1.
Turkey
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Turkey, officially the Republic of Turkey, is a transcontinental country in Eurasia, mainly in Anatolia in Western Asia, with a smaller portion on the Balkan peninsula in Southeast Europe. Turkey is a democratic, secular, unitary, parliamentary republic with a cultural heritage. The country is encircled by seas on three sides, the Aegean Sea is to the west, the Black Sea to the north, and the Mediterranean Sea to the south. The Bosphorus, the Sea of Marmara, and the Dardanelles, Ankara is the capital while Istanbul is the countrys largest city and main cultural and commercial centre. Approximately 70-80% of the countrys citizens identify themselves as ethnic Turks, other ethnic groups include legally recognised and unrecognised minorities. Kurds are the largest ethnic minority group, making up approximately 20% of the population, the area of Turkey has been inhabited since the Paleolithic by various ancient Anatolian civilisations, as well as Assyrians, Greeks, Thracians, Phrygians, Urartians and Armenians. After Alexander the Greats conquest, the area was Hellenized, a process continued under the Roman Empire. The Seljuk Sultanate of Rûm ruled Anatolia until the Mongol invasion in 1243, the empire reached the peak of its power in the 16th century, especially during the reign of Suleiman the Magnificent. During the war, the Ottoman government committed genocides against its Armenian, Assyrian, following the war, the conglomeration of territories and peoples that formerly comprised the Ottoman Empire was partitioned into several new states. Turkey is a member of the UN, an early member of NATO. Turkeys growing economy and diplomatic initiatives have led to its recognition as a regional power while her location has given it geopolitical, the name of Turkey is based on the ethnonym Türk. The first recorded use of the term Türk or Türük as an autonym is contained in the Old Turkic inscriptions of the Göktürks of Central Asia, the English name Turkey first appeared in the late 14th century and is derived from Medieval Latin Turchia. Similarly, the medieval Khazar Empire, a Turkic state on the shores of the Black. The medieval Arabs referred to the Mamluk Sultanate as al-Dawla al-Turkiyya, the Ottoman Empire was sometimes referred to as Turkey or the Turkish Empire among its European contemporaries. The Anatolian peninsula, comprising most of modern Turkey, is one of the oldest permanently settled regions in the world, various ancient Anatolian populations have lived in Anatolia, from at least the Neolithic period until the Hellenistic period. Many of these peoples spoke the Anatolian languages, a branch of the larger Indo-European language family, in fact, given the antiquity of the Indo-European Hittite and Luwian languages, some scholars have proposed Anatolia as the hypothetical centre from which the Indo-European languages radiated. The European part of Turkey, called Eastern Thrace, has also been inhabited since at least forty years ago. It is the largest and best-preserved Neolithic site found to date, the settlement of Troy started in the Neolithic Age and continued into the Iron Age
2.
Istanbul
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Istanbul, historically known as Constantinople and Byzantium, is the most populous city in Turkey and the countrys economic, cultural, and historic center. Istanbul is a city in Eurasia, straddling the Bosphorus strait between the Sea of Marmara and the Black Sea. Its commercial and historical center lies on the European side and about a third of its population lives on the Asian side, the city is the administrative center of the Istanbul Metropolitan Municipality, both hosting a population of around 14.7 million residents. Istanbul is one of the worlds most populous cities and ranks as the worlds 7th-largest city proper, founded under the name of Byzantion on the Sarayburnu promontory around 660 BCE, the city developed to become one of the most significant in history. After its reestablishment as Constantinople in 330 CE, it served as a capital for almost 16 centuries, during the Roman and Byzantine, the Latin. Overlooked for the new capital Ankara during the period, the city has since regained much of its prominence. The population of the city has increased tenfold since the 1950s, as migrants from across Anatolia have moved in, arts, music, film, and cultural festivals were established at the end of the 20th century and continue to be hosted by the city today. Infrastructure improvements have produced a complex transportation network, considered a global city, Istanbul has one of the fastest-growing metropolitan economies in the world. It hosts the headquarters of many Turkish companies and media outlets and accounts for more than a quarter of the gross domestic product. Hoping to capitalize on its revitalization and rapid expansion, Istanbul has bid for the Summer Olympics five times in twenty years, the first known name of the city is Byzantium, the name given to it at its foundation by Megarean colonists around 660 BCE. The name is thought to be derived from a personal name, ancient Greek tradition refers to a legendary king of that name as the leader of the Greek colonists. Modern scholars have hypothesized that the name of Byzas was of local Thracian or Illyrian origin. He also attempted to promote the name Nova Roma and its Greek version Νέα Ῥώμη Nea Romē, the use of Constantinople to refer to the city during the Ottoman period is now considered politically incorrect, even if not historically inaccurate, by Turks. By the 19th century, the city had acquired other names used by foreigners or Turks. Europeans used Constantinople to refer to the whole of the city, pera was used to describe the area between the Golden Horn and the Bosphorus, but Turks also used the name Beyoğlu. The name İstanbul is commonly held to derive from the Medieval Greek phrase εἰς τὴν Πόλιν and this reflected its status as the only major city in the vicinity. The importance of Constantinople in the Ottoman world was reflected by its Ottoman name Der Saadet meaning the gate to Prosperity in Ottoman. An alternative view is that the name evolved directly from the name Constantinople, with the first, a Turkish folk etymology traces the name to Islam bol plenty of Islam because the city was called Islambol or Islambul as the capital of the Islamic Ottoman Empire
3.
