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Matus,

What a great piece of work! I had plotted AIS data that Lars Bergman had been saving and produced the skeleton outline of what you have but I was not planning to include as much useful information as you did. Your plot is very revealing. Although we don't know how much of the time they had drones in the water it does look like they have searched at the Endurance Memorial position (the red "x") and, as expected, found nothing there. In our earlier paper https://www.cambridge.org/core/journals/journal-of-navigation/article/on-the-location-of-shackletons-vessel-endurance/5F1AD80B3445C2653F1C24EAD4B7460D/share/af04c02d4ebde51ac7addc3ea1fc34026f1a589c we state in the conclusions section "the wreck likely lies ... not as far north as Worsley placed it". Given the solid basis of this conclusion laid out there and outlined in my earlier post http://fer3.com/arc/m2.aspx/Will-anyone-ever-find-Shackletons-lost-ship-Stuart-feb-2022-g52155 I can't help wondering why they would spend time to the north where it is essentially impossible for the wreck to be. Perhaps they were constrained by ice conditions. There does appear to have been a sortie directly to the south of the Endurance Memorial position on 20 and 21 Feb but that leaves the SE quadrant tantalizingly unexplored.

Hope you will be updating this valuable plot as the search progresses. Thanks for making it,

Robin Stuart