Maritime transport
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Template:Redirect6 Ship transport is primarily used for the carriage of people and non-perishable goods, generally referred to as cargo.
Although the historic importance of sea travel has lost much importance due to the rise of commercial aviation, it is still very effective for short trips and pleasure cruises. Nonetheless, sea transport remains the largest carrier of freight in the world.
While slower than air transport, modern sea transport is a highly effective method of moving large quantities of non-perishable goods. More than 6 billion tons of cargo were delivered by sea in 2005. In addition to cargo carriage, one can consider scientific voyages and races as forms of ship transport. Transport by water is significantly less costly than transport by air for trans-continental shipping.
Ship transport is often international by nature, but it can be accomplished by barge, boat, ship or sailboat over a sea, ocean, lake, canal or river. This is frequently undertaken for purposes of commerce, recreation or military objectives. When a cargo is carried by more than one mode, the transport is termed intermodal.
Ships have long been used for warfare, with applications from naval supremacy to piracy, invasions and bombardment. Aircraft carriers can be used as bases of a wide variety of military operations.
Ship transport is used for a variety of unpackaged raw materials ranging from chemicals, petroleum products, and bulk cargo such as coal, iron ore, cereals, bauxite, and so forth. So called "general cargo" covers goods that are packaged to some extent in boxes, cases, pallets, barrels, and so forth. Since the 1960s containerization has revolutionized ship transport.
History
The first craft were probably types of canoes cut out from tree trunks. The colonization of Australia by Indigenous Australians provides indirect but conclusive evidence for the latest date for the invention of ocean-going craft; land bridges linked southeast Asia through most of the Malay Archipelago but a strait had to be crossed to arrive at New Guinea, which was then linked to Australia. Ocean-going craft were required for the colonization to happen.
Early sea transport was accomplished with ships that were either rowed or used the wind for propulsion, and often, in earlier times with smaller vessels, a combination of the two.
Also there have been horse-powered boats, with horses on the deck providing power [1].
Ship transport was frequently used as a mechanism for conducting warfare. Military use of the seas and waterways is covered in greater detail under navy.
In the 1800s the first steam ships were developed, using a steam engine to drive a paddle wheel or propeller to move the ship. The steam was produced using wood or coal. Now most ships have an engine using a slightly refined type of petroleum called bunker fuel. Some specialized ships, such as submarines, use nuclear power to produce the steam.
Pallets made their first major appearance during World War II, when the United States military assembled freight on pallets, allowing fast transfer between warehouses, trucks, trains, ships, and aircraft. Because no freight handling was required, fewer personnel were required and loading times were decreased.
While rudimentary freight containers, then known as lift vans, were used in the United States as early as 1911, it was not until the 1950s that containers started to revolutionize freight transportation. One pioneering railway was the White Pass and Yukon Route, who acquired the world's first container ship, the Clifford J. Rogers, built in 1955, and introduced containers to its railway in 1956. Starting in the 1960s the use of containers increased steadily.
Standards for containers were issued by the International Organization for Standardization (ISO) between 1968 and 1970, ensuring interchangeability between different modes of transportation worldwide. The containers became known as ISO containers for this reason. Either 20 feet or 40 feet, these "boxes" revolutionized not only the means of transport, but the logistic chain from the supplier to the final customer. Road, railway and even air transport adapted to make these boxes a "unit of intermodal transport." Once placed into the container, the goods do not undergo any other handling prior to reaching the destination. What is handled is thus the container and not the contents, eliminating the concept of "breaking bulk."
Containers are specially designed to be easily handled, stored, transported, and give a number of advantages:
- fewer damages and breakages,
- less loss and theft,
- cheaper handling due to more efficiency in loading and discharge
An example of such a major intermodal project was the $740,000,000 Port of Oakland intermodal rail facility begun in the late 1980s.[1][2]
More and more, containers are transported aboard specialized integral container ships. The holds are arranged in a system of cells and rails, making it possible to quickly move containers in and out of the hold.
Economies of scale have dictated an upward trend in sizes of container ships in order to reduce costs. One limit on ship size is the "Suezmax" standard, or the largest theoretical ship capable of passing through the Suez Canal, which measures 14,000 TEUs. Such a vessel would displace 137,000 DWT, be 400 meters long, more than 50 meters wide, have a draft of nearly 15 metres, and use more than 85 MW to achieve 25.5 knots, specifications met by the Emma Mærsk.
