Misplaced Pages

#746253

79-403: Water sports such as sailing , kayaking , sport fishing and water skiing are popular in the summer due to the lake's warm waters (surface temperatures range from 19 to 22 °C). In winter, the average water temperature is around 10 °C. The Villarrica Volcano , one of the ten most active in the world, is situated to the south of the lake. There are two Chile National Parks close by:

158-426: A better return on capital. In the 21st century, most sailing represents a form of recreation or sport . Recreational sailing or yachting can be divided into racing and cruising . Cruising can include extended offshore and ocean-crossing trips, coastal sailing within sight of land, and daysailing. Sailing relies on the physics of sails as they derive power from the wind, generating both lift and drag. On

237-423: A chosen course , which is often part of a larger plan of navigation . From prehistory until the second half of the 19th century, sailing craft were the primary means of maritime trade and transportation; exploration across the seas and oceans was reliant on sail for anything other than the shortest distances. Naval power in this period used sail to varying degrees depending on the current technology, culminating in

316-456: A discovery or if no land was found. This was well suited to the prevailing winds as Pacific islands were steadily colonized. By the time of the Age of Discovery —starting in the 15th century—square-rigged, multi-masted vessels were the norm and were guided by navigation techniques that included the magnetic compass and making sightings of the sun and stars that allowed transoceanic voyages. During

395-409: A given course, the sails are set to an angle that optimizes the development of wind power, as determined by the apparent wind , which is the wind as sensed from a moving vessel. The forces transmitted via the sails are resisted by forces from the hull , keel , and rudder of a sailing craft, by forces from skate runners of an iceboat, or by forces from wheels of a land sailing craft which are steering

474-604: A much smaller scale. In the 1920s and 1930s, farmers in Australia and Canada reacted against the pricing power of the large grain-handling and shipping companies. Their governments created the Australian Wheat Board and the Canadian Wheat Board as monopsony marketing boards , buying all the wheat in those countries for export. Together, those two boards controlled a large percentage of

553-423: A parachute, with drag predominantly propelling the craft. For craft with little forward resistance, such as ice boats and land yachts , this transition occurs further off the wind than for sailboats and sailing ships . Wind direction for points of sail always refers to the true wind —the wind felt by a stationary observer. The apparent wind —the wind felt by an observer on a moving sailing craft—determines

632-400: A sailboat, point of sail affects lateral force significantly. The higher the boat points to the wind under sail, the stronger the lateral force, which requires resistance from a keel or other underwater foils, including daggerboard, centerboard, skeg and rudder. Lateral force also induces heeling in a sailboat, which requires resistance by weight of ballast from the crew or the boat itself and by

711-434: A sailing craft turns its stern past the eye of the wind so that the apparent wind changes from one side to the other, allowing progress on the opposite tack. This maneuver can be done on smaller boats by pulling the tiller towards yourself (the opposite side of the sail). As with tacking, the type of sailing rig dictates the procedures and constraints for jibing. Fore-and-aft sails with booms, gaffs or sprits are unstable when

790-719: A sailing yacht may be either near-shore or passage-making out of sight of land and entails the use of sailboats that support sustained overnight use. Coastal cruising grounds include areas of the Mediterranean and Black Seas, Northern Europe, Western Europe and islands of the North Atlantic, West Africa and the islands of the South Atlantic, the Caribbean, and regions of North and Central America. Passage-making under sail occurs on routes through oceans all over

869-400: A series of broad reaches, punctuated by jibes in between. It was explored by sailing vessels starting in 1975 and now extends to high-performance skiffs, catamarans and foiling sailboats. Navigating a channel or a downwind course among obstructions may necessitate changes in direction that require a change of tack, accomplished with a jibe. Jibing or gybing is a sailing maneuver by which

SECTION 10

#1732773332747

948-437: A smooth laminar flow , leading from one to the other in what is called the "slot effect". On downwind points of sail, power is achieved primarily with the wind pushing on the sail, as indicated by drooping tell-tales. Spinnakers are light-weight, large-area, highly curved sails that are adapted to sailing off the wind. In addition to using the sheets to adjust the angle with respect to the apparent wind, other lines control