Turkish State Railways
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The State Railways of the Turkish Republic or TCDD is the government-owned national railway carrier in the Republic of Turkey, headquartered in Ankara. The Turkish State Railways own and operate all railways in Turkey. In 2011, TCDD controlled 12,000 km of railways, in 2014, TCDD carried 78 million passengers and 26 million tons of freight. In 2009, the Turkish State Railways employed 25,593 people, the Turkish State Railways also owns a number of other rail transport companies in Turkey, such as Marmaray and İZBAN. TCDD is a member of InterRail since 1994, after World War I and the Turkish Independence War, the Republic of Turkey was a new-formed country. Even though Turkey had a network, most of it was operated by foreign companies. The State Railways of the Republic of Turkey was formed on 31 May 1927, TCDD now had rail lines to the cities İstanbul, İzmit, Ankara, Afyon, Adapazarı and Konya. On 1 January 1929, TCDD took over the line from Mersin to Adana. Apart from taking over already built lines, TCDD needed to build more line because many important cities were not serviced by rail. In 1926, TCDD started to build a line east to Sivas, reaching Kayseri in 1927. With most of the railways in Turkey under TCDD control, TCDD connected lines such as Kütahya with Balıkesir in 1932, in 1932 TCDD completed the railway to Samsun heading north at Sivas. TCDD continued to build lines, reaching Zonguldak, Erzurum, Erzincan, Diyarbakır, World War II broke out in 1938, slowing down the building. Between 1938 and 1996 TCDD building decreased, the railway only extended to Gaziantep and Van. In 1948 the State Railways released a plan of railway lines that were to be constructed to ensure national progression, the plan included 5,538 km of new railway lines that only 96 km were actually completed, the Gaziantep-Karkamış section of the Narlı-Nusaybin railway was completed in 1960. The Turkish State Railways operate most trains in the country, Intercity, regional, suburban, freight and most industrial lines are owned and operated by the State Railways. The only other railways in Turkey include İZBAN which operates rail service around İzmir. In addition to services, TCDD has been responsible since 1927 for operating several major ports which handle 30% of Turkish port activities. The Turkish State Railways operate passenger services on 90% of their system and these are intercity, regional, commuter and international services
4.