Beyond Suezmax lies the "Malaccamax" (for Straits of Malacca) ship of 18,000 TEUs, displacing 200,000 DWT, 470 meters long, 60 meters wide, 16 meters of draft, and using more than 100 MW for 25.5 knots. This is most likely the limit before a major restructuring of world container trade routes.[3] The biggest constraint of this design, the absence of a capable single engine, has been overcome by the MAN B&W K108ME-C.
The ultimate problem was the absence of a manufacturer capable of producing the propeller needed for transmitting this power, which would be about 10 metres in diameter, and weigh 130 tonnes. One has since been built for the Emma Mærsk. Other constraints, such as time in port and flexibility of service routes are similar to the constraints that eventually limited the growth in size of supertankers.
As of the new M/V Emma Mærsk container ships can carry up to 12,000 containers, and the total value of cargo per vessel can reach $300 million. The ceaseless transit of these containers (at any given time, between 5 million and 6 million units) entails a great deal of risk.
Merchant shipping
A nation's merchant fleet comprises the ships that are used to transport cargo during times of peace and war. A country's merchant marine or Merchant Navy is the combination of the fleet with the people who man it. There are a number of terms applied to the people who operate the ships, from merchant sailor to merchant mariner, to simply sailor or mariner.
According to the 2005 CIA World Factbook, the world total number of merchant ships of 1,000 Gross Register Tons or over was 30,936. Statistics for individual countries are available at the List of merchant marine capacity by country.
Professional mariners
Seafarers hold a variety of professions and ranks, each of which carry unique responsibilities which are integral to the successful operation of a seafaring vessel. A ship's complement can generally be divided into four main categories: the deck department, the engineering department, the steward's department, and other.
Deck department
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Officer positions in the deck department include but not limited to: Master and his Chief, Second, and Third officers. The official classifications for unlicensed members of the deck department are Able Seaman and Ordinary Seaman.
A common deck crew for a ship includes:
- (1) Chief Officer/Chief Mate
- (1) Second Officer /Second Mate
- (1) Third Officer / Third Mate
- (1) Boatswain
- (2-6) Able Seamen
- (0-2) Ordinary Seamen
Engineering department
A ship's engineering department consists of the members of a ship's crew that operate and maintain the propulsion and other systems onboard the vessel. Marine Engineering staff also deal with the "Hotel" facilities onboard, notably the sewage, lighting, air conditioning and water systems. They deal with bulk fuel transfers, and require training in firefighting and first aid, as well as in dealing with the ship's boats and other nautical tasks- especially with cargo loading/discharging gear and safety systems, though the specific cargo discharge function remains the responsibility of deck officers and deck workers.
A common Engineering crew for a ship includes:
- (1) Chief Engineer
- (1) Second Engineer / First Assistant Engineer
- (1) Third Engineer / Second Assistant Engineer
- (1-2) Fourth Engineer / Third Assistant Engineer
- (0-2) Fifth Engineer / Junior Engineer
- (1-3) Oiler (unlicenced qualified rating)
- (0-3) Greaser/s (unlicensed qualified rating)
- (1-5) Entry-level rating (such as Wiper (occupation), Utilityman, etc)
American ships also carry a Qualified Member of the Engine Department. Other possible positions include Motorman, Machinist, Electrician, Refrigration Engineer, and Tankerman.
Steward's department
A typical Steward's department for a cargo ship would be composed of a Chief Steward, a Chief Cook, and a Steward's Assistant. All three positions are typically filled by unlicensed personnel.
The chief steward directs, instructs, and assigns personnel performing such functions as preparing and serving meals; cleaning and maintaining officers' quarters and steward department areas; and receiving, issuing, and inventorying stores.
The chief steward also plans menus; compiles supply, overtime, and cost control records. May requisition or purchase stores and equipment. May bake bread, rolls, cakes, pies, and pastries.
A chief steward's duties may overlap with those of the Steward's Assistant, the Chief Cook, and other Steward's Department crewmembers.
In the United States Merchant Marine, in order to be occupied as a chief steward a person has to have a Merchant Mariner's Document issued by the United States Coast Guard. Because of international conventions and agreements, all chief cooks who sail internationally are similarly documented by their respective countries.
