataka, Kerala, Tamil Nadu, and Telangana, as well as the union territ ...
is due to the result of very early Austronesian contact with the region, including the
Maldives Maldives (, ; dv, ދިވެހިރާއްޖެ, translit=Dhivehi Raajje, ), officially the Republic of Maldives ( dv, ދިވެހިރާއްޖޭގެ ޖުމްހޫރިއްޔާ, translit=Dhivehi Raajjeyge Jumhooriyyaa, label=none, ), is an archipelag ...
and the
Laccadive Islands The Laccadive or Cannanore Islands are one of the three island subgroups in the Union Territory of Lakshadweep, India. It is the central subgroup of the Lakshadweep, separated from the Amindivi Islands subgroup roughly by the 11th parallel ...
via the Austronesian maritime trade network (the precursor to both the Spice Trade and the
Maritime Silk Road The Maritime Silk Road or Maritime Silk Route is the Maritime history, maritime section of the historic Silk Road that connected Southeast Asia, China, the Indian subcontinent, the Arabian peninsula, Somalia, Egypt and Europe. It began by the 2n ...
), 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,
Tamil Tamil may refer to: * Tamils, an ethnic group native to India and some other parts of Asia **Sri Lankan Tamils, Tamil people native to Sri Lanka also called ilankai tamils **Tamil Malaysians, Tamil people native to Malaysia * Tamil language, nativ ...
''paṭavu'',
Telugu Telugu may refer to: * Telugu language, a major Dravidian language of India *Telugu people, an ethno-linguistic group of India * Telugu script, used to write the Telugu language ** Telugu (Unicode block), a block of Telugu characters in Unicode S ...
''paḍava'', and
Kannada Kannada (; ಕನ್ನಡ, ), originally romanised Canarese, is a Dravidian language spoken predominantly by the people of Karnataka in southwestern India, with minorities in all neighbouring states. It has around 47 million native s ...
''paḍahu'', all meaning "ship", are all derived from
Proto-Hesperonesian The Western Malayo-Polynesian (WMP) languages, also known as the Hesperonesian languages, are a paraphyletic grouping of Austronesian languages that includes those Malayo-Polynesian languages that do not belong to the Central–Eastern Malayo- ...
*padaw, "sailboat", with Austronesian cognates like Javanese '' perahu'',
Kadazan The Kadazans are an ethnic group indigenous to the state of Sabah in Malaysia. They are found mainly in Penampang on the west coast of Sabah, the surrounding locales, and various locations in the interior. As a result of integration in cultur ...
''padau'',
Maranao The Maranao people (Maranao: mәranaw Filipino: ''Maranaw''), also spelled Meranao, Maranaw, and Mëranaw, is the term used by the Philippine government to refer to the southern indigenous people who are the "people of the lake", a predomi ...
''padaw'', Cebuano '' paráw'', Samoan ''folau'', Hawaiian ''halau'', and
Māori Māori or Maori can refer to: Relating to the Māori people * Māori people of New Zealand, or members of that group * Māori language, the language of the Māori people of New Zealand * Māori culture * Cook Islanders, the Māori people of the C ...
''wharau''.


3rd millennium BC


Ancient Egypt

Early Egyptians also knew how to assemble planks of wood with
treenail A treenail, also trenail, trennel, or trunnel, is a wooden peg, pin, or dowel used to fasten pieces of wood together, especially in timber frames, covered bridges, wooden shipbuilding and boat building. It is driven into a hole bored through two ...
s to fasten them together, using pitch for
caulking Caulk or, less frequently, caulking is a material used to seal joints or seams against leakage in various structures and piping. The oldest form of caulk consisted of fibrous materials driven into the wedge-shaped seams between boards on ...
the seams. The "
Khufu ship The Khufu ship is an intact full-size solar barque from ancient Egypt. It was sealed into a pit at the foot of the Great Pyramid of pharaoh Khufu around 2500 BC, during the Fourth Dynasty of the ancient Egyptian Old Kingdom. Like other buried ...
", a 43.6-meter vessel sealed into a pit in the Giza pyramid complex at the foot of the
Great Pyramid of Giza The Great Pyramid of Giza is the biggest Egyptian pyramid and the tomb of Fourth Dynasty pharaoh Khufu. Built in the early 26th century BC during a period of around 27 years, the pyramid is the oldest of the Seven Wonders of the Ancient Worl ...
in the
Fourth Dynasty The Fourth Dynasty of ancient Egypt (notated Dynasty IV) is characterized as a "golden age" of the Old Kingdom of Egypt. Dynasty IV lasted from to 2494 BC. It was a time of peace and prosperity as well as one during which trade with other ...
around 2500 BC, is a full-size surviving example which may have fulfilled the symbolic function of a
solar barque Solar barques were the vessels used by the sun god Ra in ancient Egyptian mythology. During the day, Ra was said to use a vessel called the Mandjet ( egy, mꜥnḏt) or the Boat of Millions of Years ( egy, wjꜣ-n-ḥḥw), and the vessel he ...
. Early Egyptians also knew how to fasten the planks of this ship together with mortise and tenon joints.


Indus Valley

The oldest known tidal dock in the world was built around 2500 BC during the
Harappan civilisation The Indus Valley Civilisation (IVC), also known as the Indus Civilisation was a Bronze Age civilisation in the northwestern regions of South Asia, lasting from 3300 BCE to 1300 BCE, and in its mature form 2600 BCE to 1900&n ...
at
Lothal Lothal () was one of the southernmost sites of the ancient Indus Valley civilisation, located in the Bhāl region of the modern state of Gujarāt. Construction of the city is believed to have begun around 2200 BCE. Archaeological Survey of ...
near the present day Mangrol harbour on the
Gujarat Gujarat (, ) is a state along the western coast of India. Its coastline of about is the longest in the country, most of which lies on the Kathiawar peninsula. Gujarat is the fifth-largest Indian state by area, covering some ; and the ninth ...
coast in
India India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the so ...
. Other ports were probably at
Balakot Balakot (; ur, ; ) is a town in Mansehra District in the Khyber Pakhtunkhwa province of Pakistan. The town was destroyed during the 2005 Kashmir earthquake, but was later rebuilt with the assistance of the Government of Pakistan and Saudi P ...
and
Dwarka Dwarka () is a city and a municipality of Devbhumi Dwarka district in the state of Gujarat in Western India. It is located on the western shore of the Okhamandal Peninsula on the right bank of the Gomti river at the mouth of the Gulf of Kut ...
. However, it is probable that many small-scale ports, and not massive ports, were used for the Harappan maritime trade. Ships from the harbour at these ancient port cities established trade with
Mesopotamia Mesopotamia ''Mesopotamíā''; ar, بِلَاد ٱلرَّافِدَيْن or ; syc, ܐܪܡ ܢܗܪ̈ܝܢ, or , ) is a historical region of Western Asia situated within the Tigris–Euphrates river system, in the northern part of the ...
. Shipbuilding and boatmaking may have been prosperous industries in ancient India. Native labourers may have manufactured the flotilla of boats used by
Alexander the Great Alexander III of Macedon ( grc, Ἀλέξανδρος, Alexandros; 20/21 July 356 BC – 10/11 June 323 BC), commonly known as Alexander the Great, was a king of the ancient Greek kingdom of Macedon. He succeeded his father Philip II to ...
to navigate across the
Hydaspes The Jhelum River (/dʒʰeːləm/) is a river in the northern Indian subcontinent. It originates at Verinag and flows through the Indian administered territory of Jammu and Kashmir, to the Pakistani-administered territory of Kashmir, and then ...
and even the Indus, under
Nearchos Nearchus or Nearchos ( el, Νέαρχος; – 300 BC) was one of the Greeks, Greek officers, a navarch, in the army of Alexander the Great. He is known for his celebrated expeditionary voyage starting from the Indus river, Indus River, through t ...
.Tripathi, page 145 The Indians also exported
teak Teak (''Tectona grandis'') is a tropical hardwood tree species in the family Lamiaceae. It is a large, deciduous tree that occurs in mixed hardwood forests. ''Tectona grandis'' has small, fragrant white flowers arranged in dense clusters ( pan ...
for shipbuilding to ancient
Persia Iran, officially the Islamic Republic of Iran, and also called Persia, is a country located in Western Asia. It is bordered by Iraq and Turkey to the west, by Azerbaijan and Armenia to the northwest, by the Caspian Sea and Turkmeni ...
. Other references to Indian timber used for shipbuilding is noted in the works of
Ibn Jubayr Ibn Jubayr (1 September 1145 – 29 November 1217; ar, ابن جبير), also written Ibn Jubair, Ibn Jobair, and Ibn Djubayr, was an Arab geographer, traveller and poet from al-Andalus. His travel chronicle describes the pilgrimage he made to M ...
.Hourani & Carswel, page 90


