Maritime Archaeology
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Maritime archaeology (also known as marine archaeology) is a discipline within
archaeology Archaeology or archeology is the study of human activity through the recovery and analysis of material culture. The archaeological record consists of Artifact (archaeology), artifacts, architecture, biofact (archaeology), biofacts or ecofacts, ...
as a whole that specifically studies human interaction with the sea, lakes and rivers through the study of associated physical remains, be they vessels, shore-side facilities, port-related structures, cargoes, human remains and submerged landscapes. A specialty within maritime archaeology is nautical archaeology, which studies ship construction and use. As with archaeology as a whole, maritime archaeology can be practised within the historical, industrial, or prehistoric periods. An associated discipline, and again one that lies within archaeology itself, is underwater archaeology, which studies the past through any submerged remains be they of maritime interest or not. An example from the prehistoric era would be the remains of submerged settlements or deposits now lying under water despite having been dry land when sea levels were lower. The study of submerged aircraft lost in lakes, rivers or in the sea is an example from the historical, industrial or modern era. Another example are the remains of discovered and potential medieval bridges connecting the islands on the lake with the mainland. Many specialist sub-disciplines within the broader maritime and underwater archaeological categories have emerged in recent years. Maritime archaeological sites often result from
shipwreck A shipwreck is the wreckage of a ship that is located either beached on land or sunken to the bottom of a body of water. It results from the event of ''shipwrecking'', which may be intentional or unintentional. There were approximately thre ...
s or sometimes
seismic activity An earthquakealso called a quake, tremor, or tembloris the shaking of the Earth's surface resulting from a sudden release of energy in the lithosphere that creates seismic waves. Earthquakes can range in intensity, from those so weak they ...
, and thus represent a moment in time rather than a slow deposition of material accumulated over a period of years, as is the case with port-related structures (such as
pier A pier is a raised structure that rises above a body of water and usually juts out from its shore, typically supported by piling, piles or column, pillars, and provides above-water access to offshore areas. Frequent pier uses include fishing, b ...
s, wharves, docks and jetties) where objects are lost or thrown off structures over extended periods of time. This fact has led to shipwrecks often being described in the media and in popular accounts as ' time capsules'. Archaeological material in the sea or in other underwater environments is typically subject to different factors than artifacts on land. However, as with terrestrial archaeology, what survives to be investigated by modern archaeologists can often be a tiny fraction of the material originally deposited. A feature of maritime archaeology is that despite all the material that is lost, there are occasional rare examples of substantial survival, from which a great deal can be learned, due to the difficulties often experienced in accessing the sites. There are those in the archaeology community who see maritime archaeology as a separate discipline with its own concerns (such as shipwrecks) and requiring the specialized skills of the underwater archaeologist. Others value an integrated approach, stressing that nautical activity has economic and social links to communities on land and that archaeology is archaeology no matter where the study is conducted. All that is required is the mastering of skills specific to the environment in which the work occurs.


Integrating land and sea

Before the industrial era, travel by water was often easier than over land. As a result, marine channels, navigable rivers and sea crossings formed the trade routes of historic and ancient civilisations. For example, the
Mediterranean Sea The Mediterranean Sea ( ) is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean basin and almost completely enclosed by land: on the east by the Levant in West Asia, on the north by Anatolia in West Asia and Southern Eur ...
was known to the Romans as the inner sea because the
Roman Empire The Roman Empire ruled the Mediterranean and much of Europe, Western Asia and North Africa. The Roman people, Romans conquered most of this during the Roman Republic, Republic, and it was ruled by emperors following Octavian's assumption of ...
spread around its coasts. The historic record as well as the remains of harbours, ships and cargoes, testify to the volume of trade that crossed it. Later, nations with a strong maritime culture such as the
United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Northwestern Europe, off the coast of European mainland, the continental mainland. It comprises England, Scotlan ...
, the
Netherlands , Terminology of the Low Countries, informally Holland, is a country in Northwestern Europe, with Caribbean Netherlands, overseas territories in the Caribbean. It is the largest of the four constituent countries of the Kingdom of the Nether ...
,
Denmark Denmark is a Nordic countries, Nordic country in Northern Europe. It is the metropole and most populous constituent of the Kingdom of Denmark,, . also known as the Danish Realm, a constitutionally unitary state that includes the Autonomous a ...
,
Portugal Portugal, officially the Portuguese Republic, is a country on the Iberian Peninsula in Southwestern Europe. Featuring Cabo da Roca, the westernmost point in continental Europe, Portugal borders Spain to its north and east, with which it share ...
and
Spain Spain, or the Kingdom of Spain, is a country in Southern Europe, Southern and Western Europe with territories in North Africa. Featuring the Punta de Tarifa, southernmost point of continental Europe, it is the largest country in Southern Eur ...
were able to establish colonies on other continents. Wars were fought at sea over the control of important resources. The material cultural remains that are discovered by maritime archaeologists along former trade routes can be combined with historical documents and material cultural remains found on land to understand the economic, social and political environment of the past. Of late maritime archaeologists have been examining the submerged cultural remains of
China China, officially the People's Republic of China (PRC), is a country in East Asia. With population of China, a population exceeding 1.4 billion, it is the list of countries by population (United Nations), second-most populous country after ...
,
India India, officially the Republic of India, is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area; the List of countries by population (United Nations), most populous country since ...
,
Korea Korea is a peninsular region in East Asia consisting of the Korean Peninsula, Jeju Island, and smaller islands. Since the end of World War II in 1945, it has been politically Division of Korea, divided at or near the 38th parallel north, 3 ...
and other Asian nations.


