At 1200 a vessel obtains a running fix. The navigator then applies the estimated current — set 270°T, drift 1.5 knots — for 40 minutes to the subsequent DR position. The resulting position is plotted as a dot inside a square and labelled 1240. What is this position called, and why is it preferred over the DR position alone for that time?

1. A. A fix, because it incorporates two simultaneous LOPs
2. ✓ An estimated position, because it corrects the DR position for estimated set and drift and is the best position available between fixes when only the current can be estimatedCorrect
3. C. A running fix, because the current vector advances the original LOP along the DR track
4. D. A dead-reckoning position, because it projects from the last fix using course and speed only