Position line
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A position line or line of position (LOP) is a line (or, on the surface of the Earth, a curve) that can be both identified on a chart (nautical chart or aeronautical chart) and translated to the surface of the Earth. The intersection of a minimum of two position lines is a fix that is used in position fixing to identify a navigator's location. There are several types of position line: * Compass bearing – the angle between a compass point 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 colored lights that indicate a safe channel
A position line or line of position (LOP) is a line (or, on the surface of the Earth, a curve) that can be both identified on a chart (nautical chart or aeronautical chart) and translated to the surface of the Earth. The intersection of a minimum of two position lines is a fix that is used in position fixing to identify a navigator's location. There are several types of position line: Compass bearing – the angle between a compass point 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 colored lights that indicate a safe channel
See also
Coordinate line Intersection (aeronautics) Navigation Position circle Sight reduction
References
Text derived from https://en.wikipedia.org/w/index.php?oldid=1334665074 under CC BY-SA 4.0; modifications have been made.