Preservation of material underwater

There are significant differences in the survival of archaeological material depending on whether a site is wet or dry, on the nature of the chemical environment, on the presence of biological organisms and on the dynamic forces present. Thus rocky coastlines, especially in shallow water, are typically inimical to the survival of artifacts, which can be dispersed, smashed or ground by the effect of currents and surf, possibly (but not always) leaving an artifact pattern but little if any wreck structure. Saltwater is particularly inimical to iron artefacts including metal shipwrecks, and sea organisms will readily consume organic material such as wooden shipwrecks. On the other hand, out of all the thousands of potential archaeological sites destroyed or grossly eroded by such natural processes, occasionally sites survive with exceptional preservation of a related collection of artifacts. An example of such a collection is . Survival in this instance is largely due to the remains being buried in sediment Of the many examples where the sea bed provides an extremely hostile environment for submerged evidence of history, one of the most notable, , though a relatively young wreck and in deep water so calcium-starved that concretion does not occur, appears strong and relatively intact, though indications are that it has already incurred irreversible degradation of her steel and iron hull. As such degradation inevitably continues, data will be forever lost, objects' context will be destroyed and the bulk of the wreck will over centuries completely deteriorate on the floor of the
Atlantic Ocean The Atlantic Ocean is the second largest of the world's five borders of the oceans, oceanic divisions, with an area of about . It covers approximately 17% of Earth#Surface, Earth's surface and about 24% of its water surface area. During the ...
. Comparative evidence shows that all iron and steel ships, especially those in a highly oxygenated environment, continue to degrade and will continue to do so until only their engines and other machinery project much above the sea-floor. Where it remains even after the passage of time, the iron or steel hull is often fragile with no remaining metal within the layer of concretion and corrosion products. , having been found in the 1970s, was subjected to a program of attempted ''in situ'' preservation, for example, but deterioration of the vessel progressed at such a rate that the rescue of her turret was undertaken lest nothing be saved from the wreck. Some wrecks, lost to natural obstacles to navigation, are at risk of being smashed by subsequent wrecks sunk by the same hazard, or are deliberately destroyed because they present a hazard to navigation. Even in deep water, commercial activities such as pipe-laying operations and deep sea trawling can place a wreck at risk. Such a wreck is the ''Mardi Gras''
shipwreck A shipwreck is the wreckage of a ship that is located either beached on land or sunken to the bottom of a body of water. It results from the event of ''shipwrecking'', which may be intentional or unintentional. There were approximately thre ...
sunk in the
Gulf of Mexico The Gulf of Mexico () is an oceanic basin and a marginal sea of the Atlantic Ocean, mostly surrounded by the North American continent. It is bounded on the northeast, north, and northwest by the Gulf Coast of the United States; on the southw ...
in of water. The shipwreck lay forgotten at the bottom of the sea until it was discovered in 2002 by an oilfield inspection crew working for the Okeanos Gas Gathering Company (OGGC). Large pipelines can crush sites and render some of their remnants inaccessible as pipe is dropped from the ocean surface to the substrate thousands of feet below. Trawl nets snag and tear superstructures and separate artifacts from their context. The wrecks, and other archaeological sites that have been preserved have generally survived because the dynamic nature of the sea bed can result in artifacts becoming rapidly buried in sediments. These sediments then provide an anaerobic environment which protects from further degradation. Wet environments, whether on land in the form of peat bogs and wells, or underwater are particularly important for the survival of organic material, such as wood, leather, fabric and horn. Cold and absence of light also aid survival of artifacts, because there is little energy available for either organic activity or chemical reactions. Salt water provides for greater organic activity than freshwater, and in particular, the shipworm, '' Teredo navalis'', lives only in salt water, so some of the best preservation in the absence of sediments has been found in the cold, dark waters of the
Great Lakes The Great Lakes, also called the Great Lakes of North America, are a series of large interconnected freshwater lakes spanning the Canada–United States border. The five lakes are Lake Superior, Superior, Lake Michigan, Michigan, Lake Huron, H ...
in North America and in the (low salinity)
Baltic Sea The Baltic Sea is an arm of the Atlantic Ocean that is enclosed by the countries of Denmark, Estonia, Finland, Germany, Latvia, Lithuania, Poland, Russia, Sweden, and the North European Plain, North and Central European Plain regions. It is the ...
(where ''Vasa'' was preserved). While the land surface is continuously reused by societies, the sea bed was largely inaccessible until the advent of
submarine A submarine (often shortened to sub) is a watercraft capable of independent operation underwater. (It differs from a submersible, which has more limited underwater capability.) The term "submarine" is also sometimes used historically or infor ...
s, scuba equipment and
remotely operated underwater vehicle A remotely operated underwater vehicle (ROUV) or remotely operated vehicle (ROV) is a free-swimming submersible craft used to perform underwater observation, inspection and physical tasks such as valve operations, hydraulic functions and other g ...
s (ROVs) in the twentieth century. Salvagers have operated in much earlier times, but much of the material was beyond the reach of anyone. Thus ''Mary Rose'' was subject to salvage from the sixteenth century and later, but a very large amount of material, buried in the sediments, remained to be found by maritime archaeologists of the twentieth century. While preservation in situ is not assured, material that has survived underwater and is then recovered to land is typically in an unstable state and can only be preserved using highly specialised conservation processes. While the wooden structure of ''Mary Rose'' and the individual artifacts have been undergoing conservation since their recovery, provides an example of a relatively recent (metal) wreck for which extensive conservation has been necessary to preserve the hull. While the hull remains intact, its machinery remains inoperable. The engine of that was recovered in 1985 from a saline environment after over a century underwater is presently considered somewhat anomalous, in that after two decades of treatment it can now be turned over by hand. A challenge for the modern archaeologist is to consider whether ''in-situ'' preservation, or recovery and conservation on land is the preferable option; or to face the fact that preservation in any form, other than as an archaeological record is not feasible. A site that has been discovered has typically been subjected to disturbance of the very factors that caused its survival in the first place, for example, when a covering of sediment has been removed by storms or the action of man. Active monitoring and deliberate protection may mitigate further rapid destruction making ''in situ'' preservation an option, but long-term survival can never be guaranteed. For very many sites, the costs are too great for either active measures to ensure ''in situ'' preservation or to provide for satisfactory conservation on recovery. Even the cost of proper and complete archaeological investigation may be too great to enable this to occur within a timescale that ensures that an archaeological record is made before data is inevitably lost.


