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State vector (navigation)

In navigation, a state vector is a set of data describing exactly where an object is located in space, and how it is moving. From a state vector, and sufficient mathematical conditions, the objects past and future position can be determined.

Submarine navigation

Submarine navigation underwater requires special skills and technologies not needed by surface ships. The challenges of underwater navigation have become more important as submarines spend more time underwater, travelling greater distances and at ...

Subsea Marker

Subsea markers are passive identification markers used under water to identify equipment. As sub sea equipment may be covered in underwater growth like seaweed, kelp and algae, special non-fouling materials are necessary for equipment marking to ...

Summer draft

Summer draft is a naval term for the worst-case loaded draft a ship can have. This draft is corrected for the worst-case seasonal conditions. During summer the water is warmer, and thus less dense and expands slightly: see Thermal expansion. This ...

Sun compass in animals

Many animals are able to navigate using the Sun as a compass. Orientation cues from the position of the Sun in the sky are combined with an indication of time from the animals internal clock. There is evidence that some animals can navigate using ...

Sun sensor

A sun sensor is a navigational instrument used by spacecraft to detect the position of the sun. Sun sensors are used for attitude control, solar array pointing, gyro updating, and fail-safe recovery. In addition to spacecraft, sun sensors find us ...

Surgical segment navigator

The surgical segment navigator is a computer-based system for use in surgical navigation. It is integrated into a common platform, together with the surgical tool navigator, the surgical microscope navigator and the 6DOF manipulator, developed by ...

Tango (platform)

Tango was an augmented reality computing platform, developed and authored by the Advanced Technology and Projects, a skunkworks division of Google. It used computer vision to enable mobile devices, such as smartphones and tablets, to detect their ...

Tidal atlas

A tidal atlas or a tidal stream atlas is used to predict the direction and speed of tidal currents. A tidal atlas usually consists of a set of 12 or 13 diagrams, one for each hour of the tidal cycle, for a coastal region. Each diagram uses arrows ...

Tidal diamond

Tidal diamonds are symbols on British admiralty charts that indicate the direction and speed of tidal streams. The symbols consist of a letter of the ISO basic Latin alphabet in a rhombus, printed in purple ink. On any particular chart each tidal ...

Tide

Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun, and the rotation of the Earth. Tide tables can be used for any given locale to find the predicted times and ampl ...

Tide table

Tide tables, sometimes called tide charts, are used for tidal prediction and show the daily times and levels of high and low tides, usually for a particular location. Tide heights at intermediate times can be approximated by using the rule of twe ...

Tide-predicting machine

A tide-predicting machine was a special-purpose mechanical analog computer of the late 19th and early 20th centuries, constructed and set up to predict the ebb and flow of sea tides and the irregular variations in their heights – which change in ...

Tide-Predicting Machine No. 2

Tide-Predicting Machine No. 2, also known as Old Brass Brains, was a special-purpose mechanical computer that uses gears, pulleys, chains, and other mechanical components to compute the height and time of high and low tides for specific locations ...

Time to first fix

Time to first fix is a measure of the time required for a GPS navigation device to acquire satellite signals and navigation data, and calculate a position solution.

Tracking system

A tracking system is used for the observing of persons or objects on the move and supplying a timely ordered sequence of location data for further processing.

Traffic separation scheme

A traffic separation scheme or TSS is a maritime traffic-management route-system ruled by the International Maritime Organization or IMO. The traffic-lanes indicate the general direction of the ships in that zone; ships navigating within a TSS al ...

Trinity House of Leith

Trinity House, 99 Kirkgate, is a category A listed building in Leith, Edinburgh, Scotland, which was a guild hall, customs house, and centre for maritime administration and poor relief. In the Late Middle Ages and Early Modern Era it also served ...

True north

True north is the direction along Earths surface towards the geographic North Pole or True North Pole. Geodetic north differs from magnetic north the direction a compass points toward the Magnetic North Pole, and from grid north the direction nor ...

Turn-by-turn navigation

Turn-by-turn Navigation is a feature of some GPS navigation devices where directions for a selected route are continually presented to the user in the form of spoken or visual instructions. The system keeps the user up-to-date about the best rout ...

TVMDC

TVMDC is a method for converting true, magnetic and compass headings. TVMDC is a mnemonic initialism for true, variation, magnetic, deviation, compass. The most common use of the TVMDC method is correcting courses during nautical navigation.

Ultra-short baseline

USBL is a method of underwater acoustic positioning. A complete USBL system consists of a transceiver, which is mounted on a pole under a ship, and a transponder or responder on the seafloor, on a towfish, or on an ROV. A computer, or "topside un ...

Underwater acoustic positioning system

An underwater acoustic positioning system is a system for the tracking and navigation of underwater vehicles or divers by means of acoustic distance and/or direction measurements, and subsequent position triangulation. Underwater acoustic positio ...

United States Coast Pilot

United States Coast Pilot is a nine-volume American navigation publication distributed yearly by the Office of Coast Survey, a part of the National Oceanic and Atmospheric Administrations National Ocean Service. The purpose of the publication is ...

Vessel monitoring system

Vessel Monitoring Systems is a general term to describe systems that are used in commercial fishing to allow environmental and fisheries regulatory organizations to track and monitor the activities of fishing vessels. They are a key part of monit ...

Volta do mar

Volta do mar, volta do mar largo, or volta do largo is a navigational technique perfected by Portuguese navigators during the Age of Discovery in the late fifteenth century, using the dependable phenomenon of the great permanent wind circle, the ...

