In economics, cargo or freight refers to goods or produce being conveyed – for commercial gain – by water, air or land. Cargo was a shipload. Cargo now covers all types of freight, including that carried by train, truck, or intermodal container; the term cargo is used in case of goods in the cold-chain, because the perishable inventory is always in transit towards a final end-use when it is held in cold storage or other similar climate-controlled facility. Multi-modal container units, designed as reusable carriers to facilitate unit load handling of the goods contained, are referred to as cargo, specially by shipping lines and logistics operators. Aircraft ULD boxes are documented as cargo, with associated packing list of the items contained within; when empty containers are shipped each unit is documented as a cargo and when goods are stored within, the contents are termed as containerised cargo. Seaport terminals handle a wide range of maritime cargo. Automobiles are handled at many ports and are carried on specialized roll-on/roll-off ships.
Break bulk cargo is material stacked on pallets and lifted into and out of the hold of a vessel by cranes on the dock or aboard the ship itself. The volume of break bulk cargo has declined worldwide as containerization has grown. One way to secure break bulk and freight in intermodal containers is by using Dunnage Bags. Bulk cargo, such as salt, oil and scrap metal, is defined as commodities that are neither on pallets nor in containers. Bulk cargoes are not handled as individual pieces, the way heavy-lift and project cargoes are. Alumina, gypsum and wood chips, for instance, are bulk cargoes. Neo-bulk cargo comprises individual units that are counted as they are loaded and unloaded, in contrast to bulk cargo, not counted, but that are not containerized. Containers are the fastest growing cargo category at most ports worldwide. Containerized cargo includes everything from auto parts and manufacturing components to shoes and toys to frozen meat and seafood. Project cargo and the heavy lift cargo include items like manufacturing equipment, air conditioners, factory components, wind turbines, military equipment, any other oversized or overweight cargo, too big or too heavy to fit into a container.
Air cargo known as air freight, is collected by firms from shippers and delivered to customers. Aircraft were first used for carrying mail as cargo in 1911. Manufacturers started designing aircraft for other types of freight as well. There are many commercial aircraft suitable for carrying cargo such as the Boeing 747 and the bigger An‑124, purposely built for easy conversion into a cargo aircraft; such large aircraft employ quick-loading containers known as unit load devices, much like containerized cargo ships. The ULDs are located in the front section of the aircraft. Most nations own and utilize large numbers of military cargo aircraft such as the C‑17 Globemaster III for logistical needs. Popular commercial aircraft transformed to a cargo aircraft such as Saab 340A is designed for high revenue and profitability in short / medium haul operations. Trains are capable of transporting a large number of containers. Trains are used for the transportation of water, grain, steel and coal, they are used because they can carry a large amount and have a direct route to the destination.
Under the right circumstances, freight transport by rail is more economic and energy efficient than by road when carried in bulk or over long distances. The main disadvantage of rail freight is its lack of flexibility. For this reason, rail has lost much of the freight business to road transport. Rail freight is subject to transshipment costs, since it must be transferred from one mode of transportation to another. Practices such as containerization aim at minimizing these costs; when transporting point-to-point bulk loads such as cement or grain, with specialised bulk handling facilities at the rail sidings, rail mode of transport remains the most convenient and preferred option. Many governments are trying to encourage shippers to use trains more because of the environmental benefits. Many firms, like Parcelforce, R+L Carriers transport all types of cargo by road. Delivering everything from letters to houses to cargo containers, these firms offer fast, sometimes same-day, delivery. A good example of road cargo is food, as supermarkets require deliveries daily to replenish their shelves with goods.
Retailers and manufacturers of all kinds rely upon delivery trucks, be they full size semi trucks or smaller delivery vans. These smaller road haulage companies strive for the best routes and prices to ship out their products. Indeed, the level of commercial freight transported by smaller businesses is a good barometer of healthy economic development as it is these types of vehicles that move and transport anything, including couriers transporting parcel and mail. You can see the different weights of vehicles that are used to move cargo around. Freight is organized into various shipment categories before it is transported. An item's category is determined by: the type of item being carried. For example, a kettle could fit into the category'household goods'. How large the shipment is, in terms of both item size and quantity. How long the item for delivery will be in transit. Shipments are categorized as household goods, express and freight shipments: Household goods include furniture and similar items.