Submerged sites


Prehistoric landscapes

Maritime archaeology studies
prehistoric Prehistory, also called pre-literary history, is the period of human history between the first known use of stone tools by hominins  million years ago and the beginning of recorded history with the invention of writing systems. The use o ...
al objects and sites that are, because of changes in
climate Climate is the long-term weather pattern in a region, typically averaged over 30 years. More rigorously, it is the mean and variability of meteorological variables over a time spanning from months to millions of years. Some of the meteoro ...
and
geology Geology (). is a branch of natural science concerned with the Earth and other astronomical objects, the rocks of which they are composed, and the processes by which they change over time. Modern geology significantly overlaps all other Earth ...
, now underwater. Bodies of water, fresh and saline, have been important sources of food for people for as long as we have existed. It should be no surprise that ancient villages were located at the water's edge. Since the last ice age sea level has risen as much as . Therefore, a great deal of the record of human activity throughout the Ice Age is now to be found under water. The flooding of the area now known as the
Black Sea The Black Sea is a marginal sea, marginal Mediterranean sea (oceanography), mediterranean sea lying between Europe and Asia, east of the Balkans, south of the East European Plain, west of the Caucasus, and north of Anatolia. It is bound ...
(when a land bridge, where the
Bosporus The Bosporus or Bosphorus Strait ( ; , colloquially ) is a natural strait and an internationally significant waterway located in Istanbul, Turkey. The Bosporus connects the Black Sea to the Sea of Marmara and forms one of the continental bo ...
is now, collapsed under the pressure of rising water in the
Mediterranean Sea The Mediterranean Sea ( ) is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean basin and almost completely enclosed by land: on the east by the Levant in West Asia, on the north by Anatolia in West Asia and Southern Eur ...
) submerged a great deal of human activity that had been gathered round what had been an enormous, fresh-water lake. Significant cave art sites off the coast of western Europe such as the Grotto Cosquer can be reached only by diving, because the cave entrances are underwater, though the upper portions of the caves themselves are not flooded.


