Thibron Expedition Shipwreck (Location)
A sunken ship off the coast in Kyrenaika. You'll pass through this area during The Smugglers of Cyrene side quest, but it'll be crawling with hostiles then.
The mast of the wreck is still visible, next to a very narrow strait.
Dive down for a red chest outside the wreck,
and a white chest inside the gutted hull.
This completes the location.