Small business or personal items like envelopes are considered overnight expres
Bulk cargo is commodity cargo, transported unpackaged in large quantities. It refers to material in either liquid or granular, particulate form, as a mass of small solids, such as petroleum/crude oil, coal, or gravel; this cargo is dropped or poured, with a spout or shovel bucket, into a bulk carrier ship's hold, railroad car/railway wagon, or tanker truck/trailer/semi-trailer body. Smaller quantities can be palletised. Bulk cargo is classified as dry; the Baltic Exchange is based in London and provides a range of indices benchmarking the cost of moving bulk commodities and wet, along popular routes around the seas. Some of these indices are used to settle Freight Futures, known as FFA's; the most famous of the Baltic indices is the Baltic Dry Indices called the BDI. This is a derived function of the Baltic Capesize index, Baltic Panamax index, Baltic Supramax index and the Baltic Handysize index; the BDI has been used as a bellwether for the global economy as it can be interpreted as an indicator of an increase or decrease in the amount of raw commodities countries are importing/exporting.
Bauxite Bulk minerals Cements Chemicals Coals and cokes Agricultural products such as dry edibles Grains Iron, etc. Wood chips Refrigerated goods Livestock and animal products Unitised goods Wheeled and heavy units Hazardous chemicals Petroleum Gasoline Liquefied natural gas Liquid nitrogen Port of Port Hedland, Australia Port of Rotterdam Port of Vancouver Port of Liverpool Port of Tyne Port of Amsterdam Port of Hamilton Bliault, Charles. Bulk Cargoes: A Guide to Good Practice. UK: The North of England P&I Association. P. 280. ISBN 978-0-9574936-3-6. ASIN 0957493630. George, William. Stability and Trim for the Ship's Officer. Centreville, MD: Cornell Maritime Press. ISBN 978-0-87033-564-8. Hayler, William B.. American Merchant Seaman's Manual. Cornell Maritime Pr. ISBN 0-87033-549-9. United Nations Conference on Trade and Development. Review of Maritime Transport, 2006. New York and Geneva: United Nations. United Nations Conference on Trade and Development. Review of Maritime Transport, 2007. New York and Geneva: United Nations
Rail transport is a means of transferring of passengers and goods on wheeled vehicles running on rails known as tracks. It is commonly referred to as train transport. In contrast to road transport, where vehicles run on a prepared flat surface, rail vehicles are directionally guided by the tracks on which they run. Tracks consist of steel rails, installed on ties and ballast, on which the rolling stock fitted with metal wheels, moves. Other variations are possible, such as slab track, where the rails are fastened to a concrete foundation resting on a prepared subsurface. Rolling stock in a rail transport system encounters lower frictional resistance than road vehicles, so passenger and freight cars can be coupled into longer trains; the operation is carried out by a railway company, providing transport between train stations or freight customer facilities. Power is provided by locomotives which either draw electric power from a railway electrification system or produce their own power by diesel engines.
Most tracks are accompanied by a signalling system. Railways are a safe land transport system. Railway transport is capable of high levels of passenger and cargo utilization and energy efficiency, but is less flexible and more capital-intensive than road transport, when lower traffic levels are considered; the oldest known, man/animal-hauled railways date back to the 6th century BC in Greece. Rail transport commenced in mid 16th century in Germany in the form of horse-powered funiculars and wagonways. Modern rail transport commenced with the British development of the steam locomotives in the early 19th century, thus the railway system in Great Britain is the oldest in the world. Built by George Stephenson and his son Robert's company Robert Stephenson and Company, the Locomotion No. 1 is the first steam locomotive to carry passengers on a public rail line, the Stockton and Darlington Railway in 1825. George Stephenson built the first public inter-city railway line in the world to use only the steam locomotives all the time, the Liverpool and Manchester Railway which opened in 1830.