Historic sites

Throughout history, seismic events have at times caused submergence of human settlements. The remains of such catastrophes exist all over the world, and sites such as
Alexandria Alexandria ( ; ) is the List of cities and towns in Egypt#Largest cities, second largest city in Egypt and the List of coastal settlements of the Mediterranean Sea, largest city on the Mediterranean coast. It lies at the western edge of the Nile ...
, Port Royal and
Mary Rose The ''Mary Rose'' was a carrack in the English Tudor navy of Henry VIII of England, King Henry VIII. She was launched in 1511 and served for 34 years in several wars against France, Scotland, and Brittany. After being substantially rebuilt in ...
now form important archaeological sites that are being protected, managed and conserved. As with shipwrecks, archaeological research can follow multiple themes, including evidence of the final catastrophe, the structures and landscape before the catastrophe and the culture and economy of which it formed a part. Unlike the wrecking of a ship, the destruction of a town by a seismic event can take place over many years and there may be evidence for several phases of damage, sometimes with rebuilding in between.


Archaeological diving

Archaeological diving is a type of scientific diving used as a method of survey and excavation in underwater archaeology. The first known use of the method comes from 1446, when
Leon Battista Alberti Leon Battista Alberti (; 14 February 1404 – 25 April 1472) was an Italian Renaissance humanist author, artist, architect, poet, Catholic priest, priest, linguistics, linguist, philosopher, and cryptography, cryptographer; he epitomised the natu ...
explored and attempted to lift the ships of Emperor Caligula in
Lake Nemi Lake Nemi (, , also called Diana's Mirror, ) is a small circular volcanic lake in the Alban Hills south of Rome in the Lazio region of Italy. It takes its name from Nemi, the largest town in the area, which overlooks it from a height. It was ...
, Italy. Just a few decades later, in 1535, the same site saw the first use of a sophisticated breathing apparatus for archaeological purposes, when Guglielmo de Lorena and Frances de Marchi used an early
diving bell A diving bell is a rigid chamber used to transport divers from the surface to depth and back in open water, usually for the purpose of performing underwater work. The most common types are the open-bottomed wet bell and the closed bell, which c ...
to explore and retrieve material from the lake, although they decided to keep the blueprint of the exact mechanism secret. The following three centuries saw the gradual extension of diving time through the use of bells and submersing barrels filled with air. In the 19th century, the standard copper helmet diving gear was developed, allowing divers to stay underwater for extended periods through a constant air supply pumped down from the surface through a hose. Nevertheless, the widespread utilisation of diving gear for archaeological purposes had to wait until the 20th century, when archaeologists began to appreciate the wealth of material that could be found under the water. This century also saw further advances in technology, most important being the invention of the aqualung by Émile Gagnan and
Jacques-Yves Cousteau Jacques-Yves Cousteau, (, also , ; 11 June 191025 June 1997) was a French naval officer, oceanographer, filmmaker and author. He co-invented the first successful open-circuit self-contained underwater breathing apparatus (SCUBA), called the A ...
, the latter of whom would go on to use the technology for underwater excavation by 1948. Modern archaeologists use two kinds of equipment to provide breathing gas underwater: self-contained underwater breathing apparatus (SCUBA), which allows for greater mobility but limits the time the diver can spend in the water, and Surface-supplied diving equipment (SSDE or SSBA), which is safer but more expensive, and airline, or hookah equipment, a basic form of surface supplied equipment with limited depth applications. Both open circuit and rebreather scuba have been used, depending on which is best suited to the site.


Equipment and procedures

*Position fixing of the site datum. Various methods were used historically, but DGPS is relatively accurate and available. *Site survey and mapping, and recording of artifact positioning relative to a datum. This may be done manually or with the aid of high resolution multibeam sonar and photogrammetry * Excavation: ** Manual excavation. **Use of airlift dredges ** Hydraulic powered suction dredges to remove silt lifted by fanning, to be deposited downcurrent. **Silt and sand blowers can be useful if the current removes the lifted material before it settles, but must be used with discretion as artifacts may be entrained in the flow if it is too strong. * Recording * Artifact recovery and conservation. Relatively recent developments, mainly for special circumstances: * First person point of view video recordings by each diver keep continuous record of work done. *Daily
photogrammetry Photogrammetry is the science and technology of obtaining reliable information about physical objects and the environment through the process of recording, measuring and interpreting photographic images and patterns of electromagnetic radiant ima ...
to record state of site in detail, stratigraphy, and for dive planning. * 360° cameras. * Diving rebreathers. * Saturation diving, * Atmospheric diving suits


