USCG Exam Practice · Visual piloting — three-bearing fixes, danger bearings
A fix is obtained when two or more LOPs are:
- Aadvanced along the DR track to a common time
- Btaken simultaneously and their intersection is plotted✓ correct
- Cderived from a single object using the doubling-the-angle technique
- Dcompared against a running fix from the previous watch
Why B is correct
Per Bowditch Ch. 7 §701, a fix is the intersection of two or more LOPs taken simultaneously. Advancing an LOP along the DR track produces a running fix, which is less accurate.
Cited:Bowditch Ch. 7 §701
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