2nd millennium BC


Austronesia

The
crab claw sail 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 some time around 1500 BC. It is used in many traditional Austronesian cultures in Islan ...
was developed by Austronesians within Island Southeast Asia at around 1500 BC, from the more primitive V-shaped
square sail Square rig is a generic type of sail and rigging arrangement in which the primary driving sails are carried on horizontal spars which are perpendicular, or square, to the keel of the vessel and to the masts. These spars are called ''yards'' an ...
s. This is believed to have spurred the invention of the characteristic
outriggers 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 ...
of Austronesian vessels, as well as later derivative Austronesian fore-and-aft rigs like the
tanja sail Tanja sail ( Malay: ''layar tanjak'') or tanja rig is a type of sail commonly used by the Austronesian people, particularly in Maritime Southeast Asia. It is also known as the tilted square sail, canted rectangular sail, rectangular balance lug, ...
and the junk sail.


Mediterranean

The ships of Ancient Egypt's Eighteenth Dynasty were typically about 25 meters (80 ft) in length and had a single mast, sometimes consisting of two poles lashed together at the top making an "A" shape. They mounted a single square sail on a
yard The yard (symbol: yd) is an English unit of length in both the British imperial and US customary systems of measurement equalling 3  feet or 36 inches. Since 1959 it has been by international agreement standardized as exactly ...
, with an additional
spar SPAR, originally DESPAR, styled as DE SPAR, is a Dutch multinational that provides branding, supplies and support services for independently owned and operated food retail stores. It was founded in the Netherlands in 1932, by Adriaan van Well, ...
along the bottom of the sail. These ships could also be
oar An oar is an implement used for water-borne propulsion. Oars have a flat blade at one end. Rowers grasp the oar at the other end. The difference between oars and paddles is that oars are used exclusively for rowing. In rowing the oar is connecte ...
propelled. The ocean- and sea-going ships of Ancient Egypt were constructed with cedar wood, most likely hailing from Lebanon. The ships of
Phoenicia Phoenicia () was an ancient thalassocratic civilization originating in the Levant region of the eastern Mediterranean, primarily located in modern Lebanon. The territory of the Phoenician city-states extended and shrank throughout their histor ...
seem to have been of a similar design.


1st millennium BC


Austronesia

Austronesians established the Austronesian maritime trade network (the first true maritime trade network) at around 1000 to 600 BC, linking Southeast Asia with East Asia, South Asia, the Middle East, and later East Africa. The route later became part of the Spice trade network and the
Maritime Silk Road The Maritime Silk Road or Maritime Silk Route is the Maritime history, maritime section of the historic Silk Road that connected Southeast Asia, China, the Indian subcontinent, the Arabian peninsula, Somalia, Egypt and Europe. It began by the 2n ...
. The Austronesian traders introduced Austronesian shipbuilding techniques along the route, leading to the development of South Asian
outrigger boat 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 ...
s, the later adoption of the Chinese of the junk sail, and possibly the development of the fore-and-aft Arabic
lateen sail A lateen (from French ''latine'', meaning "Latin") or latin-rig is a triangular sail set on a long yard mounted at an angle on the mast, and running in a fore-and-aft direction. The settee can be considered to be an associated type of the same ...
.


China

The
naval history of China The naval history of China dates back thousands of years, with archives existing since the late Spring and Autumn period regarding the Chinese navy and the various ship types employed in wars.Needham, Volume 4, Part 3, 678. The Ming dynasty of Chi ...
stems back to the Spring and Autumn period (722 BC–481 BC) of the ancient
Chinese Chinese can refer to: * Something related to China * Chinese people, people of Chinese nationality, citizenship, and/or ethnicity **''Zhonghua minzu'', the supra-ethnic concept of the Chinese nation ** List of ethnic groups in China, people of ...
Zhou Dynasty The Zhou dynasty ( ; Old Chinese ( B&S): *''tiw'') was a royal dynasty of China that followed the Shang dynasty. Having lasted 789 years, the Zhou dynasty was the longest dynastic regime in Chinese history. The military control of China by ...
. The Chinese built large rectangular barges known as "castle ships", which were essentially floating fortresses complete with multiple decks with guarded
rampart Rampart may refer to: * Rampart (fortification), a defensive wall or bank around a castle, fort or settlement Rampart may also refer to: * "O'er the Ramparts We Watched" is a key line from "The Star-Spangled Banner", the national anthem of the ...
s. However, the Chinese vessels during this era were essentially fluvial (riverine). True ocean-going Chinese fleets did not appear until the 10th century
Song dynasty The Song dynasty (; ; 960–1279) was an imperial dynasty of China that began in 960 and lasted until 1279. The dynasty was founded by Emperor Taizu of Song following his usurpation of the throne of the Later Zhou. The Song conquered the rest ...
.


Mediterranean

There is considerable knowledge regarding shipbuilding and seafaring in the ancient Mediterranean.


1st millennium AD


Austronesia

Large multi-masted seafaring ships of Southeast Asian Austronesians first started appearing in Chinese records during the
Han Dynasty The Han dynasty (, ; ) was an imperial dynasty of China (202 BC – 9 AD, 25–220 AD), established by Liu Bang (Emperor Gao) and ruled by the House of Liu. The dynasty was preceded by the short-lived Qin dynasty (221–207 BC) and a warr ...
as the ''
k'un-lun po K'un-lun po (also called Kun-lun po, Kunlun po, or K'un-lun bo) were ancient sailing ships used by Austronesian sailors from Maritime Southeast Asia, described by Chinese records from the Han Dynasty. In the first millennium AD, these ships co ...
'' or ''kunlun bo'' ("ship of the '' k'un-lun'' ark-skinned southern people). These ships used two types of sail of their invention, the junk sail and
tanja sail Tanja sail ( Malay: ''layar tanjak'') or tanja rig is a type of sail commonly used by the Austronesian people, particularly in Maritime Southeast Asia. It is also known as the tilted square sail, canted rectangular sail, rectangular balance lug, ...
. Large ships are about 50–60 metres (164–197 ft) long, had tall
freeboard In sailing and boating, a vessel's freeboard is the distance from the waterline to the upper deck level, measured at the lowest point of sheer where water can enter the boat or ship. In commercial vessels, the latter criterion measured relativ ...
, each carrying provisions enough for a year, and could carry 200–1000 people. The Chinese recorded that these Southeast Asian ships were hired for passage to South Asia by Chinese Buddhist pilgrims and travelers, because they did not build seaworthy ships of their own until around the 8–9th century AD. Austronesians (especially from western Island Southeast Asia) were trading in the
Indian Ocean The Indian Ocean is the third-largest of the world's five oceanic divisions, covering or ~19.8% of the water on Earth's surface. It is bounded by Asia to the north, Africa to the west and Australia to the east. To the south it is bounded by t ...
as far as
Africa Africa is the world's second-largest and second-most populous continent, after Asia in both cases. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 6% of Earth's total surface area ...
during this period. By around 50 to 500 AD, a group of Austronesians, believed to be from the southeastern coasts of
Borneo Borneo (; id, Kalimantan) is the third-largest island in the world and the largest in Asia. At the geographic centre of Maritime Southeast Asia, in relation to major Indonesian islands, it is located north of Java, west of Sulawesi, and ea ...
(possibly a mixed group related to the modern Ma'anyan, Banjar, and/or the
Dayak people The Dayak (; older spelling: Dajak) or Dyak or Dayuh are one of the native groups of Borneo. It is a loose term for over 200 riverine and hill-dwelling ethnic groups, located principally in the central and southern interior of Borneo, each w ...
) crossed the Indian Ocean and colonized
Madagascar Madagascar (; mg, Madagasikara, ), officially the Republic of Madagascar ( mg, Repoblikan'i Madagasikara, links=no, ; french: République de Madagascar), is an island country in the Indian Ocean, approximately off the coast of East Africa ...
. This resulted in the introduction of outrigger canoe technology to non-Austronesian cultures in the East African coast.