1027-527: A square mile) or more for little or no fee. This moved grain growing, and hence trading, to a much more massive scale. Huge grain elevators were built to take in farmers' produce and move it out via the railways to port. Transportation costs were a major concern for farmers in remote regions, however, and any technology that allowed the easier movement of grain was of great assistance; meanwhile, farmers in Europe struggled to remain competitive while operating on

1106-439: A surplus of it, but rather to produce everything his family needs and become self-sufficient . Only in places and eras where production is geared towards producing a surplus for trade ( commercial agriculture ), does a major grain trade become possible. In the ancient world, grain regularly flowed from the hinterlands to the cores of great empires: maize in ancient Mexico , rice in ancient China , and wheat and barley in

1185-423: A wider range of apparent wind angles than does an ice boat, whose speed is typically great enough to have the apparent wind coming from a few degrees to one side of its course, necessitating sailing with the sail sheeted in for most points of sail. On conventional sailboats, the sails are set to create lift for those points of sail where it's possible to align the leading edge of the sail with the apparent wind. For

1264-408: Is a maneuver by which a sailing craft turns its bow into and through the wind (referred to as "the eye of the wind" ) so that the apparent wind changes from one side to the other, allowing progress on the opposite tack. The type of sailing rig dictates the procedures and constraints on achieving a tacking maneuver. Fore-and-aft rigs allow their sails to hang limp as they tack; square rigs must present

1343-487: Is because the river's current flows from south to north, whilst the prevailing wind direction is north to south. Therefore, a boat of that time could use the current to go north – an unobstructed trip of 750 miles – and sail to make the return trip. Evidence of early sailors has also been found in other locations, such as Kuwait, Turkey, Syria, Minoa, Bahrain, and India, among others. Austronesian peoples used sails from some time before 2000 BCE. Their expansion from what

1422-486: Is governed by World Sailing with most racing formats using the Racing Rules of Sailing . It entails a variety of different disciplines, including: A saildrone is a type of unmanned surface vehicle used primarily in oceans for data collection. Saildrones are wind and solar powered and carry a suite of science sensors and navigational instruments. They can follow a set of remotely prescribed waypoints. The saildrone

1501-644: Is important to many societies, providing a caloric base for most food systems as well as important role in animal feed for animal agriculture . The grain trade is as old as agricultural settlement, identified in many of the early cultures that adopted sedentary farming. Major societal changes have been directly connected to the grain trade, such as the fall of the Roman Empire . From the early modern period onward, grain trade has been an important part of colonial expansion and international power dynamics. The geopolitical dominance of countries like Australia,

1580-482: Is now Southern China and Taiwan started in 3000 BCE. Their technology came to include outriggers , catamarans , and crab claw sails , which enabled the Austronesian Expansion at around 3000 to 1500 BCE into the islands of Maritime Southeast Asia , and thence to Micronesia , Island Melanesia , Polynesia , and Madagascar . Since there is no commonality between the boat technology of China and

1659-413: Is on a broad reach. Boat velocity (in black) generates an equal and opposite apparent wind component (not shown), which combines with the true wind to become apparent wind. The speed of sailboats through the water is limited by the resistance that results from hull drag in the water. Ice boats typically have the least resistance to forward motion of any sailing craft. Consequently, a sailboat experiences

SECTION 20

#1732773332747

1738-486: The 2007–2008 world food price crisis . More recently, the dominance of Ukraine and Russia in grain markets such as wheat meant that the Russian invasion of Ukraine in 2022 caused increased fears of a global food crises in 2022 . Changes to agriculture caused by climate change are expected to have cascading effects on global grain markets. The grain trade is probably nearly as old as grain growing , going back

1817-576: The Huerquehue and the Villarrica . The latter is famous for its natural hot springs . This La Araucanía Region location article is a stub . You can help Misplaced Pages by expanding it . Sailing Sailing employs the wind—acting on sails , wingsails or kites —to propel a craft on the surface of the water ( sailing ship , sailboat , raft , windsurfer , or kitesurfer ), on ice ( iceboat ) or on land ( land yacht ) over

