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Day Skipper - Part 5 - Estimated
position
Once you have mastered the art of dead reckoning, the next way of determining
a future position is by calculating an estimated position or EP. This
is more accurate than a DR because it accounts for tide and wind.
Providing you know the direction and speed of the tide and, if
appropriate, you can estimate the effect of the wind it is not
difficult to predict an EP, which is shown as an equilateral triangle
point up.
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