China

The ancient
Chinese Chinese can refer to: * Something related to China * Chinese people, people of Chinese nationality, citizenship, and/or ethnicity **''Zhonghua minzu'', the supra-ethnic concept of the Chinese nation ** List of ethnic groups in China, people of ...
also built fluvial
ramming In warfare, ramming is a technique used in air, sea, and land combat. The term originated from battering ram, a siege weapon used to bring down fortifications by hitting it with the force of the ram's momentum, and ultimately from male sheep. Thus, ...
vessels as in the Greco-Roman tradition of the
trireme A trireme( ; derived from Latin: ''trirēmis'' "with three banks of oars"; cf. Greek ''triērēs'', literally "three-rower") was an ancient vessel and a type of galley that was used by the ancient maritime civilizations of the Mediterranean S ...
, although oar-steered ships in China lost favor very early on since it was in the 1st century China that the stern-mounted
rudder A rudder is a primary control surface used to steer a ship, boat, submarine, hovercraft, aircraft, or other vehicle that moves through a fluid medium (generally air or water). On an aircraft the rudder is used primarily to counter adve ...
was first developed. This was dually met with the introduction of the
Han Dynasty The Han dynasty (, ; ) was an imperial dynasty of China (202 BC – 9 AD, 25–220 AD), established by Liu Bang (Emperor Gao) and ruled by the House of Liu. The dynasty was preceded by the short-lived Qin dynasty (221–207 BC) and a warr ...
junk ship design in the same century. The Chinese were using square sails during the Han dynasty and adopted the Austronesian junk sail later in the 12th century. Iconographic remains show that Chinese ships before the 12th century used square sails, and the junk rig of Chinese ships is believed to be developed from tilted sails.Needham, Joseph (1971). ''Science and Civilisation in China: Volume 4, Physics and Physical Technology, Part III: Civil Engineering and Nautics''. Cambridge: Cambridge University Press. Southern Chinese junks were based on keeled and multi-planked Austronesian ship known as ''po'' by the Chinese, from the Old Javanese ''parahu'',' Javanese ''prau'', or Malay ''perahu'' — large ship.Manguin, Pierre-Yves. 2012. "Asian ship-building traditions in the Indian Ocean at the dawn of European expansion", in: Om Prakash and D. P. Chattopadhyaya (eds), ''History of science, philosophy, and culture in Indian Civilization'', Volume III, part 7: The trading world of the Indian Ocean, 1500-1800, pp. 597-629. Delhi, Chennai, Chandigarh: Pearson. Southern Chinese junks showed characteristics of Austronesian ships that they are made using timbers of tropical origin, with keeled, V-shaped hull. This is different from northern Chinese junks, which are developed from flat-bottomed riverine boats. The northern Chinese junks were primarily built of pine or fir wood, had flat bottoms with no keel, water-tight bulkheads with no frames, transom (squared) stern and stem, and have their planks fastened with iron nails or clamps. It was unknown when the Chinese people started adopting Southeast Asian (Austronesian) shipbuilding techniques. They may have been started as early as the 8th century, but the development was gradual and the true ocean-going Chinese junks did not appear suddenly. The word "po" survived in Chinese long after, referring to the large ocean-going junks.


Mediterranean

In September 2011, archeological investigations done at the site of Portus in
Rome , established_title = Founded , established_date = 753 BC , founder = King Romulus (legendary) , image_map = Map of comune of Rome (metropolitan city of Capital Rome, region Lazio, Italy).svg , map_caption ...
revealed inscriptions in a shipyard constructed during the reign of
Trajan Trajan ( ; la, Caesar Nerva Traianus; 18 September 539/11 August 117) was Roman emperor from 98 to 117. Officially declared ''optimus princeps'' ("best ruler") by the senate, Trajan is remembered as a successful soldier-emperor who presi ...
(98–117) that indicated the existence of a shipbuilders
guild A guild ( ) is an association of artisans and merchants who oversee the practice of their craft/trade in a particular area. The earliest types of guild formed as organizations of tradesmen belonging to a professional association. They sometimes ...
.


Early 2nd millennium AD


Austronesia

Roughly at this time is the last migration wave of the
Austronesian expansion The Austronesian peoples, sometimes referred to as Austronesian-speaking peoples, are a large group of peoples in Taiwan, Maritime Southeast Asia, Micronesia, coastal New Guinea, Island Melanesia, Polynesia, and Madagascar that speak Austron ...
, when the
Polynesia Polynesia () "many" and νῆσος () "island"), to, Polinisia; mi, Porinihia; haw, Polenekia; fj, Polinisia; sm, Polenisia; rar, Porinetia; ty, Pōrīnetia; tvl, Polenisia; tkl, Polenihia (, ) is a subregion of Oceania, made up of ...
n islands spread over vast distances across the
Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the contin ...
were being colonized by the (Austronesian) Polynesians from
Island Melanesia Island Melanesia is a subregion of Melanesia in Oceania. It is located east of New Guinea island, from the Bismarck Archipelago to New Caledonia.Steadman, 2006. ''Extinction & biogeography of tropical Pacific birds'' See also Archaeology an ...
using double-hulled voyaging catamarans. At its furthest extent, there is a possibility that they may have reached the
Americas The Americas, which are sometimes collectively called America, are a landmass comprising the totality of North and South America. The Americas make up most of the land in Earth's Western Hemisphere and comprise the New World. Along with th ...
. After the 11th century, a new type of ship called djong or
jong Jong may refer to: Surname *Chung (Korean surname), spelled Jong in North Korea *Zhong (surname), spelled Jong in the Gwoyeu Romatzyh system *Common Dutch surname "de Jong"; see ** De Jong ** De Jonge ** De Jongh *Erica Jong (born 1942), American ...
was recorded in Java and Bali. This type of ship was built using wooden dowels and treenails, unlike the ''kunlun bo'' which used vegetal fibres for lashings. The empire of Majapahit used jong, built in northern Java, for transporting troops overseas. The jongs were transport ships which could carry 100–2000 tons of cargo and 50–1000 people, 28.99–88.56 meter in length. The exact number of jong fielded by Majapahit is unknown, but the largest number of jong deployed in an expedition is about 400 jongs, when Majapahit attacked Pasai, in 1350.Hill (June 1960). "
Hikayat Raja-Raja Pasai Hikayat Raja-raja Pasai (حكاية راج-راج ڤاسا translated as “Chronicle of the Kings of Pasai”) is perhaps the earliest work in Malay on the first Malay-Muslim kingdom of Samudera-Pasai. In the story, Merah Silu met Muhammad in his ...
". ''Journal of the Malaysian Branch of the Royal Asiatic Society''. 33: p. 98 and 157: "Then he directed them to make ready all the equipment and munitions of war needed for an attack on the land of Pasai – about four hundred of the largest junks, and also many barges (malangbang) and galleys." See also Nugroho (2011). p. 270 and 286, quoting ''Hikayat Raja-Raja Pasai'', 3: 98: "''Sa-telah itu, maka di-suroh baginda musta'idkan segala kelengkapan dan segala alat senjata peperangan akan mendatangi negeri Pasai itu, sa-kira-kira empat ratus jong yang besar-besar dan lain daripada itu banyak lagi daripada malangbang dan kelulus''." (After that, he is tasked by His Majesty to ready all the equipment and all weapons of war to come to that country of Pasai, about four hundred large jongs and other than that much more of malangbang and kelulus.)