1896-501: The Neolithic Revolution (around 9,500 BCE). Wherever there is a scarcity of land (e.g. cities), people must bring in food from outside to sustain themselves, either by force or by trade. However, many farmers throughout history (and today) have operated at the subsistence level , meaning they produce for household needs and have little leftover to trade. The goal for such farmers is not to specialize in one crop and grow

1975-476: The River Tyne to London – which was already being carried out in the 14th century and grew as the city increased in size. In 1795, 4,395 cargoes of coal were delivered to London. This would have needed a fleet of about 500 sailing colliers (making 8 or 9 trips a year). This quantity had doubled by 1839. (The first steam-powered collier was not launched until 1852 and sailing colliers continued working into

2054-813: The World Trade Organization , or attempted to negotiate them away though the Cairns Group , at the same time the wheat boards have been reformed and many tariffs have been greatly reduced, leading to a further globalization of the industry. For example, in 2008 Mexico was required by the North American Free Trade Agreement (NAFTA) to remove its tariffs on US and Canadian maize . Similarly, protections in other contexts, such as guaranteed prices for grains in India, have been an important lifeline for small farmers in

2133-466: The ancient Near East . With this came improving technologies for storing and transporting grains; the Hebrew Bible makes frequent mention of ancient Egypt 's massive grain silos . Merchant shipping was important for the carriage of grain in the classical period (and continues to be so). A Roman merchant ship could carry a cargo of grain the length of the Mediterranean for the cost of moving

2212-409: The motive power for sailing craft. The waves give an indication of the true wind direction. The flag gives an indication of apparent wind direction. True wind velocity ( V T ) combines with the sailing craft's velocity ( V B ) to give the apparent wind velocity ( V A ), the air velocity experienced by instrumentation or crew on a moving sailing craft. Apparent wind velocity provides

2291-508: The saildrones completed the mission, traveling 12,500 miles (20,100 km) over the seven month journey while collecting a detailed data set using on board environmental monitoring instrumentation. In August 2019, SD 1021 completed the fastest unmanned Atlantic crossing sailing from Bermuda to the UK, and in October, it completed the return trip to become the first autonomous vehicle to cross

2370-497: The steamship shifted trade from local to more international patterns. During this time, debate over tariffs and free trade in grain was fierce. Poor industrial workers relied on cheap bread for sustenance, but farmers wanted their government to create a higher local price to protect them from cheap foreign imports , resulting in legislation such as Britain's Corn Laws . As Britain and other European countries industrialized and urbanized, they became net importers of grain from

2449-424: The 1870s to 1900, when steamships began to outpace them economically because of their ability to keep a schedule regardless of the wind. Steel hulls also replaced iron hulls at around the same time. Even into the twentieth century, sailing ships could hold their own on transoceanic voyages such as Australia to Europe, since they did not require bunkerage for coal nor fresh water for steam, and they were faster than

Lake Villarrica - Misplaced Pages Continue

2528-428: The 20th century.) The earliest image suggesting the use of sail on a boat may be on a piece of pottery from Mesopotamia , dated to the 6th millennium BCE. The image is thought to show a bipod mast mounted on the hull of a reed boat – no sail is depicted. The earliest representation of a sail, from Egypt, is dated to circa 3100 BCE. The Nile is considered a suitable place for early use of sail for propulsion. This

2607-641: The Age of Discovery, sailing ships figured in European voyages around Africa to China and Japan; and across the Atlantic Ocean to North and South America. Later, sailing ships ventured into the Arctic to explore northern sea routes and assess natural resources. In the 18th and 19th centuries sailing vessels made Hydrographic surveys to develop charts for navigation and, at times, carried scientists aboard as with

2686-608: The Atlantic in both directions. The University of Washington and the Saildrone company began a joint venture in 2019 called The Saildrone Pacific Sentinel Experiment, which positioned six saildrones along the west coast of the United States to gather atmospheric and ocean data. A sailing craft's ability to derive power from the wind depends on the point of sail it is on—the direction of travel under sail in relation to