Depth of sites

The depth of sites can vary within the range of ocean depth, but most sites that are accessible to diving work are relatively shallow. The wreck of a Phoenician ship off the coast of
Malta Malta, officially the Republic of Malta, is an island country in Southern Europe located in the Mediterranean Sea, between Sicily and North Africa. It consists of an archipelago south of Italy, east of Tunisia, and north of Libya. The two ...
at a depth of about has been partially excavated by divers using rebreather equipment, using techniques developed for the purpose to make the most effective use of time on site, which was restricted to 3 shifts of 12 minute each per day on site. The site of the wreck of the USS Monitor is near Cape Hatteras at depth at coordinates . When it was realised that recovering the whole vessel was not economically viable, work was done by saturation divers to recover the propeller, engine and turret. The Exosuit, a relatively lightweight and low powered Atmospheic diving suit intended for marine research. was first used in 2014 at the Bluewater and Antikythera underwater research expeditions.


Coastal and foreshore

Not all maritime sites are underwater. There are many structures at the margin of land and water that provide evidence of the human societies of the past. Some are deliberately created for access - such as bridges and walkways. Other structures remain from exploitation of resources, such as dams and fish traps. Nautical remains include early harbours and places where ships were built or repaired. At the end of their life, ships were often beached. Valuable or easily accessed timber has often been salvaged leaving just a few frames and bottom planking. Archaeological sites can also be found on the foreshore today that would have been on dry land when they were constructed. An example of such a site is Seahenge, a Bronze Age timber circle.


Ships and shipwrecks

The archaeology of shipwrecks can be divided into a three-tier hierarchy, of which the first tier considers the wrecking process itself: how does a
ship A ship is a large watercraft, vessel that travels the world's oceans and other Waterway, navigable waterways, carrying cargo or passengers, or in support of specialized missions, such as defense, research and fishing. Ships are generally disti ...
break up, how does a ship sink to the bottom, and how do the remains of the ship, cargo and the surrounding environment evolve over time? The second tier studies the ship as a machine, both in itself and in a military or economic system. The third tier consists of the archaeology of maritime cultures, in which nautical technology,
naval warfare Naval warfare is combat in and on the sea, the ocean, or any other battlespace involving a major body of water such as a large lake or wide river. The Military, armed forces branch designated for naval warfare is a navy. Naval operations can be ...
, trade and shipboard societies are studied. Some consider this to be the most important tier. Ships and boats are not necessarily wrecked: some are deliberately abandoned, scuttled or beached. Many such abandoned vessels have been extensively salvaged.


Bronze Age

The earliest boats discovered date from the
Bronze Age The Bronze Age () was a historical period characterised principally by the use of bronze tools and the development of complex urban societies, as well as the adoption of writing in some areas. The Bronze Age is the middle principal period of ...
and are constructed of hollowed out logs or sewn planks. Vessels have been discovered where they have been preserved in sediments underwater or in waterlogged land sites, such as the discovery of a canoe near St Botolphs. Examples of sewn-plank boats include those found at
North Ferriby North Ferriby is a village and civil parishes in England, civil parish in the Haltemprice area of the East Riding of Yorkshire, England. History Humber Estuary "The archaeology of the intertidal wetlands of the Humber Estuary is of internatio ...
and the Dover Bronze Age Boat which is now displayed at Dover Museum. These may be an evolution from boats made of sewn hides, but it is highly unlikely that hide boats could have survived. Ships wrecked in the sea have probably not survived, although remains of cargo (particularly bronze material) have been discovered, such as those at the Salcombe B site. A close collection of artefacts on the sea bed may imply that artefacts were from a ship, even if there are no remains of the actual vessel. Late Bronze Age ships, such as the Uluburun Shipwreck have been discovered in the Mediterranean, constructed of edge joined planks. This shipbuilding technology continued through the classical period. The 2023 announcement of the Orca Shipwreck is considered the earliest deep-sea shipwreck to be discovered.


