Ancor circles

I hope you can see this. This a gps picture of the track of the boat last night on the anchor. The center of the circles is the anchor. Usually the whole night goesbby and all you see is the boat staying in one area like the upper right. Some movement but generally little. Here we see the boat going completely around the anchor. This is what happens when the current goes one way strongly while the wind goes the opposite way.

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