2765-475: The Austronesians, these distinctive characteristics must have been developed at or some time after the beginning of the expansion. They traveled vast distances of open ocean in outrigger canoes using navigation methods such as stick charts . The windward sailing capability of Austronesian boats allowed a strategy of sailing to windward on a voyage of exploration, with a return downwind either to report

2844-494: The United States, Canada and the Soviet Union during the 20th century was connected with their status as grain surplus countries. More recently, international commodity markets have been an important part of the dynamics of food systems and grain pricing . Speculation , as well as other compounding production and supply factors leading up to the 2007–2008 financial crises , created rapid inflation of grain prices during

2923-488: The angle of a fore-and-aft sail with respect to the apparent wind is controlled with a line, called a "sheet". On points of sail between close-hauled and a broad reach, the goal is typically to create flow along the sail to maximize power through lift. Streamers placed on the surface of the sail, called tell-tales , indicate whether that flow is smooth or turbulent. Smooth flow on both sides indicates proper trim. A jib and mainsail are typically configured to be adjusted to create

3002-412: The availability, strength and direction of the wind is key to using its power along the desired course. Ocean currents, tides and river currents may deflect a sailing vessel from its desired course. If the desired course is within the no-go zone, then the sailing craft must follow a zig-zag route into the wind to reach its waypoint or destination. Downwind, certain high-performance sailing craft can reach

3081-400: The boat for the night, and cruising, where one stays aboard. Day-sailing primarily affords experiencing the pleasure of sailing a boat. No destination is required. It is an opportunity to share the experience with others. A variety of boats with no overnight accommodations, ranging in size from 10 feet (3.0 m) to over 30 feet (9.1 m), may be regarded as day sailors. Cruising on

3160-456: The city of Rome was considered to be of the utmost strategic importance to Roman generals and politicians. In Europe, with the fall of the Roman Empire and the rise of feudalism , many farmers were reduced to a subsistence level, producing only enough to fulfill their obligation to their lord and the Church , with little for themselves, and even less for trading. The little that was traded

3239-623: The course. This combination of forces means that it is possible to sail an upwind course as well as downwind. The course with respect to the true wind direction (as would be indicated by a stationary flag) is called a point of sail . Conventional sailing craft cannot derive wind power on a course with a point of sail that is too close into the wind. Throughout history, sailing was a key form of propulsion that allowed for greater mobility than travel over land. This greater mobility increased capacity for exploration, trade, transport, warfare, and fishing, especially when compared to overland options. Until

Lake Villarrica - Misplaced Pages Continue

3318-424: The delivery by sailing ships of the large amounts of grain needed. It has been estimated that it cost less for a sailing ship of the Roman Empire to carry grain the length of the Mediterranean than to move the same amount 15 miles by road. Rome consumed about 150,000 tons of Egyptian grain each year over the first three centuries AD. A similar but more recent trade, in coal, was from the mines situated close to

3397-411: The destination more quickly by following a zig-zag route on a series of broad reaches. Negotiating obstructions or a channel may also require a change of direction with respect to the wind, necessitating changing of tack with the wind on the opposite side of the craft, from before. Changing tack is called tacking when the wind crosses over the bow of the craft as it turns and jibing (or gybing ) if

3476-518: The development of new crops. Price volatility greatly effects countries that are dependent on grain imports, such as certain countries in the MENA region . "Price volatility is a life-and-death issue for many people around the world" warned ICTSD Senior Fellow Sergio Marchi. "Trade policies need to incentivize investment in developing country agriculture, so that poor farmers can build resistance to future price shocks". Two major price volatility crises in

3555-433: The early 21st century, during the 2007–2008 world food price crisis and 2022 food crises , have had major negative effects on grain prices globally. Climate change is expected to create major agricultural failures , that will continue to create volatile food price markets especially for bulk goods like grains. Protection against international market prices has been an important part of how some countries have responded to

3634-466: The early steamers, which usually could barely make 8 knots (15 km/h). Ultimately, the steamships' independence from the wind and their ability to take shorter routes, passing through the Suez and Panama Canals , made sailing ships uneconomical. Until the general adoption of carvel -built ships that relied on an internal skeleton structure to bear the weight of the ship and for gun ports to be cut in

