Chart Navigation & Plotting · Fixes & LOPs
A line of position obtained from a single radar range to a charted object plots as:
- AA straight line through the object
- BA bearing line from the vessel
- CA point at the object
- DAn arc (circle) of that radius centered on the object✓ Correct
Explanation
A measured range places you somewhere on a circle of that radius around the object, so the LOP is an arc. Radar range LOPs are generally more accurate than radar bearings; crossing a range arc with a bearing or a second range yields a fix.
Authority: Bowditch, Pub. No. 9 (radar navigation)
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