Maritime archaeology by region


Pacific

An example of maritime archaeology in the Pacific Ocean is the discovery of the wreck of ''Two Brothers'', discovered in 2008 by a team of marine archaeologists working on an expedition for the
National Oceanic and Atmospheric Administration The National Oceanic and Atmospheric Administration (NOAA ) is an American scientific and regulatory agency charged with Weather forecasting, forecasting weather, monitoring oceanic and atmospheric conditions, Hydrography, charting the seas, ...
(NOAA). The identity of the ship was not immediately known so it was called the "Shark Island Whaler"; the ship's identification as ''Two Brothers'' was announced by NOAA on February 11, 2011, the 188th anniversary of her sinking. The wreck is the first discovery of a wrecked Nantucket whaling ship. Nine historic trade ships carrying ceramics dating back to the 10th century until the 19th century were excavated under Swedish engineer Sten Sjöstrand in the
South China Sea The South China Sea is a marginal sea of the Western Pacific Ocean. It is bounded in the north by South China, in the west by the Indochinese Peninsula, in the east by the islands of Taiwan island, Taiwan and northwestern Philippines (mainly Luz ...
. * ''Royal Nanhai'' (circa 1460), found in 1995 * ''Nanyang'' (circa 1380), found in 1995 * ''Xuande'' (circa 1540), found in 1995 * ''Longquan'' (circa 1400), found in 1996 * ''Turiang'' (circa 1370), found in 1996 * ''Singtai'' (circa 1550), found in 1998 * ''Desaru'' (circa 1830), found in 2001 * ''Tanjong Simpang'' (AD 960- 1127), found in 2001 * ''Wanli'' (early 17th century), found in 2003


