USCG Exam PracticeDead reckoning — DR plot maintenance
A navigator obtains a single bearing on a lighthouse. What does that observation produce on the chart?
- A. A fix
- B. A running fix
- ✓ A line of positionCorrect
- D. A course made good
Why C is correct
Bowditch Ch. 7 §701 defines a line of position (LOP) as a line along which the vessel is known to lie based on a single observation. A fix requires the intersection of two or more LOPs taken simultaneously; a single bearing cannot produce a fix.
Cited:Bowditch Ch. 7 §701