USCG Exam PracticeDead reckoning — DR plot maintenance
In a running fix, the first LOP is advanced to the time of the second observation. Along what track is it advanced?
- A. The set and drift vector of the prevailing current
- B. The course over ground derived from the current triangle
- ✓ The DR trackCorrect
- D. A bearing line from the same object observed a second time
Why C is correct
Bowditch Ch. 7 §702 specifies that in a running fix the first LOP is advanced along the DR track to the time of the second observation. Advancing along the current vector or course over ground would be an error in procedure.
Cited:Bowditch Ch. 7 §702