Port
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A port is a location on a coast or shore containing one or more harbors where ships can dock and transfer people or cargo to or from land. Port locations are selected to optimize access to land and navigable water, for commercial demand, Ports with deeper water are rarer, but can handle larger ships. Since ports throughout history handled every kind of traffic, support and storage facilities vary widely, may extend for miles, some ports have an important military role. One of the worlds oldest known artificial harbors is at Wadi al-Jarf on the Red Sea, along with the finding of harbor structures, ancient anchors have also been found. Guangzhou was an important port during the ancient times as far back as the Qin Dynasty, canopus was the principal port in Egypt for Greek trade before the foundation of Alexandria. Athens port of Piraeus was the base for the Athenian fleet, lothal is one of the most prominent cities of the ancient Indus valley civilisation, located in the Bhāl region of the modern state of Gujarāt and dating from 3700 BCE. Ostia Antica was the port of ancient Rome with Portus established by Claudius, Ports often have cargo-handling equipment, such as cranes and forklifts for use in loading ships, which may be provided by private interests or public bodies. Often, canneries or other processing facilities will be located nearby, some ports feature canals, which allow ships further movement inland. Access to intermodal transportation, such as railroads and highways, is critical to a port, so that passengers, Ports with international traffic have customs facilities. Harbor pilots and tugboats may maneuver large ships in tight quarters when near docks, the terms port and seaport are used for different types of port facilities that handle ocean-going vessels, and river port is used for river traffic, such as barges and other shallow-draft vessels. An inland port is a port on a lake, river, or canal with access to a sea or ocean. An example of this is the St. Lawrence Seaway which allows ships to travel from the Atlantic Ocean several thousand kilometers inland to Great Lakes ports like Duluth-Superior, a fishing port is a port or harbor for landing and distributing fish. It may be a facility, but it is usually commercial. A fishing port is the port that depends on an ocean product. In recent decades, regulations to save fishing stock may limit the use of a fishing port, a dry port is an inland intermodal terminal directly connected by road or rail to a seaport and operating as a centre for the transshipment of sea cargo to inland destinations. A warm-water port is one where the water does not freeze in wintertime, because they are available year-round, warm-water ports can be of great geopolitical or economic interest. A seaport is further categorized as a port or a cargo port. Additionally, cruise ports are known as a home port or a port of call
5.
Roll-on/roll-off
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This is in contrast to lift-on/lift-off vessels, which use a crane to load and unload cargo. RORO vessels have either built-in or shore-based ramps that allow the cargo to be rolled on. While smaller ferries that operate across rivers and other short distances often have built-in ramps, the ramps and doors may be located in stern, bow or sides, or any combination thereof. At first, wheeled vehicles carried as cargo on oceangoing ships were treated like any other cargo, automobiles had their fuel tanks emptied and their batteries disconnected before being hoisted into the ship’s hold, where they were chocked and secured. This process was tedious and difficult, and vehicles were subject to damage, an early roll-on/roll-off service was a train ferry, started in 1833 by the Monkland and Kirkintilloch Railway, which operated a wagon ferry on the Forth and Clyde Canal in Scotland. The first modern train ferry was Leviathan, built in 1849, the Edinburgh, Leith and Newhaven Railway was formed in 1842 and the company wished to extend the East Coast Main Line further north to Dundee and Aberdeen. The company hired the civil engineer Thomas Bouch who argued for a train ferry with an efficient roll-on/roll-off mechanism to maximise the efficiency of the system. Custom-built ferries were to be built, with lines and matching harbour facilities at both ends to allow the rolling stock to easily drive on and off the boat. To compensate for the tides, adjustable ramps were positioned at the harbours. The wagons were loaded on and off with the use of steam engines. ”The company was persuaded to install this train ferry service for the transportation of goods wagons across the Firth of Forth from Burntisland in Fife to Granton. The ferry itself was built by Thomas Grainger, a partner of the firm Grainger and Miller, the service commenced on 3 February 1850. Train-ferry services were used extensively during World War I and this involved three train-ferries to be built, each with four sets of railway line on the main deck to allow for up to 54 railway wagons to be shunted directly on and off the ferry. These train-ferries could also be used to transport vehicles along with railway rolling stock. Later that month a second train-ferry was established from the Port of Southampton on the South East Coast, in the first month of operations at Richborough,5,000 tons were transported across the Channel, by the end of 1918 it was nearly 261,000 tons. There were many advantages of the use of train-ferries over conventional shipping in World War I and it was much easier to move the large, heavy artillery and tanks that this kind of modern warfare required using train-ferries as opposed to repeated loading and unloading of cargo. The increase of traffic because of the war effort meant that economies. After the signing of the Armistice on 11 November 1918, train ferries were used extensively for the return of material from the Front, indeed, according to war office statistics, a greater tonnage of material was transported by train ferry from Richborough in 1919 than in 1918. As the train ferries had space for motor transport as well as rolling stock, thousands of lorries, motor cars
6.