Mediterranean area

In the
Mediterranean The Mediterranean Sea ( ) is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean basin and almost completely enclosed by land: on the east by the Levant in West Asia, on the north by Anatolia in West Asia and Southern ...
area, maritime archaeologists have investigated several ancient cultures. Notable early
Iron Age The Iron Age () is the final epoch of the three historical Metal Ages, after the Chalcolithic and Bronze Age. It has also been considered as the final age of the three-age division starting with prehistory (before recorded history) and progre ...
shipwrecks include two
Phoenicia Phoenicians were an Ancient Semitic-speaking peoples, ancient Semitic group of people who lived in the Phoenician city-states along a coastal strip in the Levant region of the eastern Mediterranean, primarily modern Lebanon and the Syria, Syrian ...
n ships of c. 750 BC that foundered off Gaza with cargoes of wine in
amphora An amphora (; ; English ) is a type of container with a pointed bottom and characteristic shape and size which fit tightly (and therefore safely) against each other in storage rooms and packages, tied together with rope and delivered by land ...
s. The crew of the U.S. Navy deep submergence research submarine NR-1 discovered the sites in 1997. In 1999 a team led by
Robert Ballard Robert Duane Ballard (born June 30, 1942) is an American retired Navy officer and a professor of oceanography at the University of Rhode Island who is noted for his work in underwater archaeology (maritime archaeology and archaeology of ...
and Harvard University archaeology Professor Lawrence Stager investigated the wrecks. Extensive research has been carried out on the Mediterranean and Aegean coastlines of Turkey. Complete excavations have been performed on several wrecks from the Classical,
Hellenistic In classical antiquity, the Hellenistic period covers the time in Greek history after Classical Greece, between the death of Alexander the Great in 323 BC and the death of Cleopatra VII in 30 BC, which was followed by the ascendancy of the R ...
,
Byzantine The Byzantine Empire, also known as the Eastern Roman Empire, was the continuation of the Roman Empire centred on Constantinople during late antiquity and the Middle Ages. Having survived the events that caused the fall of the Western Roman E ...
, and Ottoman periods. Maritime archaeological studies in Italy illuminate the naval and maritime activities of the
Etruscans The Etruscan civilization ( ) was an ancient civilization created by the Etruscans, a people who inhabited Etruria in List of ancient peoples of Italy, ancient Italy, with a common language and culture, and formed a federation of city-states. Af ...
, Greek colonists, and Romans. After the 2nd century BC, the Roman fleet ruled the Mediterranean and actively suppressed piracy. During this Pax Romana, seaborne trade increased significantly throughout the region. Though sailing was the safest, fastest, and most efficient method of transportation in the ancient world, some fractional percentage of voyages ended in shipwreck. With the significantly increased sea traffic during the Roman era came a corresponding increase in shipwrecks. These wrecks and their cargo remains offer glimpses through time of the economy, culture, and politics of the ancient world. Particularly useful to archaeologists are studies of
amphora An amphora (; ; English ) is a type of container with a pointed bottom and characteristic shape and size which fit tightly (and therefore safely) against each other in storage rooms and packages, tied together with rope and delivered by land ...
s, the ceramic shipping containers used in the Mediterranean region from the 15th century BC through the Medieval period. In addition to many discoveries in the sea, some wrecks have been examined in lakes. Most notable are
Caligula Gaius Caesar Augustus Germanicus (31 August 12 – 24 January 41), also called Gaius and Caligula (), was Roman emperor from AD 37 until his assassination in 41. He was the son of the Roman general Germanicus and Augustus' granddaughter Ag ...
's pleasure barges in Lake Nemi,
Italy Italy, officially the Italian Republic, is a country in Southern Europe, Southern and Western Europe, Western Europe. It consists of Italian Peninsula, a peninsula that extends into the Mediterranean Sea, with the Alps on its northern land b ...
. The
Nemi ships The Nemi ships were two ships, of different sizes, built under the reign of the Roman emperor Caligula in the 1st century AD on Lake Nemi. Although the purpose of the ships is speculated upon, the larger ship was an elaborate floating palace, w ...
and other shipwreck sites occasionally yield objects of unique artistic value. For instance, the Antikythera wreck contained a staggering collection of marble and bronze statues including the Antikythera Youth. Discovered in 1900 by Greek sponge divers, the ship probably sank in the 1st century BC and may have been dispatched by the Roman general,
Sulla Lucius Cornelius Sulla Felix (, ; 138–78 BC), commonly known as Sulla, was a Roman people, Roman general and statesman of the late Roman Republic. A great commander and ruthless politician, Sulla used violence to advance his career and his co ...
, to carry booty back to Rome. The sponge divers also recovered from the wreck the famous
Antikythera mechanism The Antikythera mechanism ( , ) is an Ancient Greece, Ancient Greek hand-powered orrery (model of the Solar System). It is the oldest known example of an Analog computer, analogue computer. It could be used to predict astronomy, astronomical ...
, believed to be an astronomical calculator. Further examples of fabulous works of art recovered from the sea floor are the two "bronzi" found in Riace (
Calabria Calabria is a Regions of Italy, region in Southern Italy. It is a peninsula bordered by the region Basilicata to the north, the Ionian Sea to the east, the Strait of Messina to the southwest, which separates it from Sicily, and the Tyrrhenian S ...
), Italy. In the cases of Antikythera and Riace, however, the artifacts were recovered without the direct participation of maritime archaeologists. Recent studies in the Sarno river (near
Pompeii Pompeii ( ; ) was a city in what is now the municipality of Pompei, near Naples, in the Campania region of Italy. Along with Herculaneum, Stabiae, and Villa Boscoreale, many surrounding villas, the city was buried under of volcanic ash and p ...
) show other interesting elements of ancient life. The Sarno projects suggests that on the Tyrrhenian shore there were little towns with palafittes, similar to ancient
Venice Venice ( ; ; , formerly ) is a city in northeastern Italy and the capital of the Veneto Regions of Italy, region. It is built on a group of 118 islands that are separated by expanses of open water and by canals; portions of the city are li ...
. In the same area, the submerged town of Puteoli ( Pozzuoli, close to
Naples Naples ( ; ; ) is the Regions of Italy, regional capital of Campania and the third-largest city of Italy, after Rome and Milan, with a population of 908,082 within the city's administrative limits as of 2025, while its Metropolitan City of N ...
) contains the "portus Julius" created by Marcus Vipsanius Agrippa in 37 BC, later sunk due to bradyseism. The sea floor elsewhere in the Mediterranean holds countless archaeological sites. In
Israel Israel, officially the State of Israel, is a country in West Asia. It Borders of Israel, shares borders with Lebanon to the north, Syria to the north-east, Jordan to the east, Egypt to the south-west, and the Mediterranean Sea to the west. Isr ...
,
Herod the Great Herod I or Herod the Great () was a History of the Jews in the Roman Empire, Roman Jewish client king of the Herodian kingdom of Judea. He is known for his colossal building projects throughout Judea. Among these works are the rebuilding of the ...
's port at
Caesarea Maritima Caesarea () also Caesarea Maritima, Caesarea Palaestinae or Caesarea Stratonis, was an ancient and medieval port city on the coast of the eastern Mediterranean, and later a small fishing village. It was the capital of Judaea (Roman province), ...
has been extensively studied. Other finds are consistent with some passages of the
Bible The Bible is a collection of religious texts that are central to Christianity and Judaism, and esteemed in other Abrahamic religions such as Islam. The Bible is an anthology (a compilation of texts of a variety of forms) originally writt ...
(like the so-called Jesus boat, which appears to have been in use during the first century AD).


