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Further on the position of LM-12:44, it’s a bit upwind from the actual mark. It calculates the mark position as halfway between the point of losing the groove approaching the mark to regaining the groove after the mark. In the case of LM 12:44, analyzing the raceQs track, you lost the groove around 12:43:45 before putting in three jibes approaching the mark You next regained the groove 12:45:40, so it determined the mark at your position halfway between, at 12:44:45.
There’s always room for improvement in the algorithm and I will bear in mind this scenario in the next iteration. It doesn’t look for the most upwind or downwind position, as it’s a bit tricky, but might be worth the effort.