Bosphorus
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The Bosphorus or Bosporus is a narrow, natural strait and an internationally significant waterway located in northwestern Turkey. It forms part of the boundary between Europe and Asia, and separates Asian Turkey from European Turkey. The worlds narrowest strait used for navigation, the Bosphorus connects the Black Sea with the Sea of Marmara, and, by extension via the Dardanelles. Most of the shores of the strait are heavily settled, straddled by the city of Istanbuls metropolitan population of 17 million inhabitants extending inland from both coasts, together with the Dardanelles, the Bosphorus forms the Turkish Straits. This folk etymology was canonized by Aeschylus in Prometheus Bound, where Prometheus prophesies to Io that the strait would be named after her, the site where Io supposedly went ashore was near Chrysopolis, and was named Bous the Cow. The same site was known as Damalis, as it was where the Athenian general Chares had erected a monument to his wife Damalis. Historically, the Bosphorus was also known as the Strait of Constantinople, or the Thracian Bosphorus and these are expressed in Herodotus Histories,4.83, as Bosporus Thracius, Bosporus Thraciae, and Βόσπορος Θρᾴκιος, respectively. Other names by which the strait is referenced by Herodotus include Chalcedonian Bosporus, the term eventually came to be used as common noun βόσπορος, meaning a strait, and was also formerly applied to the Hellespont in Classical Greek by Aeschylus and Sophocles. Presently, the waterway is officially referred to as simply Bosphorus, the Marmara further connects to the Aegean and Mediterranean Seas via the Dardanelles. A common mistake made by those who are unfamiliar with the locale is to assume the Bosphorus is a river, when it is, in fact. The exact scientific cause and date of the formation of the Bosphorus remain the subject of debate among geologists, many geologists, however, claim that the strait is much older, even if relatively young on a geologic timescale. The Symplegades were defeated when the lyrical hero Jason obtained successful passage, whereupon the rocks became fixed, between these limits, the strait is 31 km long, with a width of 3,329 m at the northern entrance and 2,826 m at the southern entrance. Its maximum width is 3,420 m between Umuryeri and Büyükdere Limanı, and minimum width 700 m between Kandilli Point and Aşiyan, the depth of the Bosphorus varies from 13 to 110 m in midstream with an average of 65 m. The deepest location is between Kandilli and Bebek with 110 m, the most shallow locations are off Kadıköy İnciburnu on the northward route with 18 m and off Aşiyan Point on the southward route with 13 m. The study of the water and wind erosion of the straits relates to that of its formation, sections of the shore have been reinforced with concrete or rubble and sections of the strait prone to deposition are periodically dredged. These channels are the main pathway for sediments to the deep sea where they form sedimentary deposits. These deposits ultimately hold not only untapped reserves of gas and oil and our initial findings show that the flow in these channels is quite different to the flow in river channels on land. Specifically, as flow moves around a bend it spirals in the direction in the deep sea compared to the spiral found in river channels on land
7.
Pier
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A pier is a raised structure in a body of water, typically supported by well-spaced piles or pillars. Bridges, buildings, and walkways may all be supported by piers, Piers can range in size and complexity from a simple lightweight wooden structure to major structures extended over 1600 metres. In American English, pier may be synonymous with dock, thus in North America and Australia, where many ports were, until recently, built on the multiple pier model, the term tends to imply a current or former cargo-handling facility. In Europe in contrast, where more often use basins and river-side quays than piers. However, the earliest piers pre-date the Victorian age, Piers can be categorized into different groupings according to the principal purpose. However, there is overlap between these categories. Many piers are floating piers, to ensure that the piers raise and this prevents a situation where lines become overly taut or loose by rising or lowering tides. An overly taut or loose tie-line can damage boats by pulling out of the water or allowing them so much leeway that they bang forcefully against the sides of the pier. Working piers were built for the handling of passengers and cargo onto, working piers themselves fall into two different groups. Longer individual piers are found at ports with large tidal ranges. Such piers provided an alternative to impounded docks where cargo volumes were low, or where specialist bulk cargo was handled. The other form of working pier, often called the pier, was built at ports with smaller tidal ranges. Here the principal advantage was to give a greater available quay length for ships to berth against compared to a linear littoral quayside, typically each pier would carry a single transit shed the length of the pier, with ships berthing bow or stern in to the shore. Some major ports consisted of numbers of such piers lining the foreshore, classic examples being the Hudson River frontage of New York. One example, is in use in Progreso, Yucatán, where a pier extends more than 4 miles into the Gulf of Mexico, making it the longest pier in the world. The Progreso Pier supplies much of the peninsula with transportation for the fishing, many other working piers have been demolished, or remain derelict, but some have been recycled as pleasure piers. The best known example of this is Pier 39 in San Francisco, at Southport and the Tweed River on the Gold Coast in Australia, there are piers that support equipment for a sand bypassing system that maintains the health of sandy beaches and navigation channels. Pleasure piers were first built in Britain during the early 19th century, the earliest structures were Ryde Pier, built in 1813/4, Trinity Chain Pier near Leith, built in 1821, and Brighton Chain Pier, built in 1823
8.
