USCG Exam PracticeRunning fix from a single object
A vessel is on course 270°T at 9 knots. At 1000 a bearing of 000°T is taken to a lighthouse; at 1030 a bearing of 315°T is taken to the same lighthouse. To plot the running fix, the navigator advances the 1000 LOP along the DR track by:
- ✓ 4.5 nautical miles in the direction 270°T.Correct
- B. 9 nautical miles in the direction 270°T.
- C. 9 nautical miles in the direction 315°T.
- D. 4.5 nautical miles in the direction 315°T.
Why A is correct
The vessel runs 30 minutes at 9 knots, covering 4.5 nautical miles. Per Bowditch Ch. 7 §708 and §702, the first LOP is advanced along the DR track — the course steered, 270°T — by the distance run of 4.5 nm. The direction of the current object bearing is not used to advance the LOP.