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:
- 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 lines - 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
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