I had two GPS turned on and none of them showed a 0.6 meter shoal. I did not look at the chart as this is my home area but I should have as the shoal is mapped on the chart. According to the coast guard there is no position marker because it is not in an official fairway. But we were not the first they had pulled off (and probably not the last) so there should be a physical marker. The insurance companies would probably save a few swedish crowns with a physical marker.
Weather
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