Other Departments
Various types of staff officer positions may exist on board a ship, including Junior Assistant Purser, Senior Assistant Purser, Purser, Chief Purser, Medical Doctor, Professional Nurse, Marine Physician Assistant, and Hospital Corpsman, are considered administrative positions and are therefore regulated by Certificates of Registry issued by the United States Coast Guard. Pilots are also merchant marine officers and are licensed by the Coast Guard.
Life at sea
Mariners live on the margins of society, with much of their life spent beyond the reach of land. They face cramped, stark, noisy, and sometimes dangerous conditions at sea. Yet men and women still go to sea. For some, the attraction is a life unencumbered with the restraints of life ashore. Sea-going adventure and a chance to see the world also appeal to many seafarers. Whatever the calling, those who live and work at sea invariably confront social isolation.
Findings by the Seafarer's International Research Center indicate a leading cause of mariners leaving the industry is "almost invariably because they want to be with their families." U.S. merchant ships typically do not allow family members to accompany seafarers on voyages. Industry experts increasingly recognize isolation, stress, and fatigue as occupational hazards. Advocacy groups such as International Labor Organization, a United Nations agency, and the Nautical Institute are seeking improved international standards for mariners.
Ocean voyages are steeped in routine. Maritime tradition dictates that each day be divided into six four-hour periods. Three groups of watchkeepers from the engine and deck departments work four hours on then have eight hours off watchkeeping. However there are many overtime jobs to be done daily. This cycle repeats endlessly, 24 hours a day while the ship is at sea. Members of the steward department typically are day workers who put in at least eight-hour shifts. Operations at sea, including repairs, safeguarding against piracy, securing cargo, underway replenishment, and other duties provide opportunities for overtime work. One’s service aboard ships typically extends for months at a time, followed by protracted shore leave. However, some seamen secure jobs on ships they like and stay aboard for years.
In rare cases, veteran mariners choose never to go ashore when in port. Further, the often quick turnaround of many modern ships, spending only a matter of hours in port, limits a seafarer's free-time ashore. Moreover, some foreign seamen entering U.S. ports from a watchlist of 25 high-risk countries face restrictions on shore leave due to security concerns in a post 9/11 environment. However, shore leave restrictions while in U.S. ports impact American seamen as well. For example, the International Organization of Masters, Mates & Pilots notes a trend of U.S. shipping terminal operators restricting seamen from traveling from the ship to the terminal gate. Further, in cases where transit is allowed, special "security fees" are at times assessed.
Such restrictions on shore leave coupled with reduced time in port by many ships translate into longer periods at sea. Mariners report that extended periods at sea living and working with shipmates who for the most part are strangers takes getting used to. At the same time, there is an opportunity to meet people from a wide range of ethnic and cultural backgrounds. Recreational opportunities have improved aboard some U.S. ships, which may feature gyms and day rooms for watching movies, swapping sea stories, and other activities. And in some cases, especially tankers, it is made possible for a mariner to be accompanied by members of his family. However, a mariner’s off duty time is largely a solitary affair, pursuing hobbies, reading, writing letters, and sleeping.
Merchant Navy/Merchant Marine
Many countries have their own merchant fleets.
British Merchant Navy
The British Merchant Navy or simply Merchant Navy comprises the British merchant ships that transport cargo and people during time of peace and war.
For long periods of the last millennium, the Merchant Navy had the largest merchant fleet in the world, but it has slipped down the rankings. Today, there are 429 ships of 1,000 GRT or over, making a total of 9,181,284 GRT (9,566,275 DWT). These are split into the following types: bulk carrier 18, cargo 55, chemical tanker 48, container 134, liquefied gas 11, passenger 12, passenger/cargo 64, petroleum tanker 40, refrigerated cargo 19, roll on/roll off 25, vehicle carrier 3. There are also 446 ships registered in other countries, and 202 foreign-owned ships registered in the UK. (2005 CIA estimate)
Due to the United Kingdom's island nature, before the Channel Tunnel and the advent of air travel the only way to enter or leave the country was on water, except at the border between Northern Ireland and the Republic of Ireland.