Europe

Until recently, Viking
longship Longships were a type of specialised Scandinavian warships that have a long history in Scandinavia, with their existence being archaeologically proven and documented from at least the fourth century BC. Originally invented and used by the Nors ...
s were seen as marking a very considerable advance on traditional clinker-built hulls of plank boards tied together with
leather Leather is a strong, flexible and durable material obtained from the tanning, or chemical treatment, of animal skins and hides to prevent decay. The most common leathers come from cattle, sheep, goats, equine animals, buffalo, pigs and hog ...
thongs. This consensus has recently been challenged. Haywood has argued that earlier Frankish and Anglo-Saxon nautical practice was much more accomplished than had been thought and has described the distribution of clinker ''vs.'' carvel construction in Western Europe (see ma

. An insight into shipbuilding in the North Sea/Baltic areas of the early medieval period was found at Sutton Hoo, England, where a ship was buried with a chieftain. The ship was long and wide. Upward from the keel, the hull was made by overlapping nine
strake On a vessel's hull, a strake is a longitudinal course of planking or plating which runs from the boat's stempost (at the bows) to the sternpost or transom (at the rear). The garboard strakes are the two immediately adjacent to the keel on ea ...
s on either side with rivets fastening the oaken planks together. It could hold upwards of thirty men. Sometime around the 12th century, northern European ships began to be built with a straight
sternpost A sternpost is the upright structural member or post at the stern of a (generally wooden) ship or a boat, to which are attached the transoms and the rearmost left corner part of the stern. The sternpost may either be completely vertical or may ...
, enabling the mounting of a rudder, which was much more durable than a steering oar held over the side. Development in the
Middle Ages In the history of Europe, the Middle Ages or medieval period lasted approximately from the late 5th to the late 15th centuries, similar to the post-classical period of global history. It began with the fall of the Western Roman Empire ...
favored "round ships", with a broad beam and heavily curved at both ends. Another important ship type was the galley, which was constructed with both sails and oars. The first extant treatise on shipbuilding was written c. 1436 by Michael of Rhodes, a man who began his career as an oarsman on a Venetian galley in 1401 and worked his way up into officer positions. He wrote and illustrated a book that contains a treatise on shipbuilding, a treatise on mathematics, much material on astrology, and other materials. His treatise on shipbuilding treats three kinds of galleys and two kinds of round ships.


China

Shipbuilders in the
Ming dynasty The Ming dynasty (), officially the Great Ming, was an imperial dynasty of China, ruling from 1368 to 1644 following the collapse of the Mongol-led Yuan dynasty. The Ming dynasty was the last orthodox dynasty of China ruled by the Han peo ...
(1368~1644) were not the same as the shipbuilders in other Chinese dynasties, due to hundreds of years of accumulated experiences and rapid changes in the Ming dynasty. Shipbuilders in the Ming dynasty primarily worked for the government, under command of the
Ministry of Public Works This list indicates government departments in various countries dedicated to public works or infrastructure. See also * Public works * Ministry or Board of Public Works, the imperial Chinese ministry overseeing public projects from the Tang ...
. During the early years of the Ming dynasty, the Ming government maintained an open policy towards sailing. Between 1405 and 1433, the government conducted seven diplomatic
Ming treasure voyages The Ming treasure voyages were the seven maritime expeditions undertaken by Ming China's treasure fleet between 1405 and 1433. The Yongle Emperor ordered the construction of the treasure fleet in 1403. The grand project resulted in far-reachi ...
to over thirty countries in Southeast Asia, India, the Middle East and Eastern Africa. The voyages were initiated by the
Yongle Emperor The Yongle Emperor (; pronounced ; 2 May 1360 – 12 August 1424), personal name Zhu Di (), was the third Emperor of the Ming dynasty, reigning from 1402 to 1424. Zhu Di was the fourth son of the Hongwu Emperor, the founder of the Ming dyn ...
, and led by the Admiral
Zheng He Zheng He (; 1371–1433 or 1435) was a Chinese mariner, explorer, diplomat, fleet admiral, and court eunuch during China's early Ming dynasty. He was originally born as Ma He in a Muslim family and later adopted the surname Zheng conferr ...
. Six voyages were conducted under the Yongle Emperor's reign, the last of which returned to China in 1422. After the Yongle Emperor's death in 1424, his successor the
Hongxi Emperor The Hongxi Emperor (16 August 1378 – 29 May 1425), personal name Zhu Gaochi (朱高熾), was the fourth Emperor of the Ming dynasty, reigned from 1424 to 1425. He succeeded his father, the Yongle Emperor, in 1424. His era name "Hongxi" means ...
ordered the suspension of the voyages. The seventh and final voyage began in 1430, sent by the
Xuande Emperor The Xuande Emperor (16 March 1399 31 January 1435), personal name Zhu Zhanji (朱瞻基), was the fifth Emperor of the Ming dynasty, reigned from 1425 to 1435. His era name "Xuande" means "proclamation of virtue". Ruling over a relatively ...
. Although the Hongxi and Xuande Emperors did not emphasize sailing as much as the Yongle Emperor, they were not against it. This led to a high degree of commercialization and an increase in trade. Large numbers of ships were built to meet the demand. The Ming voyages were large in size, numbering as many as 300 ships and 28,000 men. The shipbuilders were brought from different places in China to the shipyard in
Nanjing Nanjing (; , Mandarin pronunciation: ), alternately romanized as Nanking, is the capital of Jiangsu province of the People's Republic of China. It is a sub-provincial city, a megacity, and the second largest city in the East China region. T ...
, including
Zhejiang Zhejiang ( or , ; , Chinese postal romanization, also romanized as Chekiang) is an East China, eastern, coastal Provinces of China, province of the People's Republic of China. Its capital and largest city is Hangzhou, and other notable citie ...
,
Jiangxi Jiangxi (; ; formerly romanized as Kiangsi or Chianghsi) is a landlocked province in the east of the People's Republic of China. Its major cities include Nanchang and Jiujiang. Spanning from the banks of the Yangtze river in the north int ...
,
Fujian Fujian (; alternately romanized as Fukien or Hokkien) is a province on the southeastern coast of China. Fujian is bordered by Zhejiang to the north, Jiangxi to the west, Guangdong to the south, and the Taiwan Strait to the east. Its cap ...
, and
Huguang Huguang was a province of China during the Yuan and Ming dynasties. It was founded by the Yuan dynasty in 1274. During the Yuan dynasty it included the areas of modern Hubei south of the Yangtze river, Hunan, Guizhou, and Guangxi. During the Ming ...
(now the provinces of
Hubei Hubei (; ; alternately Hupeh) is a landlocked province of the People's Republic of China, and is part of the Central China region. The name of the province means "north of the lake", referring to its position north of Dongting Lake. The ...
and
Hunan Hunan (, ; ) is a landlocked province of the People's Republic of China, part of the South Central China region. Located in the middle reaches of the Yangtze watershed, it borders the province-level divisions of Hubei to the north, Jiangxi ...
). One of the most famous shipyards was Long Jiang Shipyard ( :zh:龙江船厂), located in Nanjing near the Treasure Shipyard where the ocean-going ships were built. The shipbuilders could built 24 models of ships of varying sizes. Several types of ships were built for the voyages, including ''Shachuan'' (沙船), ''Fuchuan'' (福船) and ''Baochuan'' ( treasure ship) (宝船). Zheng He's treasure ships were regarded as ''Shachuan'' types, mainly because they were made in the treasure shipyard in Nanjing. ''Shachuan'', or 'sand-ships', are ships used primarily for inland transport. However, in recent years, some researchers agree that the treasure ships were more of the ''Fuchuan'' type. It is said in vol.176 of ''San Guo Bei Meng Hui Bian'' (三朝北盟汇编) that ships made in Fujian are the best ones. Therefore, the best shipbuilders and laborers were brought from these places to support Zheng He's expedition. The shipyard was under the command of
Ministry of Public Works This list indicates government departments in various countries dedicated to public works or infrastructure. See also * Public works * Ministry or Board of Public Works, the imperial Chinese ministry overseeing public projects from the Tang ...
. The shipbuilders had no control over their lives. The builders, commoner's doctors, cooks and errands had lowest social status. The shipbuilders were forced to move away from their hometown to the shipyards. There were two major ways to enter the shipbuilder occupation: family tradition, or apprenticeship. If a shipbuilder entered the occupation due to family tradition, the shipbuilder learned the techniques of shipbuilding from his family and is very likely to earn a higher status in the shipyard. Additionally, the shipbuilder had access to business networking that could help to find clients. If a shipbuilder entered the occupation through an apprenticeship, the shipbuilder was likely a farmer before he was hired as a shipbuilder, or he was previously an experienced shipbuilder. Many shipbuilders working in the shipyard were forced into the occupation. The ships built for Zheng He's voyages needed to be waterproof, solid, safe, and have ample room to carry large amounts of trading goods. Therefore, due to the highly commercialized society that was being encouraged by the expeditions, trades, and government policies, the shipbuilders needed to acquire the skills to build ships that fulfil these requirements. Shipbuilding was not the sole industry utilising Chinese lumber at that time; the new capital was being built in Beijing from approximately 1407 onwards, which required huge amounts of high-quality wood. These two ambitious projects commissioned by Emperor Yongle would have had enormous environmental and economic effects, even if the ships were half the dimensions given in the ''
History of Ming The ''History of Ming'' or the ''Ming History'' (''Míng Shǐ'') is one of the official Chinese historical works known as the ''Twenty-Four Histories''. It consists of 332 volumes and covers the history of the Ming dynasty from 1368 to 1644. It ...
''. Considerable pressure would also have been placed on the infrastructure required to transport the trees from their point of origin to the shipyards. Shipbuilders were usually divided into different groups and had separate jobs. Some were responsible for fixing old ships; some were responsible for making the keel and some were responsible for building the helm. * It was the
keel The keel is the bottom-most longitudinal structural element on a vessel. On some sailboats, it may have a hydrodynamic and counterbalancing purpose, as well. As the laying down of the keel is the initial step in the construction of a ship, in Br ...
that determined the shape and the structure of the hull of ''Fuchuan'' Ships. The keel is the middle of the bottom of the hull, constructed by connecting three sections; stern keel, main keel and poop keel. The hull spreads in the arc towards both sides forming the keel. * The
helm Helm may refer to: Common meanings * a ship's steering mechanism; see tiller and ship's wheel * another term for helmsman * an archaic term for a helmet, used as armor Arts and entertainment * Matt Helm, a character created by Donald Hamilton * ...
was the device that controls direction when sailing. It was a critical invention in shipbuilding technique in ancient China and was only used by the Chinese for a fairly long time. With a developing recognition of its function, the shape and configuration of the helm was continually improved by shipbuilders. The shipbuilders not only needed to build the ship according to design, but needed to acquire the skills to improve the ships. After 1477, the Ming government reversed its open maritime policies, enacting a series of isolationist policies in response to
piracy Piracy is an act of robbery or criminal violence by ship or boat-borne attackers upon another ship or a coastal area, typically with the goal of stealing cargo and other valuable goods. Those who conduct acts of piracy are called pirates, v ...
. The policies, called ''
Haijin The Haijin () or sea ban was a series of related isolationist policies in China restricting private maritime trading and coastal settlement during most of the Ming dynasty and early Qing dynasty. Despite official proclamations the Ming policy was ...
'' (sea ban), lasted until the end of the Ming dynasty in 1644. During this period, Chinese navigation technology did not make any progress and even declined in some aspect.


