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Lubber Line
A lubber line, also known as a lubber's line, is a fixed line on the binnacle of a compass, or a plan position indicator radar display, pointing towards the front of the ship or aircraft, and corresponding to the craft's centerline (being the customary direction of movement). The line represents 0 degrees and is therefore the zero point from which relative bearings are measured, e.g., "twenty degrees to port". Compasses on sailboats may have additional lubber lines at forty-five degrees from the centerline. This represents about as close to the wind as the average boat will sail. These lubber lines may be used when sailing close hauled A point of sail is a sailing craft's direction of travel under sail in relation to 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 ... to see if one is on the closest course to the destination, without having to add or subtract the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Binnacle
A binnacle () is a waist-high case or stand on the deck of a ship, generally mounted in front of the helmsman, in which navigational instruments are placed for easy and quick reference as well as to protect the delicate instruments. Its traditional purpose was to hold the ship's magnetic compass, mounted in gimbals to keep it level while the ship pitched and rolled. A binnacle may be subdivided into sections and its contents typically include one or more compasses and an oil lamp or other light source. Other devices such as a sand timer for estimating speed may have been stored in the binnacle as well. Binnacle can also refer to the cluster of instruments and switches mounted in a circular casing on or near the steering column of a car. Etymology Before 18th century ''bittacle'', through French ''bitacle'', from Latin ''habitaculum'', "little dwelling". History The construction of many early (mid-18th century) binnacles used iron nails, which were later discovered to c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Compass
A compass is a device that shows the cardinal directions used for navigation and geographic orientation. It commonly consists of a magnetized needle or other element, such as a compass card or compass rose, which can pivot to align itself with North magnetic pole, magnetic north. Other methods may be used, including gyroscopes, magnetometers, and GPS receivers. Compasses often show angles in degrees: north corresponds to 0°, and the angles increase clockwise, so east is 90°, south is 180°, and west is 270°. These numbers allow the compass to show azimuths or bearing (angle), bearings which are commonly stated in degrees. If local magnetic declination, variation between magnetic north and true north is known, then direction of magnetic north also gives direction of true north. Among the Four Great Inventions, the magnetic compass was first invented as a device for divination as early as the history of science and technology in China, Chinese Han dynasty (since c. 206 BC),#Li, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Degree (angle)
A degree (in full, a degree of arc, arc degree, or arcdegree), usually denoted by ° (the degree symbol), is a measurement of a plane (mathematics), plane angle in which one Turn (geometry), full rotation is 360 degrees. It is not an SI unit—the SI unit of angular measure is the radian—but it is mentioned in the SI Brochure, SI brochure as an Non-SI units mentioned in the SI, accepted unit. Because a full rotation equals 2 radians, one degree is equivalent to radians. History The original motivation for choosing the degree as a unit of rotations and angles is unknown. One theory states that it is related to the fact that 360 is approximately the number of days in a year. Ancient astronomers noticed that the sun, which follows through the ecliptic path over the course of the year, seems to advance in its path by approximately one degree each day. Some ancient calendars, such as the Iranian calendar, Persian calendar and the Babylonian calendar, used 360 days for a year. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Port (nautical)
Port and starboard are nautical terms for watercraft and spacecraft, referring respectively to the left and right sides of the vessel, when aboard and facing the bow (front). Vessels with bilateral symmetry have left and right halves which are mirror images of each other. One asymmetric feature is where access to a boat, ship, or aircraft is at the side; it is usually only on the port side (hence the name). Side Port side and starboard side respectively refer to the left and right sides of the vessel, when aboard and facing the bow. The port and starboard sides of the vessel always refer to the same portion of the vessel's structure, and do not depend on the position of someone aboard the vessel. The port side is the side to the left of an observer aboard the vessel and , towards the direction the vessel is heading when underway in the forward direction. The starboard side is to the right of such an observer. This convention allows orders and information to be communicated ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Close Hauled
A point of sail is a sailing craft's direction of travel under sail in relation to 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 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 ''beating'', a point of sail when the sails are ''close-hauled''. At 90° off the wind, a craft is on a ''beam reach''. The point of sail between beating and a beam reach is called a ''close 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''. A given point of sail (beating, close reach, beam reach, broad reach, and running downwind) is defined in reference to the true wind—the wind felt by a stationary observ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Directional Gyro
Direction may refer to: *Body relative direction, for instance left, right, forward, backwards, up, and down ** Anatomical terms of location for those used in anatomy ** List of ship directions *Cardinal direction *Bearing (navigation) Mathematics and science *Direction vector, a unit vector that defines a direction in multidimensional space *Direction of a subspace of a Euclidean or affine space * Directed set, in order theory * Directed graph, in graph theory * Directionality (molecular biology), the orientation of a nucleic acid Music * For the guidance and cueing of a group of musicians during performance, see conducting * ''Direction'' (album) a 2007 album by The Starting Line * Direction Records, a label began by Bobby Darin. * Direction (record label), a record label in the UK in the late 1960s, a subsidiary of CBS Records, specialising in soul music * '' Directions: The Plans Video Album'', a DVD video album made of videos inspired by songs from indie rock/pop band ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Landlubber
In English-speaking popular culture, the modern pirate stereotype owes its attributes mostly to the imagined tradition of the 18th-century Caribbean pirate sailing off the Spanish Main and to such celebrated 20th-century depictions as Captain Hook and his crew in the theatrical and film versions of J. M. Barrie's ''Peter Pan'', Robert Newton's portrayal of Long John Silver in the 1950 film adaptation of the Robert Louis Stevenson novel ''Treasure Island'', and various adaptations of the Middle Eastern pirate, ''Sinbad the Sailor''. In these and countless other books, films, and legends, pirates are portrayed as "swashbucklers" and " plunderers". They are shown on ships, often wearing eyepatches or peg legs, having a parrot perched on their shoulder, speaking in a West Country accent, and saying phrases like "Arr, matey" and "Avast, me hearty". Pirates have retained their image through pirate-themed tourist attractions, film, toys, books and plays. Origins The characteristic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Navigation
Navigation is a field of study that focuses on the process of monitoring and controlling the motion, movement of a craft or vehicle from one place to another.Bowditch, 2003:799. The field of navigation includes four general categories: land navigation, marine navigation, air navigation, aeronautic navigation, and space navigation. It is also the term of art used for the specialized knowledge used by navigators to perform navigation tasks. All navigational techniques involve locating the navigator's Position (geometry), position compared to known locations or patterns. Navigation, in a broader sense, can refer to any skill or study that involves the determination of position and Relative direction, direction. In this sense, navigation includes orienteering and pedestrian navigation. For marine navigation, this involves the safe movement of ships, boats and other nautical craft either on or underneath the water using positions from navigation equipment with appropriate nautical char ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Navigational Equipment
Navigation is a field of study that focuses on the process of monitoring and controlling the movement of a craft or vehicle from one place to another.Bowditch, 2003:799. The field of navigation includes four general categories: land navigation, marine navigation, aeronautic navigation, and space navigation. It is also the term of art used for the specialized knowledge used by navigators to perform navigation tasks. All navigational techniques involve locating the navigator's position compared to known locations or patterns. Navigation, in a broader sense, can refer to any skill or study that involves the determination of position and direction. In this sense, navigation includes orienteering and pedestrian navigation. For marine navigation, this involves the safe movement of ships, boats and other nautical craft either on or underneath the water using positions from navigation equipment with appropriate nautical charts (electronic and paper). Navigation equipment for ships is ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