Canadian Merchant Navy
Canada, like several other Commonwealth nations created its own Merchant Navy in a large-scale effort in World War Two. The Canadian Merchant Navy played a major role in the Battle of the Atlantic bolstering the allies merchant fleet due to high losses in the British Merchant Navy. Eventually thousands of Canadians served in the Merchant Navy aboard hundreds of Canadian merchant ships, notably the "Park Ships", the Canadian equivalent of the American "Liberty Ship". A school at St. Margaret's Bay, Nova Scotia trained Canadian merchant mariners. "Manning Pools", Merchant Navy barracks were built in Canadian ports. Considered a fourth branch of the Canadian military, after the Canadian Army, Royal Canadian Navy, and Royal Canadian Air Force, the Canadian Merchant Navy suffered a higher casualty rate of the four services. Sadly, after the war, Canadian Merchant Navy veterans were denied veterans benefits and official recognition for decades. This injustice was not corrected until the 1990s and many individual cases remain unresolved.
Swiss Merchant Marine
Switzerland has a civilian high seas fleet of merchant vessels, whose home port is Basel, in Switzerland. The first ships were purchased and operated by the government in order to ensure the supply of critical resources during World War II. After the war, a privately owned merchant fleet emerged, spurred in part by government subsidies that paid for the fleet's operation up until 1953.
As of 2006, 26 ships (mostly container carriers) totalling 479,624 tons, operated by five shipping companies, fly the Swiss flag.
United States Merchant Marine
The United States Merchant Marine is made up of the nation's civilian-owned merchant ships and the men and women that crew them. The merchant marine transports cargo and passengers during peace time. In time of war, the merchant marine[5] is an auxiliary to the Navy, and can be called upon to deliver troops and supplies for the military.
The people of the merchant marine are called merchant mariners, and are civilian except in times of war, when, in accordance with the Merchant Marine Act of 1936 they are considered military personnel.
As of 2006, the United States merchant fleet numbered 465 ships[6] and approximately 69,000 people. Seven hundred ships owned by American interests but registered, or flagged, in other countries are not included in this number .
Ships and watercraft
Ships and other watercraft are used for ship transport. Various types can be distinguished by propulsion, size or cargo type. Recreational or educational craft still use wind power, while some smaller craft use internal combustion engines to drive one or more propellers, or in the case of jet boats, an inboard water jet. In shallow draft areas, such as the Everglades, some craft, such as the hovercraft, are propelled by large pusher-prop fans.
Most modern merchant ships can be placed in one of a few categories, such as:
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Bulk carriers are cargo ships used to transport bulk cargo items such as ore or food staples (rice, grain, etc.) and similar cargo. It can be recognized by the large box-like hatches on its deck, designed to slide outboard for loading. A bulk carrier could be either dry or wet. Most lakes are too small to accommodate bulk ships, but a large fleet of lake freighters has been plying the Great Lakes and St. Lawrence Seaway of North America for over a century. |
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Container ships are cargo ships that carry all of their load in truck-size containers, in a technique called containerization. They form a common means of commercial intermodal freight transport. Informally known as "box boats," they carry the majority of the world's dry cargo. Most container ships are propelled by diesel engines, and have crews of between 20 and 40 people. They generally have a large accommodation block at the stern, directly above the engine room. Container ships now carry up to 15,000 containers on a voyage. |
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Tankers are cargo ships for the transport of fluids, such as crude oil, petroleum products, liquefied petroleum gas, liquefied natural gas and chemicals, also vegetable oils, wine and other food - the tanker sector comprises one third of the world tonnage. |
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Reefer ships are cargo ships typically used to transport perishable commodities which require temperature-controlled transportation, mostly fruits, meat, fish, vegetables, dairy products and other foodstuffs. |
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Roll-on/roll-off ships are cargo ships designed to carry wheeled cargo such as automobiles, trailers or railway carriages. RORO vessels have built-in ramps which allow the cargo to be efficiently "rolled on" and "rolled off" the vessel when in port. While smaller ferries that operate across rivers and other short distances still often have built-in ramps, the term RORO is generally reserved for larger ocean-going vessels. |