Indian Ocean

In the Islamic world, shipbuilding thrived at
Basra Basra ( ar, ٱلْبَصْرَة, al-Baṣrah) is an Iraqi city located on the Shatt al-Arab. It had an estimated population of 1.4 million in 2018. Basra is also Iraq's main port, although it does not have deep water access, which is han ...
and
Alexandria Alexandria ( or ; ar, ٱلْإِسْكَنْدَرِيَّةُ ; grc-gre, Αλεξάνδρεια, Alexándria) is the second largest city in Egypt, and the largest city on the Mediterranean coast. Founded in by Alexander the Great, Alexandri ...
. The
dhow Dhow ( ar, داو, translit=dāwa; mr, script=Latn, dāw) is the generic name of a number of traditional sailing vessels with one or more masts with settee or sometimes lateen sails, used in the Red Sea and Indian Ocean region. Typically spo ...
,
felucca A felucca ( ar, فلوكة, falawaka, possibly originally from Greek , ) is a traditional wooden sailing boat used in the eastern Mediterranean—including around Malta and Tunisia—in Egypt and Sudan (particularly along the Nile and in protect ...
, baghlah, and the
sambuk Sanbuk (ultimately from Middle Persian ), known in New Persian as Sunbūk (), in Turkish as Zambuk and in Arabic as Sanbūk (), Sanbūq () and Ṣunbūq (), is a type of dhow, a traditional wooden sailing vessel. It has a characteristic keel des ...
became symbols of successful maritime trade around the
Indian Ocean The Indian Ocean is the third-largest of the world's five oceanic divisions, covering or ~19.8% of the water on Earth's surface. It is bounded by Asia to the north, Africa to the west and Australia to the east. To the south it is bounded by t ...
from the ports of East Africa to
Southeast Asia Southeast Asia, also spelled South East Asia and South-East Asia, and also known as Southeastern Asia, South-eastern Asia or SEA, is the geographical south-eastern region of Asia, consisting of the regions that are situated south of mainlan ...
and the ports of Sindh and
Hind A hind is a female deer, especially a red deer. Places * Hind (Sasanian province, 262-484) * Hind and al-Hind, a Persian and Arabic name for the Indian subcontinent * Hind (crater), a lunar impact crater * 1897 Hind, an asteroid Military ...
(India) during the
Abbasid The Abbasid Caliphate ( or ; ar, الْخِلَافَةُ الْعَبَّاسِيَّة, ') was the third caliphate to succeed the Islamic prophet Muhammad. It was founded by a dynasty descended from Muhammad's uncle, Abbas ibn Abdul-Muttalib ...
period.


Early modern


Bengal

Mughal Empire The Mughal Empire was an early-modern empire that controlled much of South Asia between the 16th and 19th centuries. Quote: "Although the first two Timurid emperors and many of their noblemen were recent migrants to the subcontinent, the d ...
had a large shipbuilding industry, which was largely centred in the
Bengal Subah The Bengal Subah ( bn, সুবাহ বাংলা; fa, ), also referred to as Mughal Bengal ( bn, মোগল বাংলা), was the largest subdivision of the Mughal Empire (and later an independent state under the Nawabs of Be ...
. Economic historian Indrajit Ray estimates shipbuilding output of Bengal during the sixteenth and seventeenth centuries at 223,250 tons annually, compared with 23,061 tons produced in nineteen colonies in North America from 1769 to 1771. He also assesses ship repairing as very advanced in Bengal. Shipbuilding in Bengal was advanced compared to European shipbuilding at the time, with Bengal selling ships to European firms. An important innovation in shipbuilding was the introduction of a flushed deck design in Bengal rice ships, resulting in hulls that were stronger and less prone to leak than the structurally weak hulls of traditional European ships built with a stepped deck design. The British
East India Company The East India Company (EIC) was an English, and later British, joint-stock company founded in 1600 and dissolved in 1874. It was formed to trade in the Indian Ocean region, initially with the East Indies (the Indian subcontinent and South ...
later duplicated the flushed deck and hull designs of Bengal rice ships in the 1760s, leading to significant improvements in
seaworthiness Seakeeping ability or seaworthiness is a measure of how well-suited a watercraft is to conditions when underway. A ship or boat which has good seakeeping ability is said to be very seaworthy and is able to operate effectively even in high sea stat ...
and navigation for European ships during the
Industrial Revolution The Industrial Revolution was the transition to new manufacturing processes in Great Britain, continental Europe, and the United States, that occurred during the period from around 1760 to about 1820–1840. This transition included going f ...
.