Wharf
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A wharf, quay, staith or staithe is a structure on the shore of a harbor or on the bank of a river or canal where ships may dock to load and unload cargo or passengers. Such a structure includes one or more berths, and may also include piers, warehouses, a wharf commonly comprises a fixed platform, often on pilings. Commercial ports may have warehouses that serve as storage areas. A pier, raised over the rather than within it, is commonly used for cases where the weight or volume of cargos will be low. Smaller and more modern wharves are sometimes built on devices to keep them at the same level as the ship. In some contexts wharf and quay may be used to mean pier, berth, in old ports such as London many old wharves have been converted to residential or office use. Certain early railways in England referred to goods loading points as wharves, the term was carried over from marine usage. The person who was resident in charge of the wharf was referred to as a wharfinger. The word wharf comes from the Old English hwearf, meaning bank or shore, wharfage also refers to a fee charged by ports for the cargo handled there. Originally, werf or werva in Old Dutch simply referred to inhabited ground that was not yet built on and this could explain the name Ministry Wharf located at Saunderton, just outside High Wycombe, which is nowhere near any body of water. In support of this explanation is the fact that places in England with wharf in their names are in areas with a high Dutch influence. In the northeast and east of England the term staith or staithe is also used, both originally referred to staithes in the sense of jetties or wharves. However, the term staith may also be used to only to loading chutes or ramps used for bulk commodities like coal in loading ships. Quay, on the hand, has its origin in the Proto-Celtic language. Before it changed to its current form under influence of the modern French quai, its Middle English spelling was key and this in turn also came from the Old North French cai, both roughly meaning sand bank. The Old French term came from Gaulish caium, ultimately tracing back to the Proto-Celtic *kagio- to encompass, modern cognates include Welsh cae fence, hedge and Cornish ke hedge. Canal basin Dock Port Safeguarded wharf The dictionary definition of wharf at Wiktionary The dictionary definition of quay at Wiktionary
9.
Breakwater (structure)
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Breakwaters are structures constructed on coasts as part of coastal defense or to protect an anchorage from the effects of both weather and longshore drift. Breakwaters reduce the intensity of wave action in inshore waters and thereby reduce coastal erosion or provide safe harbourage, Breakwaters may also be small structures designed to protect a gently sloping beach and put one to three hundred thousand feet onshore in relatively shallow water. An anchorage is only safe if ships anchored there are protected from the force of high winds, natural harbours are formed by such barriers as headlands or reefs. Artificial harbours can be created with the help of breakwaters, mobile harbours, such as the D-Day Mulberry harbours, were floated into position and acted as breakwaters. Some natural harbours, such as those in Plymouth Sound, Portland Harbour, the dissipation of energy and relative calm water created in the lee of the breakwaters often encourage accretion of sediment. However, this can lead to excessive salient build up, resulting in tombolo formation and this trapping of sediment can cause adverse effects down-drift of the breakwaters, leading to beach sediment starvation and increased erosion. This may then lead to further engineering protection being needed down-drift of the breakwater development, Breakwaters are subject to damage, and overtopping in severe storms events. Breakwaters can be constructed with one end linked to the shore, length of gap is largely governed by the interacting wavelengths. Breakwaters may be fixed or floating, and impermeable or permeable to allow sediment transfer shoreward of the structures. They usually consist of pieces of rock weighing up to 16 tonnes each. Their design is influenced by the angle of approach and other environmental parameters. Breakwater construction can be parallel or perpendicular to the coast. Of these three, the angle at which the breakwater is built is most important in the formation of salients. The angle at which the breakwater is built determines the new direction of the waves, a breakwater structure is designed to absorb the energy of the waves that hit it, either by using mass, or by using a revetment slope. In coastal engineering, a revetment is a land backed structure whilst a breakwater is a sea backed structure, caisson breakwaters typically have vertical sides and are usually erected where it is desirable to berth one or more vessels on the inner face of the breakwater. They use the mass of the caisson and the fill within it to resist the forces applied by waves hitting them. They are relatively expensive to construct in shallow water, but in deeper sites they can offer a significant saving over revetment breakwaters, rubble mound breakwaters use structural voids to dissipate the wave energy. Rock or concrete armour units on the outside of the structure absorb most of the energy, the slopes of the revetment are typically between 1,1 and 1,2, depending upon the materials used
10.