With steam engines, one could construct mainline railways, which were a key component of the Industrial Revolution. Railways reduced the costs of shipping, allowed for fewer lost goods, compared with water transport, which faced occasional sinking of ships; the change from canals to railways allowed for "national markets" in which prices varied little from city to city. The spread of the railway network and the use of railway timetables, led to the standardisation of time in Britain based on Greenwich Mean Time. Prior to this, major towns and cities varied their local time relative to GMT; the invention and development of the railway in the United Kingdom was one of the most important technological inventions of the 19th century. The world's first underground railway, the Metropolitan Railway, opened in 1863. In the 1880s, electrified trains were introduced, leading to electrification of tramways and rapid transit systems. Starting during the 1940s, the non-electrified railways in most countries had their steam locomotives replaced by diesel-electric locomotives, with the process being complete by the 2000s.
During the 1960s, electrified high-speed railway systems were introduced in Japan and in some other countries. Many countries are in the process of replacing diesel locomotives with electric locomotives due to environmental concerns, a notable example being Switzerland, which has electrified its network. Other forms of guided ground transport outside the traditional railway definitions, such as monorail or maglev, have been tried but have seen limited use. Following a decline after World War II due to competition from cars, rail transport has had a revival in recent decades due to road congestion and rising fuel prices, as well as governments investing in rail as a means of reducing CO2 emissions in the context of concerns about global warming; the history of rail transport began in the 6th century BC in Ancient Greece. It can be divided up into several discrete periods defined by the principal means of track material and motive power used. Evidence indicates that there was 6 to 8.5 km long Diolkos paved trackway, which transported boats across the Isthmus of Corinth in Greece from around 600 BC.
Wheeled vehicles pulled by men and animals ran in grooves in limestone, which provided the track element, preventing the wagons from leaving the intended route. The Diolkos was in use for over 650 years, until at least the 1st century AD; the paved trackways were later built in Roman Egypt. In 1515, Cardinal Matthäus Lang wrote a description of the Reisszug, a funicular railway at the Hohensalzburg Fortress in Austria; the line used wooden rails and a hemp haulage rope and was operated by human or animal power, through a treadwheel. The line still exists and is operational, although in updated form and is the oldest operational railway. Wagonways using wooden rails, hauled by horses, started appearing in the 1550s to facilitate the transport of ore tubs to and from mines, soon became popular in Europe; such an operation was illustrated in Germany in 1556 by Georgius Agricola in his work De re metallica. This line used "Hund" carts with unflanged wheels running on wooden planks and a vertical pin on the truck fitting into the gap between the planks to keep it going the right way.
The miners called the wagons Hunde from the noise. There are many references to their use in central Europe in the 16th century; such a transport system was used by German miners at Cal
In organic chemistry, a hydrocarbon is an organic compound consisting of hydrogen and carbon. Hydrocarbons are examples of group 14 hydrides. Hydrocarbons from which one hydrogen atom has been removed are functional groups called hydrocarbyls; because carbon has 4 electrons in its outermost shell carbon has four bonds to make, is only stable if all 4 of these bonds are used. Aromatic hydrocarbons, alkanes and alkyne-based compounds are different types of hydrocarbons. Most hydrocarbons found on Earth occur in crude oil, where decomposed organic matter provides an abundance of carbon and hydrogen which, when bonded, can catenate to form limitless chains; as defined by IUPAC nomenclature of organic chemistry, the classifications for hydrocarbons are: Saturated hydrocarbons are the simplest of the hydrocarbon species. They are composed of single bonds and are saturated with hydrogen; the formula for acyclic saturated hydrocarbons is CnH2n+2. The most general form of saturated hydrocarbons is CnH2n +2.
Those with one ring are the cycloalkanes. Saturated hydrocarbons are the basis of petroleum fuels and are found as either linear or branched species. Substitution reaction is their characteristics property. Hydrocarbons with the same molecular formula but different structural formulae are called structural isomers; as given in the example of 3-methylhexane and its higher homologues, branched hydrocarbons can be chiral. Chiral saturated hydrocarbons constitute the side chains of biomolecules such as chlorophyll and tocopherol. Unsaturated hydrocarbons have one or more triple bonds between carbon atoms; those with double bond are called alkenes. Those with one double bond have the formula CnH2n; those containing triple bonds are called alkyne. Those with one triple bond have the formula CnH2n−2. Aromatic hydrocarbons known as arenes, are hydrocarbons that have at least one aromatic ring. Hydrocarbons can be gases, waxes or low melting solids or polymers; because of differences in molecular structure, the empirical formula remains different between hydrocarbons.