West Africa

Documents from 1506, for example, refer to
watercraft Any vehicle used in or on water as well as underwater, including boats, ships, hovercraft and submarines, is a watercraft, also known as a water vessel or waterborne vessel. A watercraft usually has a propulsive capability (whether by sail, ...
on the
Sierra Leone Sierra Leone,)]. officially the Republic of Sierra Leone, is a country on the southwest coast of West Africa. It is bordered by Liberia to the southeast and Guinea surrounds the northern half of the nation. Covering a total area of , Sierr ...
river carrying 120 men. Others refer to Guinea coast peoples using war canoes of varying sizes – some 70 feet in length, 7–8 feet broad, with sharp pointed ends, rowing benches on the side, and quarterdecks or
forecastle The forecastle ( ; contracted as fo'c'sle or fo'c's'le) is the upper deck of a sailing ship forward of the foremast, or, historically, the forward part of a ship with the sailors' living quarters. Related to the latter meaning is the phrase " be ...
s build of reeds. The watercraft included miscellaneous facilities, such as cooking hearths, and storage spaces for the crew's sleeping mats. From the 17th century, some kingdoms added brass or iron cannons to their vessels. By the 18th century, however, the use of swivel cannons on war canoes accelerated. The city-state of
Lagos Lagos (Nigerian English: ; ) is the largest city in Nigeria and the second most populous city in Africa, with a population of 15.4 million as of 2015 within the city proper. Lagos was the national capital of Nigeria until December 1991 fo ...
, for instance, deployed war canoes armed with swivel cannons.


Europe

With the development of the carrack, the west moved into a new era of ship construction by building the first regular oceangoing vessels. In a relatively short time, these ships grew to an unprecedented size, complexity, and cost. Shipyards became large industrial complexes, and the ships built were financed by consortia of investors. These considerations led to the documentation of design and construction practices in what had previously been a secretive trade run by master shipwrights and ultimately led to the field of
naval architecture Naval architecture, or naval engineering, is an engineering discipline incorporating elements of mechanical, electrical, electronic, software and safety engineering as applied to the engineering design process, shipbuilding, maintenance, and ...
, in which professional designers and draftsmen played an increasingly important role. Even so, construction techniques changed only very gradually. The ships of the
Napoleonic Wars The Napoleonic Wars (1803–1815) were a series of major global conflicts pitting the French Empire and its allies, led by Napoleon I, against a fluctuating array of European states formed into various coalitions. It produced a period of Fren ...
were still built more or less to the same basic plan as those of the Spanish Armada of two centuries earlier, although there had been numerous subtle improvements in ship design and construction throughout this period. For instance, the introduction of
tumblehome Tumblehome is a term describing a hull which grows narrower above the waterline than its beam. The opposite of tumblehome is flare. A small amount of tumblehome is normal in many naval architecture designs in order to allow any small projecti ...
, adjustments to the shapes of sails and hulls, the introduction of the wheel, the introduction of hardened copper fastenings below the waterline, the introduction of copper sheathing as a deterrent to shipworm and fouling, etc.


Industrial Revolution

Though still largely based on pre-industrial era materials and designs, ships greatly improved during the early
Industrial Revolution The Industrial Revolution was the transition to new manufacturing processes in Great Britain, continental Europe, and the United States, that occurred during the period from around 1760 to about 1820–1840. This transition included going f ...
period (1760 to 1825), as "the risk of being wrecked for Atlantic shipping fell by one-third, and of foundering by two thirds, reflecting improvements in seaworthiness and navigation respectively." The improvements in seaworthiness have been credited to "replacing the traditional stepped deck ship with stronger flushed decked ones derived from
Indian Indian or Indians may refer to: Peoples South Asia * Indian people, people of Indian nationality, or people who have an Indian ancestor ** Non-resident Indian, a citizen of India who has temporarily emigrated to another country * South Asia ...
designs, and the increasing use of iron reinforcement." The design originated from
Bengal Bengal ( ; bn, বাংলা/বঙ্গ, translit=Bānglā/Bôngô, ) is a geopolitical, cultural and historical region in South Asia, specifically in the eastern part of the Indian subcontinent at the apex of the Bay of Bengal, predom ...
rice ships, with Bengal being famous for its shipbuilding industry at the time. Iron was gradually adopted in ship construction, initially to provide stronger joints in a wooden hull e.g. as deck knees, hanging knees, knee riders and the other sharp joints, ones in which a curved, progressive joint could not be achieved. One study finds that there were considerable improvements in ship speed from 1750 to 1850: "we find that average sailing speeds of British ships in moderate to strong winds rose by nearly a third. Driving this steady progress seems to be the continuous evolution of sails and rigging, and improved hulls that allowed a greater area of sail to be set safely in a given wind. By contrast, looking at every voyage between the Netherlands and East Indies undertaken by the Dutch East India Company from 1595 to 1795, we find that journey time fell only by 10 percent, with no improvement in the heavy mortality, averaging six percent per voyage, of those aboard." Initially copying wooden construction traditions with a frame over which the hull was fastened,
Isambard Kingdom Brunel Isambard Kingdom Brunel (; 9 April 1806 – 15 September 1859) was a British civil engineer who is considered "one of the most ingenious and prolific figures in engineering history," "one of the 19th-century engineering giants," and "on ...
's of 1843 was the first radical new design, being built entirely of wrought iron. Despite her success, and the great savings in cost and space provided by the iron hull, compared to a copper-sheathed counterpart, there remained problems with fouling due to the adherence of weeds and barnacles. As a result,
composite construction Composite construction is a generic term to describe any building construction involving multiple dissimilar materials. Composite construction is often used in building aircraft, watercraft, and building construction. There are several reasons to ...
remained the dominant approach where fast ships were required, with wooden timbers laid over an iron frame (''
Cutty Sark ''Cutty Sark'' is a British clipper ship. Built on the River Leven, Dumbarton, Scotland in 1869 for the Jock Willis Shipping Line, she was one of the last tea clippers to be built and one of the fastest, coming at the end of a long period ...
'' is a famous example). Later ''Great Britain''s iron hull was sheathed in wood to enable it to carry a copper-based sheathing. Brunel's represented the next great development in shipbuilding. Built-in association with
John Scott Russell John Scott Russell FRSE FRS FRSA (9 May 1808, Parkhead, Glasgow – 8 June 1882, Ventnor, Isle of Wight) was a Scottish civil engineer, naval architect and shipbuilder who built '' Great Eastern'' in collaboration with Isambard Kingdom Brune ...
, it used longitudinal
stringer Stringer may refer to: Structural elements * Stringer (aircraft), or longeron, a strip of wood or metal to which the skin of an aircraft is fastened * Stringer (slag), an inclusion, possibly leading to a defect, in cast metal * Stringer (stairs), ...
s for strength, inner and outer hulls, and bulkheads to form multiple watertight compartments. Steel also supplanted
wrought iron Wrought iron is an iron alloy with a very low carbon content (less than 0.08%) in contrast to that of cast iron (2.1% to 4%). It is a semi-fused mass of iron with fibrous slag inclusions (up to 2% by weight), which give it a wood-like "grain" ...
when it became readily available in the latter half of the 19th century, providing great savings when compared with iron in cost and weight. Wood continued to be favored for the decks. During
World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing ...
, the need for cargo ships was so great that construction time for
Liberty ship Liberty ships were a class of cargo ship built in the United States during World War II under the Emergency Shipbuilding Program. Though British in concept, the design was adopted by the United States for its simple, low-cost construction. Ma ...
s went from initially eight months or longer, down to weeks or even days. They employed production line and prefabrication techniques such as those used in shipyards today. The total number of dry-cargo ships built in the United States in a 15-year period just before the war was a grand total of two. During the war, thousands of Liberty ships and
Victory ships The Victory ship was a ship class, class of cargo ship produced in large numbers by North American shipyards during World War II to replace losses caused by Kriegsmarine, German submarines. They were a more modern design compared to the earlier ...
s were built, many of them in shipyards that didn't exist before the war. And, they were built by a workforce consisting largely of women and other inexperienced workers who had never seen a ship before (or even the ocean).


