What is Line Of Position?

Information about Line Of Position

A position line is a line that can be identified both on a nautical chart or aeronautical chart and by observation out on the surface of the earth. The intersection of two position lines is a fix that used in position fixing to identify the navigator's location.

There are several types of position line:
  • Compass bearing - the angle between north and the line passing through the compass and the point of interest
  • Transit - a line passing through the observer and two other reference points
  • Leading line - the line passing through two marks indicating a safe channel
  • Leading lights - the line passing through two beacons indicating a safe channel
  • Sector lights – the lines created by masked coloured lights that indicate a safe channel

See also

nautical chart is a graphic representation of a maritime area and adjacent coastal regions. Depending on the scale of the chart, it may show depths of water and heights of land (topographic map), natural features of the seabed, details of the coastline, navigational hazards,
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An aeronautical chart is a map designed to assist in navigation of aircraft, much as nautical charts do for watercraft, or a roadmap for drivers. Using these charts and other tools pilots are able to determine their position, best route to a destination, navigation aids along the
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EARTH was a short-lived Japanese vocal trio which released 6 singles and 1 album between 2000 and 2001. Their greatest hit, their debut single "time after time", peaked at #13 in the Oricon singles chart.
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A position fix or simply a fix is a term used in position fixing in navigation to describe a position derived from measuring external reference points.

The term is generally used only with manual or visual techniques such as the use of intersecting visual or radio
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Position fixing is the branch of navigation concerned with the use of a variety of visual and electronic methods to determine the position of a ship, aircraft or person on the surface of the Earth.
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For other uses, see Compass (disambiguation).


COMPASS is an acronym for COMPrehensive ASSembler. COMPASS is a macro assembly language on Control Data Corporation's 3000 series, and on the 60-bit CDC 6000 series, 7600 and
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In navigation, a bearing is the clockwise angle between a reference direction (or a datum line) and the direction to an object. Unless otherwise specified, the reference direction is generally understood to be magnetic North, in which case the term compass bearing
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angle (in full, plane angle) is the figure formed by two rays sharing a common endpoint, called the vertex of the angle. The magnitude of the angle is the "amount of rotation" that separates the two rays, and can be measured by considering the length of circular arc swept
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North is one of the four cardinal directions, specifically the direction that, in Western culture, is treated as the primary direction: north is used (explicitly or implicitly) to define all other directions; the (visual) top edges of maps usually correspond to the
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In navigation and position fixing, a transit occurs when a navigator observes two fixed reference points that are in line with the navigator. This creates a position line. The intersection of two position lines tells the navigator his location.
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A leading line is a line formed by a pair of marks, which are generally man-made, that are used in position fixing and navigation, to indicate a safe passage through a shallow or dangerous channel.
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Leading lights (aka Range Lights) are a pair of light beacons, used in position fixing and navigation, to indicate a safe passage for vessels entering a shallow or danagerous channel.
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Sector lights are a man-made pilotage and position fixing aid that indicates a safe channel through shallow or dangerous waters.

Generally, there are three lights of different colours, each identifying a navigational sector:

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Navigation is the process of planning, recording, and controlling the movement of a craft or vehicle from one place to another.[1] The word navigate is derived from the Latin roots navis meaning "ship" and agere meaning "to move" or "to direct.
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