USCG Exam PracticeDead reckoning — DR plot maintenance
A navigator obtains a bearing on a lighthouse at 0800 and cannot obtain a second simultaneous bearing. At 0830 the navigator advances the 0800 LOP along the DR track and crosses it with a new bearing. The resulting position is called a:
- A. Fix
- ✓ Running fixCorrect
- C. DR position
- D. Estimated position
Why B is correct
Bowditch Ch. 7 §702 defines a running fix as a fix obtained when LOPs cannot be taken simultaneously; the first LOP is advanced along the DR track to the time of the second observation and the intersection is the running fix. A fix requires simultaneous LOPs per §701.
Cited:Bowditch Ch. 7 §702