Worldwide shipbuilding industry

After
World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing ...
, shipbuilding (which encompasses the shipyards, the marine equipment manufacturers, and many related service and
knowledge Knowledge can be defined as Descriptive knowledge, awareness of facts or as Procedural knowledge, practical skills, and may also refer to Knowledge by acquaintance, familiarity with objects or situations. Knowledge of facts, also called pro ...
providers) grew as an important and strategic industry in a number of countries around the world. This importance stems from: * The large number of
skilled workers A skilled worker is any worker who has special skill, training, knowledge which they can then apply to their work. A skilled worker may have attended a college, university or technical school. Alternatively, a skilled worker may have learned their ...
required directly by the shipyard, along with supporting industries such as steel mills, railroads and
engine An engine or motor is a machine designed to convert one or more forms of energy into mechanical energy. Available energy sources include potential energy (e.g. energy of the Earth's gravitational field as exploited in hydroelectric power ...
manufacturers; and * A nation's need to manufacture and repair its own
navy A navy, naval force, or maritime force is the branch of a nation's armed forces principally designated for naval and amphibious warfare; namely, lake-borne, riverine, littoral, or ocean-borne combat operations and related functions. It in ...
and vessels that support its primary industries Historically, the industry has suffered from the absence of global rules and a tendency towards (
state State may refer to: Arts, entertainment, and media Literature * ''State Magazine'', a monthly magazine published by the U.S. Department of State * ''The State'' (newspaper), a daily newspaper in Columbia, South Carolina, United States * ''Our S ...
- supported) over-investment due to the fact that shipyards offer a wide range of technologies, employ a significant number of workers, and generate income as the shipbuilding market is
global Global means of or referring to a globe and may also refer to: Entertainment * ''Global'' (Paul van Dyk album), 2003 * ''Global'' (Bunji Garlin album), 2007 * ''Global'' (Humanoid album), 1989 * ''Global'' (Todd Rundgren album), 2015 * Bruno ...
. Japan used shipbuilding in the 1950s and 1960s to rebuild its industrial structure;
South Korea South Korea, officially the Republic of Korea (ROK), is a country in East Asia, constituting the southern part of the Korean Peninsula and sharing a land border with North Korea. Its western border is formed by the Yellow Sea, while its eas ...
started to make shipbuilding a strategic industry in the 1970s, and China is now in the process of repeating these models with large state-supported investments in this industry. Conversely, Croatia is privatising its shipbuilding industry. As a result, the world shipbuilding market suffers from over-capacities, depressed prices (although the industry experienced a price increase in the period 2003–2005 due to strong demand for new ships which was in excess of actual cost increases), low profit margins, trade distortions and widespread subsidisation. All efforts to address the problems in the OECD have so far failed, with the 1994 international shipbuilding agreement never entering into force and the 2003–2005 round of negotiations being paused in September 2005 after no agreement was possible. After numerous efforts to restart the negotiations these were formally terminated in December 2010. The OECD's Council Working Party on Shipbuilding (WP6) will continue its efforts to identify and progressively reduce factors that distort the shipbuilding market. Where
state State may refer to: Arts, entertainment, and media Literature * ''State Magazine'', a monthly magazine published by the U.S. Department of State * ''The State'' (newspaper), a daily newspaper in Columbia, South Carolina, United States * ''Our S ...
subsidies A subsidy or government incentive is a form of financial aid or support extended to an economic sector (business, or individual) generally with the aim of promoting economic and social policy. Although commonly extended from the government, the ter ...
have been removed and domestic
industrial policies An industrial policy (IP) or industrial strategy of a country is its official strategic effort to encourage the development and growth of all or part of the economy, often focused on all or part of the manufacturing sector. The government takes m ...
do not provide support in high labor cost countries, shipbuilding has gone into decline. The British shipbuilding industry is a prime example of this with its industries suffering badly from the 1960s. In the early 1970s British yards still had the capacity to build all types and sizes of merchant ships but today they have been reduced to a small number specialising in defence contracts, luxury yachts and repair work. Decline has also occurred in other European countries, although to some extent this has reduced by protective measures and industrial support policies. In the US, the Jones Act (which places restrictions on the ships that can be used for moving domestic cargoes) has meant that merchant shipbuilding has continued, albeit at a reduced rate, but such protection has failed to penalise shipbuilding inefficiencies. The consequence of this is that contract prices are far higher than those of any other country building oceangoing ships.


Present day shipbuilding

Beyond the 2000s, China,
South Korea South Korea, officially the Republic of Korea (ROK), is a country in East Asia, constituting the southern part of the Korean Peninsula and sharing a land border with North Korea. Its western border is formed by the Yellow Sea, while its eas ...
, Japan have dominated world shipbuilding by completed gross tonnage.
China State Shipbuilding Corporation The China State Shipbuilding Corporation (CSSC) is a Chinese shipbuilding conglomerate. Description CSSC is one of the top 10 defence groups in China. It consists of various shipyards, equipment manufacturers, research institutes and shipbu ...
,
China Shipbuilding Industry Corporation The China Shipbuilding Industry Corporation (CSIC) was one of the two largest shipbuilding conglomerates in China, the other was the China State Shipbuilding Corporation (CSSC). It was formed by the Government of the People's Republic of Chin ...
, Hyundai Heavy Industries,
Samsung Heavy Industries Samsung Heavy Industries Co., Ltd. (Korean: 삼성중공업) is one of the largest shipbuilders in the world and one of the "Big Three" shipbuilders of South Korea (including Hyundai and Daewoo). Geoje (in Gyeongsangnam-do) is one of the largest ...
,
Daewoo Shipbuilding & Marine Engineering Daewoo Shipbuilding & Marine Engineering Co., Ltd ( ko, 대우조선해양; abbreviated DSME) is one of the "Big Three" shipbuilders of South Korea, along with Hyundai and Samsung. History On 21 February 2011, the A. P. Moller-Maersk Group (M ...
and
Imabari Shipbuilding is a major Japanese ship building, marine engineering, and service company headquartered in Imabari, Ehime Prefecture, Japan. It is Japan’s largest shipbuilder both in terms of tonnage and sales revenue, with design, research, construct ...
supply most of the global market for large
container A container is any receptacle or enclosure for holding a product used in storage, packaging, and transportation, including shipping. Things kept inside of a container are protected on several sides by being inside of its structure. The term ...
,
bulk carrier A bulk carrier or bulker is a merchant ship specially designed to transport unpackaged bulk cargo — such as grains, coal, ore, steel coils, and cement — in its cargo holds. Since the first specialized bulk carrier was built in 1852, eco ...
, tanker and
Ro-ro Roll-on/roll-off (RORO or ro-ro) ships are cargo ships designed to carry wheeled cargo, such as cars, motorcycles, trucks, semi-trailer trucks, buses, trailers, and railroad cars, that are driven on and off the ship on their own wheels or using ...
ships. When referring to the type, then China, South Korea and Japan are the producing countries of the carrier ships as mentioned above. While
Italy Italy ( it, Italia ), officially the Italian Republic, ) or the Republic of Italy, is a country in Southern Europe. It is located in the middle of the Mediterranean Sea, and its territory largely coincides with the homonymous geographical ...
,
France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of overseas regions and territories in the Americas and the Atlantic, Pacific and Indian Oceans. Its metropolitan area ...
,
Finland Finland ( fi, Suomi ; sv, Finland ), officially the Republic of Finland (; ), is a Nordic country in Northern Europe. It shares land borders with Sweden to the northwest, Norway to the north, and Russia to the east, with the Gulf of B ...
and
Germany Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwe ...
and other country in Europe are the makers of
cruise ships Cruise ships are large passenger ships used mainly for vacationing. Unlike ocean liners, which are used for transport, cruise ships typically embark on round-trip voyages to various ports-of-call, where passengers may go on tours known as "sho ...
(the most),
icebreakers An icebreaker is a special-purpose ship or boat designed to move and navigate through ice-covered waters, and provide safe waterways for other boats and ships. Although the term usually refers to ice-breaking ships, it may also refer to smaller ...
,
crane vessel A crane vessel, crane ship or floating crane is a ship with a crane specialized in lifting heavy loads. The largest crane vessels are used for offshore construction. Conventional monohulls are used, but the largest crane vessels are often catam ...
and so on. The market share of European ship builders began to decline in the 1960s as they lost work to Japan in the same way Japan most recently lost their work to South Korea and China. Over the four years from 2007, the total number of employees in the European shipbuilding industry declined from 150,000 to 115,000.Zagreb Institute of Public Finance
Newsletter No. 64, December 2011,
In 2022, some key shipbuilders in Europe are
Fincantieri Fincantieri S.p.A. () is an Italian shipbuilding company based in Trieste, Italy. Already the largest shipbuilder in Europe, after the acquisition of Vard in 2013, Fincantieri group doubled in size to become the fourth largest in the world (2014 ...
,
Damen Group The Damen Group is a Dutch defence, shipbuilding, and engineering conglomerate company based in Gorinchem, Netherlands. Though it is a major international group doing business in 120 countries, it remains a private family-owned company. Dame ...
,
Naval Group Naval Group is a major French industrial group specialized in naval defense design, development and construction. Its headquarters are located in Paris. Heir to the French naval dockyards initiated in 1631 by Cardinal Richelieu and to the Direc ...
and BAE Systems. The output of the United States also underwent a similar change. The US is ranked the 10th largest shipbuilder worldwide. The top companies that build large naval vessels, such as aircraft carriers and frigates, include Huntington Ingalls,
Bollinger Bollinger () is a French Champagne house, a producer of sparkling wines from the Champagne region. They produce several labels of Champagne under the Bollinger name, including the vintage ''Vieilles Vignes Françaises, Grande Année'' and ''R.D. ...
and General Dynamics. In the small to medium military vessels category, key shipbuilders include
Vigor Industrial Vigor Industrial (Vigor) is an American shipbuilding, shiprepair, and industrial service provider in the Pacific Northwest and Alaska. Based in Portland, Oregon, the company consists of several subsidiary companies for a combined total of seven ...
, and
VT Halter Marine VT Halter Marine, Inc. is a shipbuilding company and an American subsidiary of ST Engineering. It is located in Pascagoula, Mississippi. It specializes in ship design and construction and serves both public and private clients, including the Unit ...
. As the US Navy is shifting to a new fleet architecture that is more widely distributed,
Unmanned Surface Vehicle Unmanned surface vehicles (USVs), also known as unmanned surface vessels, autonomous surface vehicles (ASVs) in some cases, uncrewed surface vessels (USVs), or colloquially drone ships, or robot boats, are boats or ships that operate on the ...
s (USVs) development is rapidly propelled to higher priority. Key strategic
Program of Record The processes of government procurement in the United States enable federal, state and local government bodies in the country to acquire goods, services (including construction), and interests in real property. In fiscal year 2019, the US Feder ...
includes prototyping and construction of up to 9 MUSVs, for which a sole contract was awarded to
L3Harris L3Harris Technologies (L3Harris) is an American technology company, defense contractor, and information technology services provider that produces C6ISR systems and products, wireless equipment, tactical radios, avionics and electronic systems, ...
Technologies, who partnered with Swiftships to build the MUSVs. 2018 Defense Department initiated Overlord Program, and developed USV Prototypes 1 (NOMAD) and 2 (RANGER). Both of them took part in multiple fleet level exercises and demonstrations, traveled 28,982 nautical miles in autonomous mode, and tested numerous payloads. Nomam, formerly known as Riley Claire, is a converted offshore patrol vessel, which was built by Swiftships. The objective of the Ghost Fleet Overlord program is to convert large, commercial vessels to autonomous systems.


