Chart Navigation & Plotting · Fixes and LOPs
A single line of position from one object tells you:
- AYour exact position
- BThat you are somewhere on that line, but not where along it✓ Correct
- CYour speed over ground
- DYour set and drift
Explanation
A single LOP places the vessel somewhere along that line. A fix requires the intersection of two (preferably three) LOPs taken simultaneously or advanced to a common time.
Authority: Bowditch, American Practical Navigator (Pub. 9), piloting
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