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Lines 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:
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Compass bearing - the angle between north and the line passing through the compass and the point of interest
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Transit - a line passing through the observer and two other reference points
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Leading line - the line passing through two marks indicating a safe channel
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Leading lights - the line passing through two beacons indicating a safe channel
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Sector lights – the lines created by masked coloured lights that indicate a safe channel
Last updated: 08-19-2005 09:02:19