Longitude

•  Cairn

  A cairn is a manmade pile of stones, often in a conical form. They are usually found in uplands, on moorland, on mountaintops or near waterways.

  

  30.0%
  

  30.0%
  

  40.0%
  
•  Global Positioning System

  The Global Positioning System (GPS) is a U.S. space-based global navigation satellite system. It provides reliable positioning, navigation, and timing services to worldwide users on a continuous basis in all weather, day and night, anywhere on or near the Earth which has an unobstructed view of four or more GPS satellites. GPS is made up of three segments: Space, Control and User.

  

  35.3%
  

  23.5%
  

  41.2%
  
•  Geodesy

  Geodesy, also called geodetics, a branch of earth sciences, is the scientific discipline that deals with the measurement and representation of the Earth, including its gravitational field, in a three-dimensional time-varying space. Geodesists also study geodynamical phenomena such as crustal motion, tides, and polar motion. For this they design global and national control networks, using space and terrestrial techniques while relying on datums and coordinate systems.

  

  18.8%
  

  31.3%
  

  50.0%
  
•  Hull (watercraft)

  A hull is the watertight body of a ship or boat. Above the hull is the superstructure and/or deckhouse, where present. The line where the hull meets the water surface is called the waterline. The structure of the hull varies depending on the vessel type.

  

  14.3%
  

  42.9%
  

  42.9%
  
•  Latitude

  Latitude, usually denoted by the Greek letter phi gives the location of a place on Earth (or other planetary body) north or south of the equator. Lines of Latitude are the imaginary horizontal lines shown running east-to-west (or west to east) on maps (particularly so in the Mercator projection) that run either north or south of the equator.

  

  18.2%
  

  27.3%
  

  54.5%
  
•  Lighthouse

  A lighthouse is a tower, building, or framework designed to emit light from a system of lamps and lenses or, in older times, from a fire and used as an aid to navigation and to pilots at sea or on inland waterways. Lighthouses are used to mark dangerous coastlines, hazardous shoals and reefs, and safe entries to harbors and can also assist in aerial navigation.

  

  25.0%
  

  25.0%
  

  50.0%
  
•  Nautical mile

  The nautical mile (symbol M, NM, Nm or nmi) is a unit of length corresponding approximately to one minute of arc of latitude along any meridian. By international agreement it is exactly 1852 meters (approximately 6076 feet). It is a non-SI unit (although accepted for use in the SI by the BIPM) used especially by navigators in the shipping and aviation industries, and also in polar exploration.

  

  66.7%
  

  11.1%
  

  22.2%
  
•  North Pole

  The North Pole, also known as the Geographic North Pole or Terrestrial North Pole, is, subject to the caveats explained below, defined as the point in the northern hemisphere where the Earth's axis of rotation meets the Earth's surface. It should not be confused with the North Magnetic Pole. The North Pole is the northernmost point on Earth, lying diametrically opposite the South Pole. It defines geodetic latitude 90° North, as well as the direction of True North.

  

  33.3%
  

  44.4%
  

  22.2%
  
•  Navigation

  Navigation is the process of reading, and controlling the movement of a craft or vehicle from one place to another. It is also the term of art used for the specialized knowledge used by navigators to perform navigation tasks. The word navigate is derived from the Latin "navigate", which is the command "sail". All navigational techniques involve locating the navigator's position compared to known locations or patterns.

  

  37.5%
  

  25.0%
  

  37.5%
  
•  Navigation research

  Whereas originally the term Navigation applies to the process of directing a ship to a destination, Navigation research deals with fundamental aspects of navigation in general. It can be defined as "The process of determining and maintaining a course or trajectory to a goal location" (Franz, Mallot, 2000). It concerns basically all moving agents, biological or artificial, or remote-controlled.

  

  33.3%
  

  33.3%
  

  33.3%
  

• Navigation by likeorhate
• Lines of longitude by likeorhate
• Time signal radio stations by likeorhate

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•  Carter County, Montana

  Carter County is a county located in the U.S. state of Montana. As of 2000, the population was 1,360. Its county seat is Ekalaka.

  

  0.0%
  

  0.0%
  

  0.0%
  
• Military of Indonesia by likeorhate
•  Charles-Clément Boniface

  

  28.0%
  

  44.0%
  

  28.0%
  
•  Masonic Temple (Detroit)

  

  28.0%
  

  32.0%
  

  40.0%
  
•  Benjamin Tudela

  

  50.0%
  

  16.7%
  

  33.3%