You are plotting a running fix in an area where there is a determinable current. How should this current be treated in determining the position?

Correct Answer: Option C — The course and speed made good should be determined and used to advance the LOP.

According to Bowditch and standard piloting principles, when a known current exists, dead reckoning positions must incorporate set and drift. The course and speed made good (SMG) are determined by vector addition of the vessel's heading/speed and the current vector, ensuring the advanced line of position is accurate.