3713-429: The face of ever larger trucks . Modern issues affecting the grain trade include food security concerns, the increasing use of biofuels , the controversy over how to properly store and separate genetically modified and organic crops, the local food movement, the desire of developing countries to achieve market access in industrialized economies, climate change and drought shifting agricultural patterns, and

3792-404: The free end points into the eye of the wind and must be controlled to avoid a violent change to the other side; square rigs as they present the full area of the sail to the wind from the rear experience little change of operation from one tack to the other; and windsurfers again have flexibly pivoting and fully rotating masts that get flipped from side to side. Winds and oceanic currents are both

3871-447: The full frontal area of the sail to the wind, when changing from side to side; and windsurfers have flexibly pivoting and fully rotating masts that get flipped from side to side. A sailing craft can travel directly downwind only at a speed that is less than the wind speed. However, some sailing craft such as iceboats , sand yachts , and some high-performance sailboats can achieve a higher downwind velocity made good by traveling on

3950-632: The grain trade was divided between a few state-owned and privately owned giants. The state giants were Exportkhleb of the Soviet Union, the Canadian Wheat Board, the Australian Wheat Board, the Australian Barley Board , and so on. The largest private companies, known as the "big five", were Cargill , Continental , Louis Dreyfus , Bunge , and Andre, an older European company not to be confused with

4029-508: The gun-armed sailing warships of the Age of Sail . Sail was slowly replaced by steam as the method of propulsion for ships over the latter part of the 19th century – seeing a gradual improvement in the technology of steam through a number of developmental steps. Steam allowed scheduled services that ran at higher average speeds than sailing vessels. Large improvements in fuel economy allowed steam to progressively outcompete sail in, ultimately, all commercial situations, giving ship-owning investors

SECTION 50

#1732773332747

4108-455: The heeling moment and keeping the boat more upright. There are three common methods of reefing the mainsail: Grain trade The grain trade refers to the local and international trade in cereals such as wheat , barley , maize , and rice , and other food grains . Grain is an important trade item because it is easily stored and transported with limited spoilage, unlike other agricultural products. Healthy grain supply and trade

4187-423: The hull's resistance to heeling, yawing or progress through the water. In their most developed version, square sails are controlled by two each of: sheets, braces, clewlines , and reef tackles, plus four buntlines , each of which may be controlled by a crew member as the sail is adjusted. Towards the end of the Age of Sail, steam-powered machinery reduced the number of crew required to trim sail. Adjustment of

4266-1031: The large trading companies. By contrast, in 1980, the US government attempted to use its food power to punish the Soviet Union for its invasion of Afghanistan with an embargo on grain exports . This was seen as a failure in terms of foreign policy (the Soviets made up the deficit on the international market), and negatively impacted American farmers. Since the Second World War, the trend in North America has been toward further consolidation of already vast farms. Transportation infrastructure has also promoted more economies of scale . Railways have switched from coal to diesel fuel, and introduced hopper car to carry more mass with less effort. The old wooden grain elevators have been replaced by massive concrete inland terminals, and rail transportation has retreated in

4345-402: The mid 19th century. Sail plans with just fore-and-aft sails ( schooners ), or a mixture of the two ( brigantines , barques and barquentines ) emerged. Coastal top-sail schooners with a crew as small as two managing the sail handling became an efficient way to carry bulk cargo, since only the fore-sails required tending while tacking and steam-driven machinery was often available for raising

4424-449: The more recent André Maggi Group from Brazil. In 1972, the Soviet Union's wheat crop failed. To prevent shortages in their country, Soviet authorities were able to buy most of the surplus American harvest through private companies without the knowledge of the United States government. This drove up prices across the world, and was dubbed the " great grain robbery " by critics, leading to greater public attention being paid by Americans to

4503-416: The motive power for the sails on any given point of sail. It varies from being the true wind velocity of a stopped craft in irons in the no-go zone, to being faster than the true wind speed as the sailing craft's velocity adds to the true windspeed on a reach. It diminishes towards zero for a craft sailing dead downwind. Sailing craft A is close-hauled. Sailing craft B is on a beam reach. Sailing craft C

