Two Sun lines can be used to provide an estimated position. For our example, Chief Sheedy plots a new estimated position (EP) at 32° 05' N 055° 00.0' W, then plots future DR positions from this estimated position.
We can now get an estimated position using the two Sun lines and our DR position. In Navy parlance, the term estimated position is used when we have incomplete data or data of questionable accuracy. Having less than three lines of position constitute incomplete data. Once a third LOP is determined, we will then have a fix. A square is used to symbolize an estimated position on a chart.
Chief Sheedy demonstrates marking estimated position on the plot.