This inherent ability of hydrocarbons to bond to themselves is known as catenation, allows hydrocarbons to form more complex molecules, such as cyclohexane, in rarer cases, arenes such as benzene. This ability comes from the fact that the bond character between carbon atoms is non-polar, in that the distribution of electrons between the two elements is somewhat due to the same electronegativity values of the elements, does not result in the formation of an electrophile. With catenation comes the loss of the total amount of bonded hydrocarbons and an increase in the amount of energy required for bond cleavage due to strain exerted upon the molecule. In simple chemistry, as per valence bond theory, the carbon atom must follow the 4-hydrogen rule, which states that the maximum number of atoms available to bond with carbon is equal to the number of electrons that are attracted into the outer shell of carbon. In terms of shells, carbon consists of an incomplete outer shell, which comprises 4 electrons, thus has 4 electrons available for covalent or dative bonding.
Hydrocarbons are hydrophobic like lipids. Some hydrocarbons are abundant in the solar system. Lakes of liquid methane and ethane have been found on Titan, Saturn's largest moon, confirmed by the Cassini-Huygens Mission. Hydrocarbons are abundant in nebulae forming polycyclic aromatic hydrocarbon compounds. Hydrocarbons are a primary energy source for current civilizations; the predominant use of hydrocarbons is as a combustible fuel source. In their solid form, hydrocarbons take the form of asphalt. Mixtures of volatile hydrocarbons are now used in preference to the chlorofluorocarbons as a propellant for aerosol sprays, due to chlorofluorocarbons' impact on the ozone layer. Methane and ethane are gaseous at ambient temperatures and cannot be liquefied by pressure alone. Propane is however liquefied, exists in'propane bottles' as a liquid. Butane is so liquefied that it provides a safe, volatile fuel for small pocket lighters. Pentane is a colorless liquid at room temperature used in chemistry and industry as a powerful nearly odorless solvent of waxes and high molecular weight organic compounds, including greases.
Hexane is a used non-polar, non-aromatic solvent, as well as a significant fraction of common gasoline. The C6 through C10 alkanes and isomeric cycloalkanes are the top components of gasoline, jet fuel and specialized industrial solvent mixtures. With the progressive addition of carbon units, the simple non-ring structured hydrocarbons have higher viscosities, lubricating indices, boiling points, solidification temperatures, deeper color. At the opposite extreme from methane lie the heavy tars that remain as the lowest fraction in a crude oil refining retort, they are collected and utilized as roofing comp
The Irish Sea separates the islands of Ireland and Great Britain. Anglesey, Wales, is the largest island in the Irish Sea; the second in size is the Isle of Man and the sea may but be referred to as the Manx Sea. The Irish Sea is of significant economic importance to regional trade and transport, power generation in the form of wind power and nuclear power plants. Annual traffic between Great Britain and Ireland amounts to over 12 million passengers and 17 million tonnes of traded goods; the Irish Sea is connected to the North Atlantic at both its southern ends. To the north, the connection is through the North Channel between Scotland and Northern Ireland and the Malin Sea; the southern end is linked to the Atlantic through the St George's Channel between Ireland and Pembrokeshire, the Celtic Sea. It is composed of a deeper channel about 190 miles long and 20–30 miles wide on its western side and shallower bays to the east; the western channel's depth ranges from 80 metres up to 275 m in the Beaufort's Dyke in the North Channel.