| File:Feederschiff-HH.jpg | Coastal trading vessels, also known as coasters, are shallow-hulled ships used for trade between locations on the same island or continent. Their shallow hulls mean that they can get through reefs where sea-going ships usually cannot (sea-going ships have a very deep hull for supplies and trade etc.). |
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Ferries are a form of transport, usually a boat or ship, but also other forms, carrying (or ferrying) passengers and sometimes their vehicles. Ferries are also used to transport freight (in lorries and sometimes unpowered freight containers) and even railroad cars. Most ferries operate on regular, frequent, return services. A foot-passenger ferry with many stops, such as in Venice, is sometimes called a waterbus or water taxi. Ferries form a part of the public transport systems of many waterside cities and islands, allowing direct transit between points at a capital cost much lower than bridges or tunnels. |
| File:Pacskysydbridge web.jpg | Cruise ships are passenger ships used for pleasure voyages, where the voyage itself and the ship's amenities are considered an essential part of the experience. Cruising has become a major part of the tourism industry, with millions of passengers each year as of 2006. The industry's rapid growth has seen nine or more newly built ships catering to a North American clientele added every year since 2001, as well as others servicing European clientele. Smaller markets such as the Asia-Pacific region are generally serviced by older tonnage displaced by new ships introduced into the high growth areas. |
| File:Cable Layer1.JPG | Cable layer is a deep-sea vessel designed and used to lay underwater cables for telecommunications, electricity, and such. A large superstructure, and one or more spools that feed off the transom distinguish it. |
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A tugboat is a boat used to manoeuvre, primarily by towing or pushing other vessels (see shipping) in harbours, over the open sea or through rivers and canals. They are also used to tow barges, disabled ships, or other equipment like towboats. |
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A dredger is a ship used to excavate in shallow seas or fresh water areas with the purpose of gathering up bottom sediments and disposing of them at a different location. |
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A barge is a flat-bottomed boat, built mainly for river and canal transport of heavy goods. Most barges are not self-propelled and need to be moved by tugboats towing or towboats pushing them. Barges on canals (towed by draft animals on an adjacent towpath) contended with the railway in the early industrial revolution but were outcompeted in the carriage of high value items due to the higher speed, falling costs, and route flexibility of rail transport. |
Ships do exist that fall outside these categories, such as Semi-submersible heavy-lift ships.
Ship transport infrastructure
For a port to efficiently send and receive cargo, it requires some infrastructure. Harbors, seaports and marinas host watercraft, and consist of components such as piers, wharfs, docks and roadsteads.
A port is a facility for receiving ships and transferring cargo to and from them. They are usually situated at the edge of an ocean or sea, river, or lake. Ports often have cargo-handling equipment such as cranes (operated by stevedores) and forklifts for use in loading/unloading of ships, which may be provided by private interests or public bodies. Often, canneries or other processing facilities will be located very close by. Harbour pilots , barges and tugboats are often used to safely maneuver large ships in tight quarters as they approach and leave the docks. Ports which handle international traffic will have customs facilities.
Access to other transport systems, such as rail and truck terminals can contribute to a port's efficiency. Some ports feature canals, allow further movement inland.
The presence of deep water in channels or berths, the provision of protection from the wind, waves and storm surges and access to intermodal transportation such as trains or trucks are critical to a good port. A port must also have navigational aids such as lighthouses, buoys and sea marks.
See also
- List of maritime colleges
- Hull (ship)
- Hydrofoil
- Rivers
- Sailing
- Ship-owner
- Shipping line
- Very Large Flexible Barges (VLFBs) or "Medusa Bags"
- Transshipment
External links
- The Logistics Institute. The International Certifying body for the P.Log. designation.
- LQ Magazine (Logistics Quarterly)
- Images of Ships.
- Life At Sea A blog by Nandkishore gitte
- ^ Initial Study: Intermodal Interface Demonstration Project, Port of Oakland, Oakland, California, Earth Metrics and Korve Engineerning, December 20, 1989
- ^ Port of Oakland Official Site: Facts and Figures (2006)
- ^ Propulsion Trends in Container Vessels, MAN B&W, 19 January 2005 (accessed 16 November 2005)
- ^ "Rank Order - Merchant marine". CIA.gov. Retrieved 2007-05-21.
- ^ Most English-speaking countries call their fleet the Merchant Navy. Terms similar to Merchant Marine are used in, for example, the French Marine Marchande and the Spanish Marina Mercante.
- ^ Ships of 1,000 gross register tons or over. Fleet statistics from the 2006 CIA World Factbook