Les voyages aventureux du Capitaine Martin de Hoyarsal, habitant du çubiburu

Les voyages aventureux du Capitaine Martin de Hoyarsabal, habitant du Cubiburu, contenant les regles et enseignments necessaires à la bonne et seure navigation is a treatise on navigation by Martin de Hoyarçabal, from the French Basque Country. I ...

Wayfinder

Wayfinder was a wholly owned subsidiary of Vodafone specializing in creating mobile navigation systems for a number of platforms such as Symbian 2nd and 3rd edition, UIQ, Windows Mobile and some other smartphones. An external Bluetooth GPS receiv ...

Waypoint

A waypoint is an intermediate point or place on a route or line of travel, a stopping point or point at which course is changed, first use of the term tracing to 1880. In modern terms, it most often refers to coordinates which specify ones positi ...

Weriyeng

Weriyeng is one of the last two schools of traditional navigation found in the central Caroline Islands in Micronesia, the other being Fanur. By tradition these two schools were considered to be the most high of all the schools of navigation that ...

Windage

Windage is a force created on an object by friction when there is relative movement between air and the object. Windage loss is the reduction in efficiency due to windage forces. For example, electric motors are affected by friction between the r ...

World Geodetic System

The World Geodetic System is a standard for use in cartography, geodesy, and satellite navigation including GPS. This standard includes the definition of the coordinate systems fundamental and derived constants, the ellipsoidal Earth Gravitationa ...

World Port Index

The World Port Index contains a tabular listing of thousands of ports throughout the world, describing their location, characteristics, known facilities, and available services. Of particular interest are the applicable volume of Sailing Directio ...

Africa Specialty Group

The Africa Specialty Group is one of many specialty groups within the Association of American Geographers. The group is composed of academic geographers with research interests in Africa. This group publishes the African Geographical Review, a pe ...

Anton Melik Geographical Institute

The Anton Melik Geographical Institute was founded in 1946 by the Slovenian Academy of Sciences and Arts. In 1976 it was named after the Slovene geographer and academy member Anton Melik, who was the first head of the institute. Since 1981, the i ...

Berkeley School of Latin Americanist Geography

The Berkeley School of Latin Americanist Geography was founded by the American geographer Carl O. Sauer. Sauer was a professor of geography at the University of California at Berkeley from 1923 until becoming professor emeritus in 1957 and was in ...

Bureau des Longitudes

The Bureau des Longitudes is a French scientific institution, founded by decree of 25 June 1795 and charged with the improvement of nautical navigation, standardisation of time-keeping, geodesy and astronomical observation. During the 19th centur ...

CEIPP

The C.E.I.P.P., or the Centre dEtudes sur lile de Paques et la Polynesie on Easter Island and Polynesia") is a geographic and anthropological group created by Andre Valenta and Michel-Alain Jumeau. The CEIPP is notable for its members publication ...

Center for Urban and Regional Analysis

Center for Urban and Regional Analysis The Center for Urban & Regional Analysis is an interdisciplinary research organization of The Ohio State University. CURAs mission is to serve as a bridge across academia, industry, and the policy sector by ...

Centre for Computational Geography

The Centre for Computational Geography is an inter-disciplinary research centre based at the University of Leeds. The CCG was founded in 1993 by Stan Openshaw and Phil Rees, and builds on over 40 years experience in spatial analysis and modelling ...

Conference of Latin Americanist Geographers

The Conference of Latin Americanist Geographers was formed in 1970 to foster geographic education and research on Latin America. A Board of Directors governs CLAG. CLAG publishes a Newsletter and the Journal of Latin American Geography. It also o ...

Depot de la Guerre

The Depot de la Guerre was Frances military archive and cartography department, set up in 1688 under Louis XIV and expanded during the French Revolutionary Wars and the Napoleonic Wars.

EUROGEO-European Association of Geographers

EUROGEO is a European scientific society, which networks geographers. It is an international non-governmental organisation. Since 1987 EUROGEO has been a participative member of the Conference of International NGOs of the Council of Europe. The a ...

European Geography Association

The European Geography Association, abbreviated EGEA, is a European network of geography students and young geographers, with the intention of exchanging geographical knowledge. To achieve this, the entities of EGEA organize congresses, exchanges ...

Geographical Association

The Geographical Association is a United Kingdom-based subject association whose objects are the advancement of education for the public benefit by furthering geographical knowledge and understanding, through the promotion and dissemination of go ...

Hellenic Military Geographical Service

Established in 1889 as the" Geodetic Mission” with the purpose of compiling the" Topographic and Cadastral Map of the Country”, the service acquired its current name in 1926. Today it supports both the Greek Army and the general public with carto ...

Israeli Geographical Association

Israeli Geographical Association is a professional association of geographers in Israel. the Society members engaged in all areas of human and physical Geography. the Israeli Geographic Society is working since 1959 to promote Israels varied geog ...

Most Ancient European Towns Network

The Most Ancient European Towns Network is a working group of the oldest cities in Europe. It was founded in 1994, with the idea coming from the town of Argos in Greece, presented to the European Union. The group exists to discuss issues such as ...

Ordnance Survey

Ordnance Survey is the national mapping agency for Great Britain. The agencys name indicates its original military purpose, which was to map Scotland in the wake of the Jacobite rising of 1745. There was also a more general and nationwide need in ...

Pan American Institute of Geography and History

The Pan American Institute of Geography and History is an international organisation dedicated to the generation and transference of knowledge specialized in the fields of cartography, geography, history and geophysics. The institute was created ...

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Pino - logical board game which is based on tactics and strategy. In general this is a remix of chess, checkers and corners. The game develops imagination, concentration, teaches how to solve tasks, plan their own actions and of course to think logically. It does not matter how much pieces you have, the main thing is how they are placement!

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