Cardigan Bay in the south, the waters to the east of the Isle of Man, are less than 50 m deep. With a total water volume of 2,430 km3 and a surface area of 47,000 km2, 80% is to the west of the Isle of Man; the largest sandbanks are the Bahama and King William Banks to the east and north of the Isle of Man and the Kish Bank, Codling Bank, Arklow Bank and Blackwater Bank near the coast of Ireland. The Irish Sea, at its greatest width, narrows to 47 miles; the International Hydrographic Organization defines the limits of the Irish Sea as follows, On the North. The Southern limit of the Inner Seas off the West Coast of Scotland, defined as a line joining the South extreme of the Mull of Galloway in Scotland and Ballyquintin Point in Northern Ireland. On the South. A line joining St. David's Head in Wales to Carnsore Point in Ireland; the Irish Sea has undergone a series of dramatic changes over the last 20,000 years as the last glacial period ended and was replaced by warmer conditions. At the height of the glaciation, the central part of the modern sea was a long freshwater lake.
As the ice retreated 10,000 years ago, the lake reconnected to the sea. Ireland has no bridge connection to Great Britain. Northern Ireland ports handle 10 million tonnes of goods trade with the rest of the United Kingdom annually; the Port of Liverpool handles 734 thousand passengers a year. Holyhead port handles most of the passenger traffic from Dublin and Dún Laoghaire ports, as well as 3.3 million tonnes of freight. Ports in the Republic handle 3,600,000 travellers crossing the sea each year, amounting to 92% of all Irish Sea travel. Ferry connections from Wales to Ireland across the Irish Sea include Fishguard Harbour and Pembroke to Rosslare, Holyhead to Dún Laoghaire and Holyhead to Dublin. From Scotland, Cairnryan connects with both Larne. There is a connection between Liverpool and Belfast via the Isle of Man or direct from Birkenhead; the world's largest car ferry, Ulysses, is operated by Irish Ferries on the Dublin Port–Holyhead route. "Irish Sea" is the name of one of the BBC's Shipping Forecast areas defined by the coordinates: 54°50′N 05°05′W 54°45′N 05°45′W 52°30′N 06°15′W 52°00′N 05°05′WTransport for Wales Rail, Iarnród Éireann, Irish Ferries, Stena Line, Northern Ireland Railways, Stena Line and Abellio ScotRail promote SailRail with through rail tickets for the train and the ferry.
The Caernarfon Bay basin contains up to 7 cubic kilometres of Permian and Triassic syn-rift sediments in an asymmetrical graben, bounded to the north and south by Lower Paleozoic massifs. Only two exploration wells have been drilled so far, there remain numerous undrilled targets in tilted fault block plays; as in the East Irish Sea Basin, the principal target reservoir is the Lower Triassic, Sherwood Sandstone, top-sealed by younger Triassic mudstones and evaporites. Wells in the Irish Sector to the west have demonstrated that pre-rift, Westphalian coal measures are excellent hydrocarbon source rocks, are at peak maturity for gas generation. Seismic profiles image these strata continuing beneath a basal Permian unconformity into at least the western part of the Caernarfon Bay Basin; the timing of gas generation presents the greatest exploration risk. Maximum burial of, primary gas migration from, the source rocks could have terminated as early as the Jurassic, whereas many of the tilted fault blocks were reactivated or created during Paleogene inversion of the basin.
However, it is possible that a secondary gas charge occurred during regional heating associated with intrusion of Paleogene dykes, such as those that crop out nearby on the coastline of north Wales. (Floodpage et al
Horn of Africa
The Horn of Africa is a peninsula in Northeast Africa. It extends hundreds of kilometers into the Arabian Sea and lies along the southern side of the Gulf of Aden; the area is the easternmost projection of the African continent. Referred to in ancient and medieval times as the land of the Barbara and Habesha, the Horn of Africa denotes the region containing the countries of Djibouti, Eritrea and Somalia, it covers 2 million km2 and is inhabited by 115 million people. Regional studies on the Horn of Africa are carried out, among others, in the fields of Ethiopian Studies as well as Somali Studies; this peninsula is known by various names. In ancient and medieval times, the Horn of Africa was referred to as the Bilad al Barbar, it is known as the Somali peninsula, or in the Somali language, Geeska Afrika, Jasiiradda Soomaali or Gacandhulka Soomaali. In other languages that are local or adjacent to the Horn of Africa, it is known as የአፍሪካ ቀንድ yäafrika qänd in Amharic, القرن الأفريقي al-qarn al-'afrīqī in Arabic, Gaaffaa Afriikaa in Oromo and ቀርኒ ኣፍሪቃ in Tigrinya.
