The Solong’s three past passages at the accident site:
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March 3: underway from Port Grangemouth, in the Firth of Forth (near Edinburgh), to Rotterdam.
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March 8: underway from Rotterdam to Grangemouth.
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March 10: the crash trip, underway from Grangemouth to Rotterdam.
The AIS-Route for all three voyages; from outside of the Firth of Forth to the crash site appears to be an identical straight line.
Only when strongly zooming in, it shows three straight voyages.
On March 5/6 they entered the Humber River on a voyage Rotterdam-Hull-Rotterdam…