Australia

Maritime archaeology in Australia commenced in the 1970s with the advent of Jeremy Green due to concerns expressed by academics and politicians with the rampant destruction of the Dutch and British East India ships lost on the west coast. As Commonwealth legislation was enacted and enforced after 1976 and as States enacted their own legislation the sub-discipline spread throughout Australia concentrating initially on shipwrecks due to on-going funding by both the States and the Commonwealth under their shipwreck legislation. Studies now include as an element of underwater archaeology, as a whole, the study of submerged indigenous sites. Nautical Archaeology, (the specialised study of boat and ship construction) is also practised in the region. Often the sites or relics studied in Australia as in the rest of the world are not inundated. The study of historic submerged aircraft, better known as a sub-discipline of aviation archaeology, underwater aviation archaeology is also practised in the region. In some states maritime and underwater archaeology is practised out of Museums and in others out of cultural heritage management units, and all practitioners operate under the aegis of the Australasian Institute for Maritime Archaeology (AIMA).Staniforth, M., & Nash, M., (eds.) Underwater Archaeology: Australian Approaches. Springer, NY


See also

* Australasian Underwater Cultural Heritage Database * Maritime archaeology of East Africa * Nautical Archaeology Society * Maritime Archaeology Trust * Lighthouse Archaeological Maritime Program (LAMP) * RPM Nautical Foundation * Sea Research Society * Institute of Nautical Archaeology * UNESCO Convention on the Protection of the Underwater Cultural Heritage


Submerged historic and pre-historic sites

* Bouldnor Cliff *
Alexandria Alexandria ( ; ) is the List of cities and towns in Egypt#Largest cities, second largest city in Egypt and the List of coastal settlements of the Mediterranean Sea, largest city on the Mediterranean coast. It lies at the western edge of the Nile ...
* Port Royal * Maritime Heritage Trail - Battle of Saipan * Interactive 3D model of an ancient Roman shipwreck found in Croatia


Coastal and foreshore archaeology

* Seahenge


Ships and boats

*
Antikythera Antikythera ( , ; , ) or Anticythera, known in antiquity as Aigilia (), is a Greek island lying on the edge of the Aegean Sea, between Crete and Peloponnese. Since the 2011 local government reform, it is part of the municipality of Kythira isl ...
c 80-50 BC, includes the astronomical computer, the
Antikythera mechanism The Antikythera mechanism ( , ) is an Ancient Greece, Ancient Greek hand-powered orrery (model of the Solar System). It is the oldest known example of an Analog computer, analogue computer. It could be used to predict astronomy, astronomical ...
* Cape Gelidonya – Late
Bronze Age The Bronze Age () was a historical period characterised principally by the use of bronze tools and the development of complex urban societies, as well as the adoption of writing in some areas. The Bronze Age is the middle principal period of ...
shipwreck, c. 1200 BC * City of Adelaide (1864) – 19th century clipper, Scotland *
North Ferriby North Ferriby is a village and civil parishes in England, civil parish in the Haltemprice area of the East Riding of Yorkshire, England. History Humber Estuary "The archaeology of the intertidal wetlands of the Humber Estuary is of internatio ...
– site of discovery of
Bronze Age The Bronze Age () was a historical period characterised principally by the use of bronze tools and the development of complex urban societies, as well as the adoption of writing in some areas. The Bronze Age is the middle principal period of ...
sewn plank boats dated by radiocarbon to between 1890 BC to 1700 BC * Belle shipwreck – French explorer La Salle's ship, lost in 1686 off Texas * Batavia shipwreck – Dutch East Indies ship, lost in 1629 off Western Australia * Hunley – the first submarine to sink an enemy ship, lost off Charleston, South Carolina, in 1864 * Half Moon (shipwreck) – A racing sailboat which sank in 1930 near Miami, Florida, United States - and one of the sites in the Florida Maritime Heritage Trail * Ma'agan Michael Ship – A 5th century BC boat discovered off the coast of Israel * Madrague de Giens c 75-60 BC, Roman merchantman sunk of the coast of La Madrague de Giens, east of
Toulon Toulon (, , ; , , ) is a city in the Provence-Alpes-Côte d'Azur region of southeastern France. Located on the French Riviera and the historical Provence, it is the prefecture of the Var (department), Var department. The Commune of Toulon h ...
* Nineteenth century boat discovered at Leamington Wharf, Union Canal * SS Xantho – Iron-hulled steamship, lost in 1872 off Western Australia. Its historic engine was raised in 1985 and can now be turned over by hand * Uluburun – Late
Bronze Age The Bronze Age () was a historical period characterised principally by the use of bronze tools and the development of complex urban societies, as well as the adoption of writing in some areas. The Bronze Age is the middle principal period of ...
shipwreck, 14th century BC * Condura Croatica – 11th century, port of Nin, Croatia * Queen Anne's Revenge – Blackbeard's flagship, 18th century frigate, Beaufort, NC.


References


External links

* UK resource, with access to information on more than 45,000 wrecks, mapped thematically for a wide variety of search criteria * (US) * (US) * * * Affiliated with Texas University * * Port Juliu
ULIXES la guida dei Campi Flegrei
at Puteoli {{Authority control Underwater archaeology Maritime history