The Horn of Africa is sometimes shortened to HOA. The Horn of Africa is quite designated the "Horn", while inhabitants are sometimes colloquially referred to as Horn Africans. Sometimes the term Greater Horn of Africa is used, either to be inclusive of neighbouring northeast African countries, or to distinguish the broader geopolitical definition of the Horn of Africa from narrower peninsular definitions. Ancient Greeks and Romans referred to the Somali peninsula as Regio Aromatica or Regio Cinnamonifora due to the aromatic plants, or Regio Incognita owing to its unchartered territory. Shell middens 125,000 years old have been found in Eritrea, indicating the diet of early humans included seafood obtained by beachcombing. According to both genetic and fossil evidence, archaic Homo sapiens evolved into anatomically modern humans in the Horn of Africa between 200,000 and 100,000 years ago and have dispersed from the Horn of Africa; the recognition of Homo sapien idaltu and Omo Kibish as anatomically modern humans would justify the description of contemporary humans with the subspecies name Homo sapiens sapiens.
Because of their early dating and unique physical characteristics idaltu and kibish represent the immediate ancestors of anatomically modern humans as suggested by the Out-of-Africa theory. Today at the Bab-el-Mandeb straits, the Red Sea is about 12 miles wide, but 50,000 years ago it was much narrower and sea levels were 70 meters lower. Though the straits were never closed, there may have been islands in between which could be reached using simple rafts. According to linguists, the Horn of Africa is the original homeland of the proto-Afroasiatic language as it is considered the region the Afroasiatic language family displays the greatest diversity, a sign viewed to represent a geographic origin; the Horn of Africa is the place where the haplogroup E1b1b originated from, Christopher Ehret and Shomarka Keita have suggested that the geography of the E1b1b lineage coincides with the distribution of the Afroasiatic languages. Genetic analysis done on the Afroasiatic speaking population further found that a pre-agricultural back-to-Africa migration into the Horn of Africa occurred through Egypt 23,000 years ago and it brought a non-African ancestry dubbed Ethio-Somali in the region.
Together with northern Somalia, the Red Sea coast of Sudan and Eritrea is considered the most location of the land known to the ancient Egyptians as Punt, whose first mention dates to the 25th century BCE. Dʿmt was a kingdom located in Eritrea and northern Ethiopia, which existed during the 8th and 7th centuries BCE. With its capital at Yeha, the kingdom developed irrigation schemes, used plows, grew millet, made iron tools and weapons. After the fall of Dʿmt in the 5th century BCE, the plateau came to be dominated by smaller successor kingdoms, until the rise of one of these kingdoms during the 1st century, the Aksumite Kingdom, able to reunite the area; the Kingdom of Aksum was an ancient state located in the Eritrean highlands and Ethiopian highlands, which thrived between the 1st and 7th centuries CE. A major player in the commerce between the Roman Empire and Ancient India, Aksum's rulers facilitated trade by minting their own currency; the state established its hegemony over the declining Kingdom of Kush and entered the politics of the kingdoms on the Arabian peninsula extending its rule over the region with the conquest of the Himyarite Kingdom.
Under Ezana, the kingdom of Aksum became the first major empire to adopt Christianity, was named by Mani as one of the four great powers of his time, along with Persia and China. Northern Somalia was an important link in the Horn, connecting the region's commerce with the rest of the ancient world. Somali sailors and merchants were the main suppliers of frankincense and spices, all of which were valuable luxuries to the Ancient Egyptians, Mycenaeans and Romans; the Romans began to refer to the region as Regio Aromatica. In the classical era, several flourishing Somali city-states such as Opone and Malao competed with the Sabaeans and Axumites for the rich Indo-Greco-Roman trade; the birth of Islam opposite the Horn's Red Sea co
A ship is a large watercraft that travels the world's oceans and other sufficiently deep waterways, carrying passengers or goods, or in support of specialized missions, such as defense and fishing. A "ship" was a sailing vessel with at least three square-rigged masts and a full bowsprit. Ships are distinguished from boats, based on size, load capacity, tradition. Ships have been important contributors to human commerce, they have supported the spread of colonization and the slave trade, but have served scientific and humanitarian needs. After the 15th century, new crops that had come from and to the Americas via the European seafarers contributed to the world population growth. Ship transport is responsible for the largest portion of world commerce; as of 2016, there were more than 49,000 merchant ships, totaling 1.8 billion dead weight tons. Of these 28% were oil tankers, 43% were bulk carriers, 13% were container ships. Ships are larger than boats, but there is no universally accepted distinction between the two.
