At 1200 a vessel's DR position is plotted. The navigator then applies an estimated current with a set of 045° and a drift of 2 knots for 1 hour. The resulting position is plotted as a dot inside a square. What is this position called, and what does it represent?

Question

Accepted Answer

C. An estimated position (EP); it is the DR position corrected for estimated set and drift — The estimated position (EP) is obtained by laying off the current's set and drift vector from the DR position. It is plotted as a dot inside a square and represents the best available position between fixes when only the current can be estimated. Set is the direction toward which the current flows; drift is its speed. (Bowditch Ch. 8 §803)

Answer

A. A fix; it represents a position confirmed by two or more lines of position

Answer

B. A DR position; it represents course and speed made good over the ground

Answer

D. A running fix; it represents a single LOP advanced along the course line

At 1200 a vessel's DR position is plotted. The navigator then applies an estimated current with a set of 045° and a drift of 2 knots for 1 hour. The resulting position is plotted as a dot inside a square. What is this position called, and what does it represent?

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