Chart Navigation & Plotting · Fixes — Running Fix with Current
When advancing an LOP for a running fix in a known current, you advance the line for the:
- ACompass error
- BCourse steered through the water only
- CDistance to the next port
- DCourse and distance made good over the ground (the run with set and drift applied)✓ Correct
Explanation
The earlier LOP is advanced parallel to itself by the vessel's actual movement over the ground. If a current is known, the run through the water is combined with set and drift so the LOP is advanced for the true ground track before crossing it with the later LOP.
Authority: Bowditch (Pub. No. 9), The Running Fix
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