4582-416: The result of the sun powering their respective fluid media. Wind powers the sailing craft and the ocean bears the craft on its course, as currents may alter the course of a sailing vessel on the ocean or a river. Trimming refers to adjusting the lines that control sails, including the sheets that control angle of the sails with respect to the wind, the halyards that raise and tighten the sail, and to adjusting

4661-404: The sailing ships during this time period were the merchant ships. By 1500, Gun ports allowed sailing vessels to sail alongside an enemy vessel and fire a broadside of multiple cannon. This development allowed for naval fleets to array themselves into a line of battle , whereby, warships would maintain their place in the line to engage the enemy in a parallel or perpendicular line. While

4740-459: The sails and the anchor. Iron-hulled sailing ships represented the final evolution of sailing ships at the end of the Age of Sail. They were built to carry bulk cargo for long distances in the nineteenth and early twentieth centuries. They were the largest of merchant sailing ships, with three to five masts and square sails, as well as other sail plans . They carried bulk cargoes between continents. Iron-hulled sailing ships were mainly built from

4819-564: The same amount 15 miles by land. The large cities of the time could not exist without the supplies delivered. For example, in the first three centuries AD, Rome consumed about 150,000 tons of Egyptian grain each year. During the classical age, the unification of China and the pacification of the Mediterranean basin by the Roman Empire created vast regional markets in commodities at either end of Eurasia . The grain supply to

SECTION 60

#1732773332747

4898-413: The shape of the boat, especially with a catamaran. As the boat points off the wind, lateral force and the forces required to resist it become less important. On ice boats, lateral forces are countered by the lateral resistance of the blades on ice and their distance apart, which generally prevents heeling. Wind and currents are important factors to plan on for both offshore and inshore sailing. Predicting

4977-614: The shape of the sail, notably the outhaul , halyard , boom vang and backstay . These control the curvature that is appropriate to the windspeed, the higher the wind, the flatter the sail. When the wind strength is greater than these adjustments can accommodate to prevent overpowering the sailing craft, then reducing sail area through reefing , substituting a smaller sail or by other means. Reducing sail on square-rigged ships could be accomplished by exposing less of each sail, by tying it off higher up with reefing points. Additionally, as winds get stronger, sails can be furled or removed from

5056-440: The side, sailing ships were just vehicles for delivering fighters to the enemy for engagement. Early Phoenician, Greek, Roman galleys would ram each other, then pour onto the decks of the opposing force and continue the fight by hand, meaning that these galleys required speed and maneuverability. This need for speed translated into longer ships with multiple rows of oars along the sides, known as biremes and triremes . Typically,

5135-444: The significant improvements in land transportation that occurred during the 19th century, if water transport was an option, it was faster, cheaper and safer than making the same journey by land. This applied equally to sea crossings, coastal voyages and use of rivers and lakes. Examples of the consequences of this include the large grain trade in the Mediterranean during the classical period . Cities such as Rome were totally reliant on

5214-402: The spars, entirely until the vessel is surviving hurricane-force winds under "bare poles". On fore-and-aft rigged vessels, reducing sail may furling the jib and by reefing or partially lowering the mainsail, that is reducing the area of a sail without actually changing it for a smaller sail. This results both in a reduced sail area but also in a lower centre of effort from the sails, reducing

5293-434: The speed between the starting and ending points of the route is called the speed made good and is calculated by the distance between the two points, divided by the travel time. The limiting line to the waypoint that allows the sailing vessel to leave it to leeward is called the layline . Whereas some Bermuda-rigged sailing yachts can sail as close as 30° to the wind, most 20th-Century square riggers are limited to 60° off

5372-416: The true wind direction over the surface. The principal points of sail roughly correspond to 45° segments of a circle, starting with 0° directly into the wind. For many sailing craft, the arc spanning 45° on either side of the wind is a "no-go" zone, where a sail is unable to mobilize power from the wind. Sailing on a course as close to the wind as possible—approximately 45°—is termed "close-hauled". At 90° off

