Caledon Highlands - It seem like the north-south passage in Caledon Highlands, just south of the entry to the Speirling Isles, has been slightly terraformed.
It used to allow enough space even for a Tako there, but I just tried with the Canal Runner and it wasn't able to make it through. Even though it seems to be able to pass (it is 3.95m wide at the narrowest part), there are some underwater cliffs, making it an effective passage of 2.78m.
I will mark it out on the map I am currently updating.
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