Tugboat
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A tug is a boat or ship that maneuvers vessels by pushing or towing them. Tugboats are powerful for their size and strongly built, and some are ocean-going, some tugboats serve as icebreakers or salvage boats. Early tugboats had steam engines, but today most have diesel engines, many tugboats have firefighting monitors, allowing them to assist in firefighting, especially in harbors. Seagoing tugs fall into four categories, The standard seagoing tug with model bow that tows its payload on a hawser. The notch tug which can be secured in a notch at the stern of a specially designed barge and this configuration is dangerous to use with a barge which is in ballast or in a head- or following sea. Therefore, notch tugs are usually built with a towing winch and these units stay combined under virtually any sea conditions and the tugs usually have poor sea-keeping designs for navigation without their barges attached. Vessels in this category are considered to be ships rather than tugboats. These vessels must show navigation lights compliant with those required of ships rather than required of tugboats. Articulated tug and barge units also utilize mechanical means to connect to their barges, the tug slips into a notch in the stern and is attached by a hinged connection. ATBs generally utilize Intercon and Bludworth connecting systems, aTBs are generally staffed as a large tugboat, with between seven and nine crew members. The typical American ATB operating on the east coast customarily displays navigational lights of a towing vessel pushing ahead, compared to seagoing tugboats, harbour tugboats are generally smaller and their width-to-length ratio is often higher, due to the need for a lower draught. In smaller harbours these are also termed lunch bucket boats, because they are only manned when needed and only at a minimum. The number of tugboats in a harbour varies with the harbour infrastructure, things to take into consideration includes ships with/without bow thrusters and forces like wind, current and waves and types of ship. River tugs are also referred to as towboats or pushboats and their hull designs would make open ocean operation dangerous. River tugs usually do not have any significant hawser or winch and their hulls feature a flat front or bow to line up with the rectangular stern of the barge, often with large pushing knees. Tugboat engines typically produce 500 to 2,500 kW, for safety, tugboats engines often feature two of each critical part for redundancy. A tugboats power is stated by its engines horsepower and its overall bollard pull. The largest commercial harbour tugboats in the 2000s-2010s, used for towing container ships or similar, had around 60-65 tons of bollard pull, Tugboats are highly maneuverable, and various propulsion systems have been developed to increase maneuverability and increase safety
11.
Mooring (watercraft)
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A mooring refers to any permanent structure to which a vessel may be secured. Examples include quays, wharfs, jetties, piers, anchor buoys, a ship is secured to a mooring to forestall free movement of the ship on the water. An anchor mooring fixes a vessels position relative to a point on the bottom of a waterway connecting the vessel to shore. As a verb, mooring refers to the act of attaching a vessel to a mooring, the term likely stems from the Dutch verb meren, used in English since the end of the 15th century. These moorings are used instead of temporary anchors because they have considerably more holding power, cause damage to the marine environment. They are also used to hold floating docks in place. There are several kinds of moorings, Swing moorings also known as simple or single-point moorings, are the simplest and most common kind of mooring, a swing mooring consists of a single anchor at the bottom of a waterway with a rode running to a float on the surface. The float allows a vessel to find the rode and connect to the anchor and these anchors are known as swing moorings because a vessel attached to this kind of mooring swings in a circle when the direction of wind or tide changes. The heavy weight should be a dense material, old rail wagon wheels are used in some places for this purpose. In some harbours, very heavy chain may be placed in a pattern on the sea bed to ensure orderly positioning of moorings. Ropes should be non floating to reduce likelihood of a boats prop being fouled by one, pile moorings are poles driven into the bottom of the waterway with their tops above the water. Vessels then tie mooring lines to two or four piles to fix their position between those piles, pile moorings are common in New Zealand but rare elsewhere. While many mooring buoys are privately owned, some are available for public use, for example, on the Great Barrier Reef off the Australian coast, a vast number of public moorings are set out in popular areas where boats can moor. This is to avoid the damage that would be caused by many vessels anchoring. There are four types of permanent anchors used in moorings. They are generally made as a concrete block with a rode attached which resists movement with sheer weight. In New Zealand old railway wheels are sometimes used, the advantages are that they are simple and cheap. A dead weight mooring that drags in a storm still holds well in its new position, such moorings are better suited to rocky bottoms where other mooring systems do not hold well