Ships can remain at sea for longer periods of time than boats. A legal definition of ship from Indian case law is a vessel. A common notion is, but not vice versa. A US Navy rule of thumb is that ships heel towards the outside of a sharp turn, whereas boats heel towards the inside because of the relative location of the center of mass versus the center of buoyancy. American and British 19th Century maritime law distinguished "vessels" from other craft. In the Age of Sail, a full-rigged ship was a sailing vessel with at least three square-rigged masts and a full bowsprit. A number of large vessels are referred to as boats. Submarines are a prime example. Other types of large vessel which are traditionally called boats are Great Lakes freighters and ferryboats. Though large enough to carry their own boats and heavy cargoes, these vessels are designed for operation on inland or protected coastal waters. In most maritime traditions ships have individual names, modern ships may belong to a ship class named after its first ship.
In the northern parts of Europe and America a ship is traditionally referred to with a female grammatical gender, represented in English with the pronoun "she" if named after a man. This is not universal usage and some English language journalistic style guides advise using "it" as referring to ships with female pronouns can be seen as offensive and outdated. In many documents the ship name is introduced with a ship prefix being an abbreviation of the ship class, for example "MS" or "SV", making it easier to distinguish a ship name from other individual names in a text; the first known vessels could not be described as ships. The first navigators began to use animal skins or woven fabrics as sails. Affixed to the top of a pole set upright in a boat, these sails gave early ships range; this allowed men to explore allowing for the settlement of Oceania for example. By around 3000 BC, Ancient Egyptians knew, they used woven straps to lash the planks together, reeds or grass stuffed between the planks helped to seal the seams.
The Greek historian and geographer Agatharchides had documented ship-faring among the early Egyptians: "During the prosperous period of the Old Kingdom, between the 30th and 25th centuries BC, the river-routes were kept in order, Egyptian ships sailed the Red Sea as far as the myrrh-country." Sneferu's ancient cedar wood ship Praise of the Two Lands is the first reference recorded to a ship being referred to by name. The ancient Egyptians were at ease building sailboats. A remarkable example of their shipbuilding skills was the Khufu ship, a vessel 143 feet in length entombed at the foot of the Great Pyramid of Giza around 2500 BC and found intact in 1954, it is known that ancient Nubia/Axum traded with India, there is evidence that ships from Northeast Africa may have sailed back and forth between India/Sri Lanka and Nubia trading goods and to Persia and Rome. Aksum was known by the Greeks for having seaports for ships from Yemen. Elsewhere in Northeast Africa, the Periplus of the Red Sea reports that Somalis, through their northern ports such as Zeila and Berbera, were trading frankincense and other items with the inhabitants of the Arabian Peninsula well before the arrival of Islam as well as with Roman-controlled Egypt.
A panel found at Mohenjodaro depicted a sailing craft. Vessels were of many types; this treatise gives a technical exposition on the techniques of shipbuilding. It sets forth minute details about the various types of ships, their sizes, the materials from which they were built; the Yukti Kalpa Taru sums up in a condensed form all the available information. The Yukti Kalpa Taru gives sufficient information and dates to prove that, in ancient times, Indian shipbuilders had a good knowledge of the materials which were used in building ships. In addition to describing the qualities of the different types of wood and their suitability for shipbuilding, the Yukti Kalpa Taru gives an elaborate classification of ships based on their size; the oldest discovered sea faring hulled boat is the Late Bronze Age Uluburun shipwreck off the coast of Turkey, dating back to 1300 BC. The Phoenicians, the first to sail around