Modern shipbuilding manufacturing techniques

Modern shipbuilding makes considerable use of prefabricated sections. Entire multi-deck segments of the hull or superstructure will be built elsewhere in the yard, transported to the building dock or slipway, then lifted into place. This is known as "block construction". The most modern shipyards pre-install equipment, pipes, electrical cables, and any other components within the blocks, to minimize the effort needed to assemble or install components deep within the hull once it is welded together. Ship design work, also called
naval architecture Naval architecture, or naval engineering, is an engineering discipline incorporating elements of mechanical, electrical, electronic, software and safety engineering as applied to the engineering design process, shipbuilding, maintenance, and ...
, may be conducted using a
ship model basin A ship model basin is a basin or tank used to carry out hydrodynamic tests with ship models, for the purpose of designing a new (full sized) ship, or refining the design of a ship to improve the ship's performance at sea. It can also refer to th ...
. Previously, loftsmen at the
mould loft Lofting is a drafting technique to generate curved lines. It is used in plans for streamlined objects such as aircraft and boats. The lines may be drawn on wood and the wood then cut for advanced woodworking. The technique can be as simple as bend ...
s of shipyards were responsible for taking the dimensions, and details from drawings and plans and translating this information into templates, battens, ordinates, cutting sketches, profiles, margins and other data. However, since the early 1970s computer-aided design became normal for the shipbuilding design and lofting process. Modern ships, since roughly 1940, have been produced almost exclusively of
welded Welding is a fabrication process that joins materials, usually metals or thermoplastics, by using high heat to melt the parts together and allowing them to cool, causing fusion. Welding is distinct from lower temperature techniques such as braz ...
steel. Early welded steel ships used steels with inadequate fracture toughness, which resulted in some ships suffering catastrophic
brittle fracture Fracture is the separation of an object or material into two or more pieces under the action of stress. The fracture of a solid usually occurs due to the development of certain displacement discontinuity surfaces within the solid. If a displa ...
structural cracks (see problems of the Liberty ship). Since roughly 1950, specialized steels such as ABS Steels with good properties for ship construction have been used. Although it is commonly accepted that modern steel has eliminated brittle fracture in ships, some controversy still exists. Brittle fracture of modern vessels continues to occur from time to time because grade A and grade B steel of unknown toughness or fracture appearance transition temperature (FATT) in ships' side shells can be less than adequate for all ambient conditions. As modern shipbuilding panels on a panel line become lighter and thinner, the laser hybrid welding technique is utilized. The laser hybrid blend focuses a higher energy beam on the material to be joined, allowing it to keyhole with a much higher depth to width ratio than comparative traditional welding techniques. Typically a MIG process trails the keyhole providing filler material for the weld joint. This allows for very high penetration without excessive heat input from decreased weld metal deposited leading to less distortion and welding at higher travel speeds.


Ship repair industry

All ships need repair work at some point in their working lives. A part of these jobs must be carried out under the supervision of the
classification society A ship classification society or ship classification organisation is a non-governmental organization that establishes and maintains technical standards for the construction and operation of ships and offshore structures. Classification societies ...
. A lot of maintenance is carried out while at sea or in port by ship's crew. However, a large number of repair and maintenance works can only be carried out while the ship is out of commercial operation, in a ship repair yard. Prior to undergoing repairs, a tanker must dock at a deballasting station for completing the tank cleaning operations and pumping ashore its slops (dirty cleaning water and hydrocarbon residues).


See also

*
List of shipbuilders and shipyards This is a list of notable shipbuilders and shipyards: Africa Egypt * Suez shipyard * Alexandria Shipyard Asia Azerbaijan * Baku Shipyard Bangladesh * FMC Dockyard Limited * Ananda Shipyard and Shipways * Bashundhara Steel & Engineering * Kh ...
* List of the largest shipbuilding companies * List of Russian marine engineers * *


References


Notes

* *


External links


Shipbuilding Picture Dictionary

U.S. Shipbuilding
extensive information about the U.S. shipbuilding industry, including over 500 pages of U.S. shipyard construction records

United States—from GlobalSecurity.org
Shipbuilding News

Bataviawerf – the Historic Dutch East Indiaman Ship Yard
Shipyard of the historic ships Batavia and Zeven Provincien in the Netherlands, since 1985 here have been great ships reconstructed using old construction methods.
Photos of the reconstruction of the Dutch East Indiaman Batavia
—Photo web site about the reconstruction of the ''Batavia'' on the shipyard Batavia werf, a 16th-century East Indiaman in the Netherlands. The site is constantly expanding with more historic images as in 2010 the shipyard celebrates its 25th year. {{Authority control Naval architecture