5451-427: The use of sailing vessels for commerce or naval power has been supplanted with engine-driven vessels, there continue to be commercial operations that take passengers on sailing cruises. Modern navies also employ sailing vessels to train cadets in seamanship . Recreation or sport accounts for the bulk of sailing in modern boats. Recreational sailing can be divided into two categories, day-sailing, where one gets off

5530-595: The various breadbaskets of the world. In many parts of Europe, as serfdom was abolished, great estates were accompanied by many inefficient smallholdings , but in the newly colonized regions massive operations were available to not only great nobles, but also to the average farmer. In the United States and Canada, the Homestead Act and the Dominion Lands Act allowed pioneers on the western plains to gain tracts of 160 acres (0.65 km ) (1/4 of

5609-660: The volitility of market prices. For example, farmers in the European Union , United States and Japan are protected by agricultural subsidies . The European Union's programs are organized under the Common Agricultural Policy . The agricultural policy of the United States is demonstrated through the "farm bill" , while rice production in Japan is also protected and subsidized. Farmers in other countries has attempted to have these policies disallowed by

5688-679: The voyages of James Cook and the Second voyage of HMS Beagle with naturalist Charles Darwin . In the early 1800s, fast blockade-running schooners and brigantines— Baltimore Clippers —evolved into three-masted, typically ship-rigged sailing vessels with fine lines that enhanced speed, but lessened capacity for high-value cargo, like tea from China. Masts were as high as 100 feet (30 m) and were able to achieve speeds of 19 knots (35 km/h), allowing for passages of up to 465 nautical miles (861 km) per 24 hours. Clippers yielded to bulkier, slower vessels, which became economically competitive in

5767-402: The wind passes over the stern. A sailing craft can sail on a course anywhere outside of its no-go zone. If the next waypoint or destination is within the arc defined by the no-go zone from the craft's current position, then it must perform a series of tacking maneuvers to get there on a zigzag route, called beating to windward . The progress along that route is called the course made good ;

5846-419: The wind, a craft is on a "beam reach". At 135° off the wind, a craft is on a "broad reach". At 180° off the wind (sailing in the same direction as the wind), a craft is "running downwind". In points of sail that range from close-hauled to a broad reach, sails act substantially like a wing, with lift predominantly propelling the craft. In points of sail from a broad reach to down wind, sails act substantially like

5925-540: The wind. Fore-and-aft rigs are designed to operate with the wind on either side, whereas square rigs and kites are designed to have the wind come from one side of the sail only. Because the lateral wind forces are highest when sailing close-hauled, the resisting water forces around the vessel's keel, centerboard, rudder and other foils must also be highest in order to limit sideways motion or leeway . Ice boats and land yachts minimize lateral motion with resistance from their blades or wheels. Tacking or coming about

6004-511: The world's grain trade in the mid-20th century. Additionally, farmers' cooperatives such the wheat pools became a popular alternative to the major grain companies. At the same time in the Soviet Union and soon after in China , disastrous collectivization programs effectively turned the world's largest farming nations into net importers of grain. By the second half of the 20th century,

6083-685: The world. Circular routes exist between the Americas and Europe, and between South Africa and South America. There are many routes from the Americas, Australia, New Zealand, and Asia to island destinations in the South Pacific. Some cruisers circumnavigate the globe. Sailing as a sport is organized on a hierarchical basis, starting at the yacht club level and reaching up into national and international federations; it may entail racing yachts , sailing dinghies , or other small, open sailing craft, including iceboats and land yachts. Sailboat racing

6162-479: Was invented by Richard Jenkins , a British engineer, founder and CEO of Saildrone, Inc. Saildrones have been used by scientists and research organizations like the National Oceanic and Atmospheric Administration (NOAA) to survey the marine ecosystem, fisheries, and weather. In January 2019, a small fleet of saildrones was launched to attempt the first autonomous circumnavigation of Antarctica. One of

6241-481: Was moved around locally at regular fairs . A massive expansion in the grain trade occurred when Europeans were able to bring millions of square kilometers of new land under cultivation in the Americas , Russia, and Australia, an expansion starting in the fifteenth and lasting into the twentieth century. In addition, the consolidation of farmland in Britain and Eastern Europe , and the development of railways and

#746253